From patchwork Thu Apr 23 07:39:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505193 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E506492A for ; Thu, 23 Apr 2020 07:40:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB6EC215A4 for ; Thu, 23 Apr 2020 07:40:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627654; bh=RCj0gKu3XvIpSQCzLyiZJ8nln5p+yJ+rZXqi6Ggqjyc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TBjQoFL29A6DtLqngu5ckvsB42xBfMp8kYJwJ8gLI+BWMhd5sxhfTd+Ns7ovwzO3N aFiSw8rh97+Ps2gMTQlVnC+6Oc5S2JlPqjX1p0wrSczlMtWg+91bFQeKE1vrfs2+yn cRO9XyltuiO0Tc+HsLza3Yvbr7iD7UVT9ep30ILo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726974AbgDWHku (ORCPT ); Thu, 23 Apr 2020 03:40:50 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:32267 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726989AbgDWHkt (ORCPT ); Thu, 23 Apr 2020 03:40:49 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9M000368; Thu, 23 Apr 2020 16:39:33 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9M000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627574; bh=etjXsdFQORx4gLL7yHfpFDxgLm5eIEPJc35auHNsBS8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OdG1U0mvDU6Qg+Q8reUgMxjQsLczKGy3gDu4zS7XBoirXDmmxluhW75bZldtxGt7k /syvDaNTqoK9lFdDISe7PNckoqZgaxz7VY+HZzXULU/lWOtp0o83sKPtIkRJqEf1et /YgAye82oOT2JJeqVBoApqqB4JB7SleqV8rjo2QBl8xy5q3f2ht+J/vPYx7irwD1Xp 4wHrQTkcYKTN9P1Jcmj7eMWYpMs4kGuA3AVP26rMjAx1GLeAH8IvsMXN+7njpFEGLg 6zx4FM+MTczpSfBw9pJGfuVj7rreHECcgqYPk+8pM3CWPvdR285WM5uCZUWlF1CrYM dWo7XwdI0iNIw== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Jonathan Corbet , Michal Marek , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 01/16] Documentation: kbuild: fix the section title format Date: Thu, 23 Apr 2020 16:39:14 +0900 Message-Id: <20200423073929.127521-2-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Make it consistent with the other sections. Signed-off-by: Masahiro Yamada --- Documentation/kbuild/makefiles.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst index 04d5c01a2e99..b80257a03830 100644 --- a/Documentation/kbuild/makefiles.rst +++ b/Documentation/kbuild/makefiles.rst @@ -1241,7 +1241,8 @@ When kbuild executes, the following steps are followed (roughly): will be displayed with "make KBUILD_VERBOSE=0". ---- 6.9 Preprocessing linker scripts +6.9 Preprocessing linker scripts +-------------------------------- When the vmlinux image is built, the linker script arch/$(ARCH)/kernel/vmlinux.lds is used. From patchwork Thu Apr 23 07:39:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505209 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A412192C for ; Thu, 23 Apr 2020 07:42:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C5EA21569 for ; Thu, 23 Apr 2020 07:42:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627721; bh=/JWvupmEMySxDqYIYZIYncvR2Q8mmZsljXsYjNOnvIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xenUerJ/2CvZXLhOhuIPCAWvEnT6gZTJ1IflnFm7CZeAHBp426lWG9WH4a+VgB0ke Q6S/LullCEYKvcq96Ny/F+rNMLsWff3QVne8cWd16IwXeyoHf0V3KIalkminezTAoo aYuzsft0/YOAYi7rB8WGKgmAcGTt9UfihZPaJfOQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727100AbgDWHlg (ORCPT ); Thu, 23 Apr 2020 03:41:36 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31862 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726919AbgDWHkf (ORCPT ); Thu, 23 Apr 2020 03:40:35 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9N000368; Thu, 23 Apr 2020 16:39:34 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9N000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627574; bh=LAmTf3avyguNhJLnR/j7TVLMdgz9CQZK990PrBeMhx4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MSs+1vgXqBRAkGhPA8eINQND3Yn3h3DtPWIMZsni9ragUGcGyzFInzKyQzOgPwj++ t/6Zn74uvLNxz0xoKXv9ZLiRXjPGrpwwJhlHI5R370DTaF/8peZy7BlJt488ShbDKJ 2iGcIVC943qxlVMRtCZJZX8d2u9Y400/LFJDuj6riX+Pgepq5jThP/0jS+LvL/htcS 3rBViAksHx4UOAcJhURudlp2ncwDiysmcG6lWfX1ZxPHfU0j88pgC5JZ0hVjpqnIYw VsARbonJsLwaja8ArPmH08KXCpu8OiiI0zZyIg1PzYPZGUW6NBioyaVqT3B/Gl/4WX wcJns61R/pDpw== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Josh Poimboeuf , linux-kernel@vger.kernel.org Subject: [PATCH 02/16] Revert "objtool: Skip samples subdirectory" Date: Thu, 23 Apr 2020 16:39:15 +0900 Message-Id: <20200423073929.127521-3-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This reverts commit 8728497895794d1f207a836e02dae762ad175d56. This directory contains no object. Cc: Josh Poimboeuf Signed-off-by: Masahiro Yamada Acked-by: Josh Poimboeuf --- samples/Makefile | 1 - 1 file changed, 1 deletion(-) diff --git a/samples/Makefile b/samples/Makefile index f8f847b4f61f..5ce50ef0f2b2 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -1,6 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for Linux samples code -OBJECT_FILES_NON_STANDARD := y obj-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs/ obj-$(CONFIG_SAMPLE_CONFIGFS) += configfs/ From patchwork Thu Apr 23 07:39:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505203 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E22AC92A for ; Thu, 23 Apr 2020 07:41:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6648215A4 for ; Thu, 23 Apr 2020 07:41:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627696; bh=OAEdO+IFLZ8N189wG3BknW5AiXVpPlZ0lS2ZfVkhu6c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ItOzXTtWYqfzdp38Uh5r4eJhUsC7y5nNIlXw71IbJDlcMIydSLrCWrMeky71heDCa axIbOg2Zg0/u4quXgeeWki38lBb7MHKGJqKnRhpG3HmWREykvnTjq6LFsikCsH5o5z qR5ZvpdZz+wdIy/VUbd3102UNrIXofsArOv2tZtY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727079AbgDWHlg (ORCPT ); Thu, 23 Apr 2020 03:41:36 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:33137 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727057AbgDWHlR (ORCPT ); Thu, 23 Apr 2020 03:41:17 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9O000368; Thu, 23 Apr 2020 16:39:35 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9O000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627575; bh=myxup6EGe0ikE/kZA9HlfZByZy7k5g2S+MsusXB8OsE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M/y7bmq/WkMKS6RcGf2/hrRssIL6AXYXpdNHOKWMGCdSpE5CMgVCPq1OXEyGDX2gT llvMT+gX75+2USBLL4CYyGOybViCEMRMeSzCqRaUsAaSEsufU/EyFq7nAqDZH3CJwP DcM+sm3rPamr4Dd7wtGNnSddS9HHn8Ac8vn1tRkKoAmJJEU3G4eQyHBMoH3n3KbDQX Ocks0hz9NsMxqFma+ckEcyq3gBwetKwYEhReaLqoErMxgVd9hSrTTFRW1pCImWEqhc rhUBzio3Y/ky/tz0OhLN2ngoMREOIlnDDUaAg/tMtx0mz/zQMZBM+g6jetzyAizSVx UUkmR/KHtSPQg== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , John Fastabend , KP Singh , Martin KaFai Lau , Michal Marek , Song Liu , Yonghong Song , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 03/16] kbuild: add infrastructure to build userspace programs Date: Thu, 23 Apr 2020 16:39:16 +0900 Message-Id: <20200423073929.127521-4-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Kbuild supports the infrastructure to build host programs, but there was no support to build userspace programs for the target architecture (i.e. the same architecture as the kernel). Sam Ravnborg worked on this a long time ago. https://lkml.org/lkml/2014/7/13/154 But, it was not merged. One problem at that time was, there was no good way to know whether $(CC) can link standalone programs. In fact, pre-built kernel.org toolchains [1] do not provide libc. Now, we can handle this cleanly because the compiler capability is evaluated at the Kconfig time. If $(CC) cannot link standalone programs, the relevant options are hidden by 'depends on CC_CAN_LINK'. The implementation just mimics scripts/Makefile.host The userspace programs are compiled with the same flags as the host programs. In addition, it uses -m32 or -m64 if it is found in $(KBUILD_CFLAGS). This new syntax has at least two usecases. - Sample programs Several userspace programs under samples/ include UAPI headers installed in usr/include. Most of them were previously built for the host architecture just to use 'hostprogs' syntax. However, 'make headers' always works for the target architecture. This caused the arch mismatch in cross-compiling. To fix this distortion, sample code should be built for the target architecture. - Bpfilter net/bpfilter/Makefile compiles bpfilter_umh as the user mode helper, and embeds it into the kernel code. Currently, it overrides HOSTCC with CC to use the 'hostprogs' syntax. This hack should go away. [1]: https://mirrors.edge.kernel.org/pub/tools/crosstool/ Signed-off-by: Masahiro Yamada --- Makefile | 11 +++++++--- scripts/Makefile.build | 5 +++++ scripts/Makefile.clean | 2 +- scripts/Makefile.userprogs | 44 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 58 insertions(+), 4 deletions(-) create mode 100644 scripts/Makefile.userprogs diff --git a/Makefile b/Makefile index 49b2709ff44e..f20597820131 100644 --- a/Makefile +++ b/Makefile @@ -406,9 +406,11 @@ else HOSTCC = gcc HOSTCXX = g++ endif -KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ - -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ - $(HOSTCFLAGS) + +export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ + -O2 -fomit-frame-pointer -std=gnu89 + +KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) @@ -937,6 +939,9 @@ ifeq ($(CONFIG_RELR),y) LDFLAGS_vmlinux += --pack-dyn-relocs=relr endif +# Align the bit size of userspace programs with the kernel +KBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) + # make the checker run with the right architecture CHECKFLAGS += --arch=$(ARCH) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 9fcbfac15d1d..94f2f7016172 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -50,6 +50,11 @@ ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),) include scripts/Makefile.host endif +# Do not include userprogs rules unless needed +ifneq ($(userprogs),) +include scripts/Makefile.userprogs +endif + ifndef obj $(warning kbuild: Makefile.build is included improperly) endif diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean index 075f0cc2d8d7..e2c76122319d 100644 --- a/scripts/Makefile.clean +++ b/scripts/Makefile.clean @@ -29,7 +29,7 @@ subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn)) __clean-files := $(extra-y) $(extra-m) $(extra-) \ $(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files) \ - $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \ + $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) $(userprogs) \ $(hostcxxlibs-y) $(hostcxxlibs-m) __clean-files := $(filter-out $(no-clean-files), $(__clean-files)) diff --git a/scripts/Makefile.userprogs b/scripts/Makefile.userprogs new file mode 100644 index 000000000000..0d987085819b --- /dev/null +++ b/scripts/Makefile.userprogs @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Build userspace programs for the target system +# + +userprogs := $(sort $(userprogs)) + +# Executables compiled from a single .c file +user-csingle := $(foreach m, $(userprogs), $(if $($(m)-objs),,$(m))) + +# C executables linked based on several .o files +user-cmulti := $(foreach m, $(userprogs), $(if $($(m)-objs),$(m))) + +# Object (.o) files compiled from .c files +user-cobjs := $(foreach m, $(userprogs), $($(m)-objs)) + +user-csingle := $(addprefix $(obj)/, $(user-csingle)) +user-cmulti := $(addprefix $(obj)/, $(user-cmulti)) +user-cobjs := $(addprefix $(obj)/, $(user-cobjs)) + +user_c_flags = -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(user-ccflags) \ + $($(target-stem)-ccflags) + +# Create an executable from a single .c file +quiet_cmd_user_cc_c = CC [U] $@ + cmd_user_cc_c = $(CC) $(user_c_flags) -o $@ $< +$(user-csingle): $(obj)/%: $(src)/%.c FORCE + $(call if_changed_dep,user_cc_c) + +# Link an executable based on list of .o files +quiet_cmd_user_ld = LD [U] $@ + cmd_user_ld = $(CC) -o $@ $(addprefix $(obj)/, $($(target-stem)-objs)) \ + $($(target-stem)-ldlibs) +$(user-cmulti): FORCE + $(call if_changed,user_ld) +$(call multi_depend, $(user-cmulti), , -objs) + +# Create .o file from a .c file +quiet_cmd_user_cc_o_c = CC [U] $@ + cmd_user_cc_o_c = $(CC) $(user_c_flags) -c -o $@ $< +$(user-cobjs): $(obj)/%.o: $(src)/%.c FORCE + $(call if_changed_dep,user_cc_o_c) + +targets += $(user-csingle) $(user-cmulti) $(user-cobjs) From patchwork Thu Apr 23 07:39:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505207 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 806041392 for ; Thu, 23 Apr 2020 07:41:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5CC29208E4 for ; Thu, 23 Apr 2020 07:41:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627718; bh=Zwe8ywmgwukJ9SoiIbrMmRvto7RWfgYb+g4VjG1HyaQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YNYehg6TedNHhBQn+2SA93/nFisQGJ/1jgTDAKZulyxPdUYzyrJe7FHyvpd0eSmhX tEc3HYF5T7szKqiwuxW2PmFAdrv4sFJHZGbDwJtH1VVQO9VtEZvGEiNT9TqD9xehOt w9Tr14bYHqwRUSt3hUy/iqowCdW9nksSgkbuLFM0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727116AbgDWHli (ORCPT ); Thu, 23 Apr 2020 03:41:38 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:33701 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726790AbgDWHlh (ORCPT ); Thu, 23 Apr 2020 03:41:37 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9P000368; Thu, 23 Apr 2020 16:39:36 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9P000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627577; bh=mNS7qQakks7vv7rluiZ6sy2TT3u/Yp/y0uXOfjW+ff0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vgX24GzV3a5gSzU8pqBzK0uUPmBoq73gXEZoV5t08/+yMcChrq6uP7MLHhdRwGGPc UWKvR0/hvVQCXVFtYvZMmDoPZQ/cwJ9mDXpvEU300Nv0iI9sU5civP4dV2/hkMVLAd FK3BuYRHjhBFQa1B+oUmnNtjb8ARPuZe15DK2bHR9pfUVqUOIyrDpfQwSS0YaEk3Us q6/fi3DlDwocFmaIOowfh119DbojAG/bzBarEoAk6yIvb/41VnjUiic1yir+KsK4p0 yG0QRj3cc7yMSM3LycQICnWyH8UcXZJq1ixs6BeZA2jNqtJYewteyupK7yviIoCJZc GujOc7Bj6SMyA== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , "David S. Miller" , Jakub Kicinski , John Fastabend , KP Singh , Martin KaFai Lau , Song Liu , Yonghong Song , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 04/16] net: bpfilter: use 'userprogs' syntax to build bpfilter_umh Date: Thu, 23 Apr 2020 16:39:17 +0900 Message-Id: <20200423073929.127521-5-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org The user mode helper should be compiled for the same architecture as the kernel. This Makefile reuses the 'hostprogs' syntax by overriding HOSTCC with CC. Now that Kbuild provides the syntax 'userprogs', use it to fix the Makefile mess. Signed-off-by: Masahiro Yamada Reported-by: kbuild test robot --- net/bpfilter/Makefile | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile index 36580301da70..6ee650c6badb 100644 --- a/net/bpfilter/Makefile +++ b/net/bpfilter/Makefile @@ -3,17 +3,14 @@ # Makefile for the Linux BPFILTER layer. # -hostprogs := bpfilter_umh +userprogs := bpfilter_umh bpfilter_umh-objs := main.o -KBUILD_HOSTCFLAGS += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi -HOSTCC := $(CC) +user-ccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi -ifeq ($(CONFIG_BPFILTER_UMH), y) -# builtin bpfilter_umh should be compiled with -static +# builtin bpfilter_umh should be linked with -static # since rootfs isn't mounted at the time of __init # function is called and do_execv won't find elf interpreter -KBUILD_HOSTLDFLAGS += -static -endif +bpfilter_umh-ldflags += -static $(obj)/bpfilter_umh_blob.o: $(obj)/bpfilter_umh From patchwork Thu Apr 23 07:39:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505199 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B4A291392 for ; Thu, 23 Apr 2020 07:41:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A9D121582 for ; Thu, 23 Apr 2020 07:41:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627693; bh=YysVAHTZL2DdRaWv4GzJoGKVNXvuhJPVUeu35nNKt08=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kOI7rVifLJXY/egvPs6EXQtWH91QWUiKes4514PGRPDQwom92A5U+1KaJZ3cSug6Z 72uVq63J+fB8OO2c1D7sPlEPPchX61uqLwpLYtsv2ppZrFabYDYQnv0JwXotFXAOPt 2lkANd+Pc/LCO1pukvijbdowUNCO2bM7dw2+fXvE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727063AbgDWHlS (ORCPT ); Thu, 23 Apr 2020 03:41:18 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:33124 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726924AbgDWHlR (ORCPT ); Thu, 23 Apr 2020 03:41:17 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9Q000368; Thu, 23 Apr 2020 16:39:37 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9Q000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627579; bh=7kgkosREChyr2qCmSzOt/aUBMEboc1zZ/PX0XU3QyZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sKQN27AzEg/soVyiQBKb0WjU8r030CFHBu+V93YqWFAzX21gotLPgG9GNx4G2mxix cXov2Dnt2dBtzW75by16g2pQfhe2GLq8Lpv0W2vBjbx+2FnuUuHXOySYX+Gh5oJPiw vIdnENi7VKVx8SLNf0TZ4viBV3xw7fyQqkFJdMGGCwQaG31iEOm4OdIQW5EkMwIxTr xM75nSIXGexHrJDDm36Sq7gSEMKDDEW+qtnxSqbN/km/xFhH/sqgcziTUs5lzOgS2A Ho+WFVIL/Ep9HcNfhAXEIbN8sErrwfDgCwSahv9Io4vaB/aVtYKZXTDinaIqzSP0Gi 8WzQ/qET/PYfQ== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , John Fastabend , KP Singh , Martin KaFai Lau , Song Liu , Yonghong Song , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 05/16] samples: seccomp: build sample programs for target architecture Date: Thu, 23 Apr 2020 16:39:18 +0900 Message-Id: <20200423073929.127521-6-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org These userspace programs include UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample programs must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. The 'ifndef CROSS_COMPILE' is no longer needed. BTW, the -m31 for s390 is left-over code. Commit 5a79859ae0f3 ("s390: remove 31 bit support") killed it. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 2 +- samples/seccomp/Makefile | 42 +++------------------------------------- 2 files changed, 4 insertions(+), 40 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index 9d236c346de5..8949e9646125 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -126,7 +126,7 @@ config SAMPLE_PIDFD config SAMPLE_SECCOMP bool "Build seccomp sample code" - depends on SECCOMP_FILTER && HEADERS_INSTALL + depends on SECCOMP_FILTER && CC_CAN_LINK && HEADERS_INSTALL help Build samples of seccomp filters using various methods of BPF filter construction. diff --git a/samples/seccomp/Makefile b/samples/seccomp/Makefile index 89279e8b87df..19a7b1125ddf 100644 --- a/samples/seccomp/Makefile +++ b/samples/seccomp/Makefile @@ -1,44 +1,8 @@ # SPDX-License-Identifier: GPL-2.0 -ifndef CROSS_COMPILE -hostprogs := bpf-fancy dropper bpf-direct user-trap +userprogs := bpf-fancy dropper bpf-direct user-trap -HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include -HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include -HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include -HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include bpf-fancy-objs := bpf-fancy.o bpf-helper.o -HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include -HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include -dropper-objs := dropper.o +user-ccflags += -I usr/include -HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include -HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include -bpf-direct-objs := bpf-direct.o - -HOSTCFLAGS_user-trap.o += -I$(objtree)/usr/include -HOSTCFLAGS_user-trap.o += -idirafter $(objtree)/include -user-trap-objs := user-trap.o - -# Try to match the kernel target. -ifndef CONFIG_64BIT - -# s390 has -m31 flag to build 31 bit binaries -ifndef CONFIG_S390 -MFLAG = -m32 -else -MFLAG = -m31 -endif - -HOSTCFLAGS_bpf-direct.o += $(MFLAG) -HOSTCFLAGS_dropper.o += $(MFLAG) -HOSTCFLAGS_bpf-helper.o += $(MFLAG) -HOSTCFLAGS_bpf-fancy.o += $(MFLAG) -HOSTCFLAGS_user-trap.o += $(MFLAG) -HOSTLDLIBS_bpf-direct += $(MFLAG) -HOSTLDLIBS_bpf-fancy += $(MFLAG) -HOSTLDLIBS_dropper += $(MFLAG) -HOSTLDLIBS_user-trap += $(MFLAG) -endif -always-y := $(hostprogs) -endif +always-y := $(userprogs) From patchwork Thu Apr 23 07:39:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505205 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D98B792C for ; Thu, 23 Apr 2020 07:41:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B7114215A4 for ; Thu, 23 Apr 2020 07:41:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627704; bh=PyWVeFPMVi92BVlRHITfj6DAJSS4R4BXs7p+cnGs0Nc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Aeyo7mJ3PpXUZ5rImjEcs/x06ivn+217opYEay8g7BaJn+03ZLolRpOhk0qgsZrMd yZTry7xSjoVoC2XTbKiQSyYdIrQY2c9iDafzVsNsnypK9SqabW5N4k4N24JPS3uusp e/tbjRU+KQ3JqcCJPsEG4UyCbpS7QvUvu6Px7a7k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727783AbgDWHln (ORCPT ); Thu, 23 Apr 2020 03:41:43 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:33795 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727106AbgDWHlk (ORCPT ); Thu, 23 Apr 2020 03:41:40 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9R000368; Thu, 23 Apr 2020 16:39:39 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9R000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627580; bh=2uL21BIwaVwy5ZlKAP5x8RgRo+VUSnEZH7H0mEqmtro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hO1hmCLwP3+43OS/YL2BlKOMgoLKsvHErD+6fZ9YIH5ORyNtfojkuf9yzkE98gMLe WUwSDtd+9JJsfOewpjuZ3oGGjUnhRlXqrSM9Vfz0Rlfr/0r9ds0RCioSwqpXp7auU4 GvrIJfBmbKZx/ED43ZC+Z3257cstL5ZtOaN+WIf22CLY4JdYEkGabC5VdOfVJcZo8f 9V7C2NgOWOqhAhxgGhZ0ncanBbCYde09PghhM4peHQqbOACHDTXQicQncLqmyawpx5 dn0Kl4hW2cWQpOctVKIeXd9nbpZ0gLpDoOmvEul29BIzyY6I0GNuQGfVS8jouPnnCE Zu/BtPRYW2KUQ== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , John Fastabend , Jonathan Corbet , KP Singh , Martin KaFai Lau , Michal Marek , Song Liu , Yonghong Song , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 06/16] kbuild: doc: document the new syntax 'userprogs' Date: Thu, 23 Apr 2020 16:39:19 +0900 Message-Id: <20200423073929.127521-7-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Kbuild now supports the syntax 'userprogs' to compile userspace programs for the same architecture as the kernel. Insert the section '5 Userspace Program support' to explain it. I copy-pasted '4 Host Program support' and fixed it up. Signed-off-by: Masahiro Yamada --- Documentation/kbuild/makefiles.rst | 184 +++++++++++++++++++++-------- 1 file changed, 136 insertions(+), 48 deletions(-) diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst index b80257a03830..251e5431276e 100644 --- a/Documentation/kbuild/makefiles.rst +++ b/Documentation/kbuild/makefiles.rst @@ -29,31 +29,37 @@ This document describes the Linux kernel Makefiles. --- 4.4 Controlling compiler options for host programs --- 4.5 When host programs are actually built - === 5 Kbuild clean infrastructure - - === 6 Architecture Makefiles - --- 6.1 Set variables to tweak the build to the architecture - --- 6.2 Add prerequisites to archheaders: - --- 6.3 Add prerequisites to archprepare: - --- 6.4 List directories to visit when descending - --- 6.5 Architecture-specific boot images - --- 6.6 Building non-kbuild targets - --- 6.7 Commands useful for building a boot image - --- 6.8 Custom kbuild commands - --- 6.9 Preprocessing linker scripts - --- 6.10 Generic header files - --- 6.11 Post-link pass - - === 7 Kbuild syntax for exported headers - --- 7.1 no-export-headers - --- 7.2 generic-y - --- 7.3 generated-y - --- 7.4 mandatory-y - - === 8 Kbuild Variables - === 9 Makefile language - === 10 Credits - === 11 TODO + === 5 Userspace Program support + --- 5.1 Simple Userspace Program + --- 5.2 Composite Userspace Programs + --- 5.3 Controlling compiler options for userspace programs + --- 5.4 When userspace programs are actually built + + === 6 Kbuild clean infrastructure + + === 7 Architecture Makefiles + --- 7.1 Set variables to tweak the build to the architecture + --- 7.2 Add prerequisites to archheaders: + --- 7.3 Add prerequisites to archprepare: + --- 7.4 List directories to visit when descending + --- 7.5 Architecture-specific boot images + --- 7.6 Building non-kbuild targets + --- 7.7 Commands useful for building a boot image + --- 7.8 Custom kbuild commands + --- 7.9 Preprocessing linker scripts + --- 7.10 Generic header files + --- 7.11 Post-link pass + + === 8 Kbuild syntax for exported headers + --- 8.1 no-export-headers + --- 8.2 generic-y + --- 8.3 generated-y + --- 8.4 mandatory-y + + === 9 Kbuild Variables + === 10 Makefile language + === 11 Credits + === 12 TODO 1 Overview ========== @@ -732,7 +738,89 @@ Both possibilities are described in the following. This will tell kbuild to build lxdialog even if not referenced in any rule. -5 Kbuild clean infrastructure +5 Userspace Program support +=========================== + +Just like host programs, Kbuild also supports building userspace executables +for the target architecture (i.e. the same architecture as you are building +the kernel for). + +The syntax is quite similar. The difference is to use "userprogs" instead of +"hostprogs". + +5.1 Simple Userspace Program +---------------------------- + + The following line tells kbuild that the program bpf-direct shall be + built for the target architecture. + + Example:: + + userprogs := bpf-direct + + Kbuild assumes in the above example that bpf-direct is made from a + single C source file named bpf-direct.c located in the same directory + as the Makefile. + +5.2 Composite Userspace Programs +-------------------------------- + + Userspace programs can be made up based on composite objects. + The syntax used to define composite objects for userspace programs is + similar to the syntax used for kernel objects. + $(-objs) lists all objects used to link the final + executable. + + Example:: + + #samples/seccomp/Makefile + userprogs := bpf-fancy + bpf-fancy-objs := bpf-fancy.o bpf-helper.o + + Objects with extension .o are compiled from the corresponding .c + files. In the above example, bpf-fancy.c is compiled to bpf-fancy.o + and bpf-helper.c is compiled to bpf-helper.o. + + Finally, the two .o files are linked to the executable, bpf-fancy. + Note: The syntax -y is not permitted for userspace programs. + +5.3 Controlling compiler options for userspace programs +------------------------------------------------------- + + When compiling userspace programs, it is possible to set specific flags. + The programs will always be compiled utilising $(CC) passed + the options specified in $(KBUILD_USERCFLAGS). + To set flags that will take effect for all userspace programs created + in that Makefile, use the variable user-ccflags. + + Example:: + + # samples/seccomp/Makefile + user-ccflags += -I usr/include + + To set specific flags for a single file the following construction + is used: + + Example:: + + bpf-helper-ccflags += -I user/include + + It is also possible to specify additional options to the linker. + + Example:: + + # net/bpfilter/Makefile + bpfilter_umh-ldflags += -static + + When linking bpfilter_umh-ldflags, it will be passed the extra option + -static. + +5.4 When userspace programs are actually built +---------------------------------------------- + + Same as "When host programs are actually built". + +6 Kbuild clean infrastructure ============================= "make clean" deletes most generated files in the obj tree where the kernel @@ -790,7 +878,7 @@ is not operational at that point. Note 2: All directories listed in core-y, libs-y, drivers-y and net-y will be visited during "make clean". -6 Architecture Makefiles +7 Architecture Makefiles ======================== The top level Makefile sets up the environment and does the preparation, @@ -820,7 +908,7 @@ When kbuild executes, the following steps are followed (roughly): - Preparing initrd images and the like -6.1 Set variables to tweak the build to the architecture +7.1 Set variables to tweak the build to the architecture -------------------------------------------------------- LDFLAGS @@ -967,7 +1055,7 @@ When kbuild executes, the following steps are followed (roughly): KBUILD_VMLINUX_LIBS together specify all the object files used to link vmlinux. -6.2 Add prerequisites to archheaders +7.2 Add prerequisites to archheaders ------------------------------------ The archheaders: rule is used to generate header files that @@ -977,7 +1065,7 @@ When kbuild executes, the following steps are followed (roughly): architecture itself. -6.3 Add prerequisites to archprepare +7.3 Add prerequisites to archprepare ------------------------------------ The archprepare: rule is used to list prerequisites that need to be @@ -995,7 +1083,7 @@ When kbuild executes, the following steps are followed (roughly): generating offset header files. -6.4 List directories to visit when descending +7.4 List directories to visit when descending --------------------------------------------- An arch Makefile cooperates with the top Makefile to define variables @@ -1030,7 +1118,7 @@ When kbuild executes, the following steps are followed (roughly): drivers-$(CONFIG_OPROFILE) += arch/sparc64/oprofile/ -6.5 Architecture-specific boot images +7.5 Architecture-specific boot images ------------------------------------- An arch Makefile specifies goals that take the vmlinux file, compress @@ -1085,7 +1173,7 @@ When kbuild executes, the following steps are followed (roughly): When "make" is executed without arguments, bzImage will be built. -6.6 Building non-kbuild targets +7.6 Building non-kbuild targets ------------------------------- extra-y @@ -1108,7 +1196,7 @@ When kbuild executes, the following steps are followed (roughly): In this example, extra-y is used to list object files that shall be built, but shall not be linked as part of built-in.a. -6.7 Commands useful for building a boot image +7.7 Commands useful for building a boot image --------------------------------------------- Kbuild provides a few macros that are useful when building a @@ -1211,7 +1299,7 @@ When kbuild executes, the following steps are followed (roughly): targets += $(dtb-y) DTC_FLAGS ?= -p 1024 -6.8 Custom kbuild commands +7.8 Custom kbuild commands -------------------------- When kbuild is executing with KBUILD_VERBOSE=0, then only a shorthand @@ -1241,7 +1329,7 @@ When kbuild executes, the following steps are followed (roughly): will be displayed with "make KBUILD_VERBOSE=0". -6.9 Preprocessing linker scripts +7.9 Preprocessing linker scripts -------------------------------- When the vmlinux image is built, the linker script @@ -1274,7 +1362,7 @@ When kbuild executes, the following steps are followed (roughly): The kbuild infrastructure for `*lds` files is used in several architecture-specific files. -6.10 Generic header files +7.10 Generic header files ------------------------- The directory include/asm-generic contains the header files @@ -1283,7 +1371,7 @@ When kbuild executes, the following steps are followed (roughly): to list the file in the Kbuild file. See "7.2 generic-y" for further info on syntax etc. -6.11 Post-link pass +7.11 Post-link pass ------------------- If the file arch/xxx/Makefile.postlink exists, this makefile @@ -1299,7 +1387,7 @@ When kbuild executes, the following steps are followed (roughly): For example, powerpc uses this to check relocation sanity of the linked vmlinux file. -7 Kbuild syntax for exported headers +8 Kbuild syntax for exported headers ------------------------------------ The kernel includes a set of headers that is exported to userspace. @@ -1319,14 +1407,14 @@ A Kbuild file may be defined under arch//include/uapi/asm/ and arch//include/asm/ to list asm files coming from asm-generic. See subsequent chapter for the syntax of the Kbuild file. -7.1 no-export-headers +8.1 no-export-headers --------------------- no-export-headers is essentially used by include/uapi/linux/Kbuild to avoid exporting specific headers (e.g. kvm.h) on architectures that do not support it. It should be avoided as much as possible. -7.2 generic-y +8.2 generic-y ------------- If an architecture uses a verbatim copy of a header from @@ -1356,7 +1444,7 @@ See subsequent chapter for the syntax of the Kbuild file. #include -7.3 generated-y +8.3 generated-y --------------- If an architecture generates other header files alongside generic-y @@ -1370,7 +1458,7 @@ See subsequent chapter for the syntax of the Kbuild file. #arch/x86/include/asm/Kbuild generated-y += syscalls_32.h -7.4 mandatory-y +8.4 mandatory-y --------------- mandatory-y is essentially used by include/(uapi/)asm-generic/Kbuild @@ -1380,7 +1468,7 @@ See subsequent chapter for the syntax of the Kbuild file. in arch/$(ARCH)/include/(uapi/)/asm, Kbuild will automatically generate a wrapper of the asm-generic one. -8 Kbuild Variables +9 Kbuild Variables ================== The top Makefile exports the following variables: @@ -1438,8 +1526,8 @@ The top Makefile exports the following variables: command. -9 Makefile language -=================== +10 Makefile language +==================== The kernel Makefiles are designed to be run with GNU Make. The Makefiles use only the documented features of GNU Make, but they do use many @@ -1458,7 +1546,7 @@ time the left-hand side is used. There are some cases where "=" is appropriate. Usually, though, ":=" is the right choice. -10 Credits +11 Credits ========== - Original version made by Michael Elizabeth Chastain, @@ -1466,7 +1554,7 @@ is the right choice. - Updates by Sam Ravnborg - Language QA by Jan Engelhardt -11 TODO +12 TODO ======= - Describe how kbuild supports shipped files with _shipped. From patchwork Thu Apr 23 07:39:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505215 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9A0AF92C for ; Thu, 23 Apr 2020 07:42:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8217621569 for ; Thu, 23 Apr 2020 07:42:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627731; bh=V3iPccgK+vl/32LMP8x53D6ueRG0X7Rmd/LXz306oiA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YonmIWHvT/qYAPu2i5dyGzuArWnpu3sS/6eh41wAGgTdEDgsh0d1L6MLrIZkkLlRV oXBH5lzL7HNLZersXlwmJ3vXF8Fg6/pzmDl4olmWxbwP8d8RecfG5fgoJfDLKq2B6R Q2uKPwQnc1a0Rh0I3gs4D4yQZqkrelYofa7zK1nI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727821AbgDWHmK (ORCPT ); Thu, 23 Apr 2020 03:42:10 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31739 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726692AbgDWHkb (ORCPT ); Thu, 23 Apr 2020 03:40:31 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9S000368; Thu, 23 Apr 2020 16:39:41 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9S000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627581; bh=YToMVALGZ0JNA1/v+fELxUiPiJLJ9MUFCjYJs4uH7Do=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G/pln6ZqRmDgm/Bssq1alNkuc3Z6L+0VRdRpDBSRfM6rnylBKkpq4N0FhnZAHaBKQ 09d4dGS1RK79D/dxytzaPXHkugwYmcLh0hfnxdlEMCRtGa0CW+r71QZodx9ox2jEGd B/QE/aSCu3/paRvfEhFpPYcJClh8DomUcQgr+0futox9bKYhrpUwpUlQi+BtXI+PTs InMpNzc7xM+x36FYrtaQRwJ4N4i7ESf5cQbZFRxr27525RtaDOwQm4ooWQR0EYsHI0 gLhz3pin+fwgPhwIGuvcIfLLWiUC9iFQLYZ5tpCbhf3MKrJnRgeoaUFpWBhsseUilu 01mlRhbtRxh6g== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 07/16] samples: uhid: fix warnings in uhid-example Date: Thu, 23 Apr 2020 16:39:20 +0900 Message-Id: <20200423073929.127521-8-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org From: Sam Ravnborg Fix warnings seen when building for 32-bit architecture. Use "%xd" for arguments of type size_t to fix the warnings. Signed-off-by: Sam Ravnborg Signed-off-by: Masahiro Yamada --- This is the same as Sam's patch in 2014. https://lkml.org/lkml/2014/7/13/152 samples/uhid/uhid-example.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/samples/uhid/uhid-example.c b/samples/uhid/uhid-example.c index b72d645ce828..015cb06a241e 100644 --- a/samples/uhid/uhid-example.c +++ b/samples/uhid/uhid-example.c @@ -165,7 +165,7 @@ static int uhid_write(int fd, const struct uhid_event *ev) fprintf(stderr, "Cannot write to uhid: %m\n"); return -errno; } else if (ret != sizeof(*ev)) { - fprintf(stderr, "Wrong size written to uhid: %ld != %lu\n", + fprintf(stderr, "Wrong size written to uhid: %zd != %zu\n", ret, sizeof(ev)); return -EFAULT; } else { @@ -236,7 +236,7 @@ static int event(int fd) fprintf(stderr, "Cannot read uhid-cdev: %m\n"); return -errno; } else if (ret != sizeof(ev)) { - fprintf(stderr, "Invalid size read from uhid-dev: %ld != %lu\n", + fprintf(stderr, "Invalid size read from uhid-dev: %zd != %zu\n", ret, sizeof(ev)); return -EFAULT; } From patchwork Thu Apr 23 07:39:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505191 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6649292A for ; Thu, 23 Apr 2020 07:40:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CD6A215A4 for ; Thu, 23 Apr 2020 07:40:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627638; bh=GZvXPXsvlgytFszt3PLwFlNEypRX6C3ezBC1mCEnu88=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KAtpDx9y1ALqAJYvhUk7hLX/zexoJ/A1+GLIJoA7quvfCl37eRxAXjbPdQexhgzIz GOxVTEQ+85OTIZWIt1CfbcmUgE5XtSiAJq6n9BdSS8bqG0J/yo52tS2PtV3+BlHqhf bLvLwvh9ceFBgBHLEYonl+lv3jm9cneCfGbURLlk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726945AbgDWHkh (ORCPT ); Thu, 23 Apr 2020 03:40:37 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31892 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726790AbgDWHkg (ORCPT ); Thu, 23 Apr 2020 03:40:36 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9T000368; Thu, 23 Apr 2020 16:39:41 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9T000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627582; bh=o9sBp4j0KqjJcbGaUiGsj+dJQnRhbxdTQjnG5XWSjQM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SvqVj8FDE575F/ryTgEiKX+nZWGnHNljoUL3kVlWrpvi591++s5VTcqS5QC7HxeZM Que0i8ndSrFgwENSqr0IUw3ua5t3FLTbGDsJMnlVNza96GAdoqL0oixhagL6N6pjns fhtHu1gjQ97jo9weF7sEgvVi81bBIHZG726tesgF8N33IzoDGzwyGNsgz6eymtqvmS Ylolfeurn6JNG5lhE7ctrxhGRATP2XdkYU0oReEYWaTeGg8/JhKPU+zMoOEE8onNfo /ly885V39uu74d1Z0p0oPo0roEJJ7zES6PRk6Qca/W6Rc/nkzUEiOig5g8jqBwwunx irBA3rubBhGwQ== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 08/16] samples: uhid: build sample program for target architecture Date: Thu, 23 Apr 2020 16:39:21 +0900 Message-Id: <20200423073929.127521-9-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This userspace program includes UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample program must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. Add the entry to samples/Makefile to put this into the build bot coverage. I also added the CONFIG option guarded by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 6 ++++++ samples/Makefile | 1 + samples/uhid/.gitignore | 2 ++ samples/uhid/Makefile | 9 +++------ 4 files changed, 12 insertions(+), 6 deletions(-) create mode 100644 samples/uhid/.gitignore diff --git a/samples/Kconfig b/samples/Kconfig index 8949e9646125..ff9126ef1c79 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -131,6 +131,12 @@ config SAMPLE_SECCOMP Build samples of seccomp filters using various methods of BPF filter construction. +config SAMPLE_UHID + bool "Build UHID sample code" + depends on CC_CAN_LINK && HEADERS_INSTALL + help + Build UHID sample program. + config SAMPLE_VFIO_MDEV_MTTY tristate "Build VFIO mtty example mediated device sample code -- loadable modules only" depends on VFIO_MDEV_DEVICE && m diff --git a/samples/Makefile b/samples/Makefile index 5ce50ef0f2b2..bdc168405452 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace_events/ obj-$(CONFIG_SAMPLE_TRACE_PRINTK) += trace_printk/ obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace/ obj-$(CONFIG_SAMPLE_TRACE_ARRAY) += ftrace/ +subdir-$(CONFIG_SAMPLE_UHID) += uhid obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/ obj-y += vfio-mdev/ subdir-$(CONFIG_SAMPLE_VFS) += vfs diff --git a/samples/uhid/.gitignore b/samples/uhid/.gitignore new file mode 100644 index 000000000000..0e0a5a929f5d --- /dev/null +++ b/samples/uhid/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +/uhid-example diff --git a/samples/uhid/Makefile b/samples/uhid/Makefile index 5f44ea40d6d5..1dc58c40298c 100644 --- a/samples/uhid/Makefile +++ b/samples/uhid/Makefile @@ -1,8 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only -# List of programs to build -hostprogs := uhid-example +userprogs := uhid-example +always-y := $(userprogs) -# Tell kbuild to always build the programs -always-y := $(hostprogs) - -HOSTCFLAGS_uhid-example.o += -I$(objtree)/usr/include +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505197 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 37F8392A for ; Thu, 23 Apr 2020 07:41:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 141C021569 for ; Thu, 23 Apr 2020 07:41:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627663; bh=im15wNX38X3WBMZn7zLM7iy+W2/88axSa1j9i6Y8Al4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TZDRJHP08wYtdE9zSX4OkCUXoA4VcSKiIyUr8dei4kbnJEMO42E6kzXZr/PYVYQ0i 2CzxA3+LfyHx89v+dgwbrftMcM56UK0yBlWCHzYmyhpPf8s78obkHp5XA2+mNgJvO2 8wl0zugYRtlixt8MtGQXJrOZ+QoW/Mp1Q4NKGV9s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726832AbgDWHlC (ORCPT ); Thu, 23 Apr 2020 03:41:02 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31893 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726924AbgDWHkh (ORCPT ); Thu, 23 Apr 2020 03:40:37 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9U000368; Thu, 23 Apr 2020 16:39:42 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9U000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627582; bh=kpWIErtGjk+nNiQCQS8fEiXHwNw1IZLOOB6A61EUzm8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VxTjkNLJBDbRlV2i7A0jgoROkuz9K4mzv2x5QFyQWrtJqgp6W4U4oyswxIO+nQAvU iMost6bPmumftTJ2qXqI/QQbWE5nZQjwe1fabqi/cvQYUp3LGs+sIluHW6KAOhvkH3 Hk7hUm5DAjWoX2BpVW2q3iSr20o/+toAXczljOrN7Rqs6R+p+rYKs5/gtIBDAA5EI9 UoW49eQe5Gc/jcf1TBUBoRnTBsFkWNLBFVNNOCOMmNG9soqUZdwy6Pvumr6EyrUYfI cbLdZFfdqk/w45zUF8fS3OKRbFq2r+/Ro/dhWTEVtdh+4efDvd0RaA7KZ6PvLFjKuN ikwwRzJvGnKFQ== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 09/16] samples: hidraw: build sample program for target architecture Date: Thu, 23 Apr 2020 16:39:22 +0900 Message-Id: <20200423073929.127521-10-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This userspace program includes UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample program must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 2 +- samples/hidraw/Makefile | 9 +++------ 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index ff9126ef1c79..2e0ef2cc1aa8 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -118,7 +118,7 @@ config SAMPLE_CONNECTOR config SAMPLE_HIDRAW bool "hidraw sample" - depends on HEADERS_INSTALL + depends on CC_CAN_LINK && HEADERS_INSTALL config SAMPLE_PIDFD bool "pidfd sample" diff --git a/samples/hidraw/Makefile b/samples/hidraw/Makefile index 8bd25f77671f..752ed03cdb64 100644 --- a/samples/hidraw/Makefile +++ b/samples/hidraw/Makefile @@ -1,8 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -# List of programs to build -hostprogs := hid-example -always-y := $(hostprogs) +userprogs := hid-example +always-y := $(userprogs) -HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include - -all: hid-example +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505185 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 38E5192A for ; Thu, 23 Apr 2020 07:40:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 20A5521582 for ; Thu, 23 Apr 2020 07:40:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627632; bh=dCfWx9IcV1rn6JkY7Cg5tKoCV7sIP3ZTz12hKT761zw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gIznCvJy/d+xJzNDopJBALJ4JMaztAhOtCqQ/Cpe+V1jkfyCYY0D8cGht3l8rnR+K fAdXPB8/jieMmRpfNGK2/Ue9z8IAwXmewh1LtL7IBPTLNazoAtMuOiYTPgyjU3BZgf yKmmyIU3BAipDF3OvgwVYphZuslUwmjKkFSSDtCk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726879AbgDWHkb (ORCPT ); Thu, 23 Apr 2020 03:40:31 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31738 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726639AbgDWHkb (ORCPT ); Thu, 23 Apr 2020 03:40:31 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9V000368; Thu, 23 Apr 2020 16:39:43 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9V000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627583; bh=+ykdUqghvT+SxkLRSA1PptHJ5c/3PxPl83bqUUzuoq0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zzsEkYnnSUhsgkWWdxup+egmkkGXuChgkFvnbo28nh6movAmh0a19vX9RLudHudGN RXhNPGbL9tmDct4ww3g70B1dbJd+NhnHTbazIsk83A0Bqjg5Ah8kiEdWqig4OiQuL5 pF+BipcYVCnn7fBNxEppBQB6f4xE6BRYip/cmVaR3TUOIra7CUklxCOpl/iS6cFN5A /lpRBxwwnICmYOnVgha/8fki2DRIT2Cj9OffQvw6WavRfwo+LE7+sWHIwzyUNyN9Ih t065FmDSqhVrxbFKPUf0hG/jSd1QcLgn7e3SR5aFP6ji5GvXH/48gzhfzdT7NbU/66 NdhihN6OBRUQg== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 10/16] samples: connector: build sample program for target architecture Date: Thu, 23 Apr 2020 16:39:23 +0900 Message-Id: <20200423073929.127521-11-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This userspace program includes UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample program must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. $(CC) can always compile cn_text.o since it is the kenrel-space code, but building ucon requires libc. I guarded it by: always-$(CONFIG_CC_CAN_LINK) := $(userprogs) Signed-off-by: Masahiro Yamada --- samples/connector/Makefile | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/samples/connector/Makefile b/samples/connector/Makefile index b785cbde5ffa..7b5117e96fd0 100644 --- a/samples/connector/Makefile +++ b/samples/connector/Makefile @@ -1,13 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o -# List of programs to build -hostprogs := ucon -always-y := $(hostprogs) +userprogs := ucon +always-$(CONFIG_CC_CAN_LINK) := $(userprogs) -HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include - -all: modules - -modules clean: - $(MAKE) -C ../.. M=$(CURDIR) $@ +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505213 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6EBCC92C for ; Thu, 23 Apr 2020 07:42:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DACA21569 for ; Thu, 23 Apr 2020 07:42:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627727; bh=MCdlm1Cwbqqdk9PJI2Rc/okv5yFGjb65OVcf97+CElA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IY4Voyv1+mSABCGO13m4Sy6F+i3795ttksIvHToQkWKOgNSUm5FFzVLFAHcJwHnUG kGAQJzdt6SezQb8j+ca2rJzL73o1efwgbMNhltmZZIzOd9D12L36gpNDH1/y2RNtmx dV+5fddjEojms3An9SSkK0/xZT9iu6v0BXSKfIf4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726790AbgDWHmG (ORCPT ); Thu, 23 Apr 2020 03:42:06 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31737 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725854AbgDWHkb (ORCPT ); Thu, 23 Apr 2020 03:40:31 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9W000368; Thu, 23 Apr 2020 16:39:43 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9W000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627584; bh=IOtkXOaBmjWxmjZkP0pk5es2tQnZPFsfxI9iU204lI0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BAGrgZED1hzAxkrN0HQzkWFMT2ex9n2vQ8G8+5UfudJnj7te6r8Aj7cegBNmyLjZb fWpTYOdDoJ2oOWSjz++TiBdrNdnY0to9blRllHBjAulb/8ccmeRZFcBBt4KwkZxxGg noYGrF3KItotaHsTdaN3HoCzIS+PbII5XO9/1QuZ3ncJP317qbKJwCH0vdfFWlsicJ 3SP7mL4X/LR6NUI1fOmhfCJKR5AwnyHmHR4wORaVomu+deg9nnnQltF/TAOn1kU8fc AkIEVqUwz4piWFHpY+ju8kZ6Cndi5v93nnz1IJ1yAiiKiNDHWwqT6USzg5F/O9e0kA uyu4zvzUx9G5A== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 11/16] samples: vfs: build sample programs for target architecture Date: Thu, 23 Apr 2020 16:39:24 +0900 Message-Id: <20200423073929.127521-12-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org These userspace programs include UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample programs must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 2 +- samples/vfs/Makefile | 11 +++-------- 2 files changed, 4 insertions(+), 9 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index 2e0ef2cc1aa8..b8beb6fd75b4 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -184,7 +184,7 @@ config SAMPLE_ANDROID_BINDERFS config SAMPLE_VFS bool "Build example programs that use new VFS system calls" - depends on HEADERS_INSTALL + depends on CC_CAN_LINK && HEADERS_INSTALL help Build example userspace programs that use new VFS system calls such as mount API and statx(). Note that this is restricted to the x86 diff --git a/samples/vfs/Makefile b/samples/vfs/Makefile index 65acdde5c117..f3831466c1bb 100644 --- a/samples/vfs/Makefile +++ b/samples/vfs/Makefile @@ -1,10 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only -# List of programs to build -hostprogs := \ - test-fsmount \ - test-statx +userprogs := test-fsmount test-statx +always-y := $(userprogs) -always-y := $(hostprogs) - -HOSTCFLAGS_test-fsmount.o += -I$(objtree)/usr/include -HOSTCFLAGS_test-statx.o += -I$(objtree)/usr/include +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505195 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 78CD192A for ; Thu, 23 Apr 2020 07:41:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F1CD21569 for ; Thu, 23 Apr 2020 07:41:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627660; bh=nxZxQhB5VnxVJrH578Orl5TQSsieDYbyp6CM1cqpFt0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jz54kshGTkn9Ho5ZHDvFu+vPtF42NFN8BlbYSh7TV3CNTARzdF0qrC/boCxOlJXn9 +gDQwmWWT6ozMhYhemgPTUF3b1wZyNq2IYfmgQ1fRJe4oniBmCEqd2E2RlBnvHRMF/ rLHihkvG55HTsfAKmSMTB+a6pLsGik9LPQDS4F9I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727009AbgDWHk4 (ORCPT ); Thu, 23 Apr 2020 03:40:56 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31968 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726940AbgDWHkk (ORCPT ); Thu, 23 Apr 2020 03:40:40 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9X000368; Thu, 23 Apr 2020 16:39:44 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9X000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627584; bh=IJ47QMDJ2p1WpT//uXZ9PGqmJ2o4lEX/9JvZFrqoJcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GMapKvhvYs93mGJOYEgVx8fHRRWoSYDTa8VqMlHhDQZPh68juTrwreDLN1IkRkZP/ G1R8k7uj531IyiXkgaFLX8L1RGWKn9vAZZN5FG518KbT81/wouRCI7wXEPbWLWGjLU X27Zr9DIxHkETOdFmqLkzGwSrRTWSnkK+1y//rdBs5jAdRSV/wOubfONQya1HCjYjQ 1+onh9kBCKoVXXyXmkGX1EfoFYRuGSdCzAtWYobu5Jbj5ZVw78waTbmbbkhglfk1xQ a878xIsAH4dC6qJaABNHQAJpTftDmvBKhq0k1BBTtjFMNTMPgvqs4h+yL9AjzPjruc nKOeMmfrccfaw== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Christian Brauner , linux-kernel@vger.kernel.org Subject: [PATCH 12/16] samples: pidfd: build sample program for target architecture Date: Thu, 23 Apr 2020 16:39:25 +0900 Message-Id: <20200423073929.127521-13-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This userspace program includes UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample program must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 2 +- samples/pidfd/Makefile | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index b8beb6fd75b4..b8113555aa6c 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -122,7 +122,7 @@ config SAMPLE_HIDRAW config SAMPLE_PIDFD bool "pidfd sample" - depends on HEADERS_INSTALL + depends on CC_CAN_LINK && HEADERS_INSTALL config SAMPLE_SECCOMP bool "Build seccomp sample code" diff --git a/samples/pidfd/Makefile b/samples/pidfd/Makefile index ee2979849d92..0191902647ca 100644 --- a/samples/pidfd/Makefile +++ b/samples/pidfd/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -hostprogs := pidfd-metadata -always-y := $(hostprogs) -HOSTCFLAGS_pidfd-metadata.o += -I$(objtree)/usr/include -all: pidfd-metadata +usertprogs := pidfd-metadata +always-y := $(userprogs) + +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505201 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8B58392C for ; Thu, 23 Apr 2020 07:41:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68B84215A4 for ; Thu, 23 Apr 2020 07:41:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627696; bh=Hc+cR7zFIF8KR0kcTIamuv9uat6Jpl54qFc4xFE91+U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wND3oslGW5VqnEqUj/DNoTZnkpPnwSfMwfjF9zaI/deSuXfxNnGXyHbBbmCy4qNRZ 8Gs7343zQ8QGw7HaJaxmsiI4MmPNKNkIODJyzN9kR5BP0QozQaZEnmgMEGf37LDBOJ zz/fDRRg736t+rxWmxifG5EcjatA47kIPK7mf2b0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726931AbgDWHkf (ORCPT ); Thu, 23 Apr 2020 03:40:35 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31770 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726854AbgDWHkd (ORCPT ); Thu, 23 Apr 2020 03:40:33 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9Y000368; Thu, 23 Apr 2020 16:39:45 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9Y000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627585; bh=hZ8+fwVp7+ov3O6upNJo7VpVTfDPY/IvaiBo3lVHLJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hqz14zUC1I7SppGewxhPGdV5Rk7+84OzsClwJY3RdIQQyRnlMJt30rTut/FN2RlCw hQtc3eJg9rYrgq2sPR49eaXYxvpFcFghjJZHdmhwDJ0ZzFw5x4yR+IPBHm0nUFkmSr Uaez3b6d1KOI1OK/5qIvoAgIeFaxWe6KXc1WRQS6DcpiTEKxVkiUlGOKbAbgxEJR8o XQVebwL2iIfKzw8eaIbxNVuuq3osVUo6DxBBVE9Qlf0uoIyZCYFs6tOrHUlpiS5azZ 4qMG6K7kuyI8PH+wuerB9lkXzMJVvHDneNys7zjK6BIrX1ph0uO+ADx1lLCN7esx+R 3lEivQ7AxCc5A== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , Tomas Winkler , linux-kernel@vger.kernel.org Subject: [PATCH 13/16] samples: mei: build sample program for target architecture Date: Thu, 23 Apr 2020 16:39:26 +0900 Message-Id: <20200423073929.127521-14-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This userspace program includes UAPI headers exported to usr/include/. 'make headers' always works for the target architecture (i.e. the same architecture as the kernel), so the sample program must be built for the target as well. Kbuild now supports the 'userprogs' syntax to describe it cleanly. I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 1 + samples/mei/Makefile | 9 +++------ 2 files changed, 4 insertions(+), 6 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index b8113555aa6c..b9dafee5d3af 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -193,6 +193,7 @@ config SAMPLE_VFS config SAMPLE_INTEL_MEI bool "Build example program working with intel mei driver" depends on INTEL_MEI + depends on CC_CAN_LINK && HEADERS_INSTALL help Build a sample program to work with mei device. diff --git a/samples/mei/Makefile b/samples/mei/Makefile index f5b9d02be2cd..ced5532cbbee 100644 --- a/samples/mei/Makefile +++ b/samples/mei/Makefile @@ -1,10 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 # Copyright (c) 2012-2019, Intel Corporation. All rights reserved. -hostprogs := mei-amt-version +userprogs := mei-amt-version +always-y := $(userprogs) -HOSTCFLAGS_mei-amt-version.o += -I$(objtree)/usr/include - -always-y := $(hostprogs) - -all: mei-amt-version +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505189 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F076C92C for ; Thu, 23 Apr 2020 07:40:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFA1E215A4 for ; Thu, 23 Apr 2020 07:40:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627635; bh=oX1Yizvm022sZLLTBHMIoLMjSvEhk0YAaF3tm2Z0fOo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NmNCo3ONLKlsh+fb2t4MO7DK3qHPWBzizUsxxaXeDJ+8b5bwvlgvTkOP9ue2JYAxs GJ7Y7bPSeJvvubfIyK8piK76LVLckQLBzoJ2iHPPbutHuc4jTEbIAHP/M+xVZXrU/i /koipvPKTnn83DYnTKpguvsZGKxfpymvAtXUYtBM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726929AbgDWHkf (ORCPT ); Thu, 23 Apr 2020 03:40:35 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31787 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726859AbgDWHkd (ORCPT ); Thu, 23 Apr 2020 03:40:33 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9Z000368; Thu, 23 Apr 2020 16:39:45 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9Z000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627587; bh=hA9zKaYolCBXen9YqFKBxUtOtwyQMnhMjhiUYnYYBtg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j3N5a4M/3pkD919qlPicRMxcgkvR8hut/hs/t+tK7ZIAr2tqSGDEr9LQDf087UNUR kj/A0Oini8KGUWlzLarA0l0peNzA3qLMP8a6KoY3Tr5+0pqBre3p3kajWxLZ23JlHR xEskoeVk0jMj+mBH/pQtpOJ42ck9CFmMP1cRZCUQCnUcAq1yiQum1gcsi7OfQzJJ1r eW+kNQ0WSYt6/1tJa1U3k+uWZiU5cjP5EsmNvhTiwm6aKYnZh7OQSek5cs5Es8BJIo hyG27PQOQ5vcdZHgctN1vhTRTA3naqLyRw6tU1O1kz+8/iVH7Th3hS8OL5jX0HRE28 Pqwc7TTw11xEQ== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 14/16] samples: auxdisplay: use 'userprogs' syntax Date: Thu, 23 Apr 2020 16:39:27 +0900 Message-Id: <20200423073929.127521-15-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Kbuild now supports the 'userprogs' syntax to describe the build rules of userspace programs for the target architecture (i.e. the same architecture as the kernel). Add the entry to samples/Makefile to put this into the build bot coverage. I also added the CONFIG option guarded by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada Acked-by: Miguel Ojeda --- samples/Kconfig | 4 ++++ samples/Makefile | 1 + samples/auxdisplay/Makefile | 11 ++--------- 3 files changed, 7 insertions(+), 9 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index b9dafee5d3af..cdb0091e4734 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -6,6 +6,10 @@ menuconfig SAMPLES if SAMPLES +config SAMPLE_AUXDISPLAY + bool "auxdisplay sample" + depends on CC_CAN_LINK + config SAMPLE_TRACE_EVENTS tristate "Build trace_events examples -- loadable modules only" depends on EVENT_TRACING && m diff --git a/samples/Makefile b/samples/Makefile index bdc168405452..0c43b5d34b15 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for Linux samples code +subdir-$(CONFIG_SAMPLE_AUXDISPLAY) += auxdisplay obj-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs/ obj-$(CONFIG_SAMPLE_CONFIGFS) += configfs/ obj-$(CONFIG_SAMPLE_CONNECTOR) += connector/ diff --git a/samples/auxdisplay/Makefile b/samples/auxdisplay/Makefile index 0273bab27233..dbdf939af94a 100644 --- a/samples/auxdisplay/Makefile +++ b/samples/auxdisplay/Makefile @@ -1,10 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 -CC := $(CROSS_COMPILE)gcc -CFLAGS := -I../../usr/include - -PROGS := cfag12864b-example - -all: $(PROGS) - -clean: - rm -fr $(PROGS) +userprogs := cfag12864b-example +always-y := $(userprogs) From patchwork Thu Apr 23 07:39:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505187 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A05A11392 for ; Thu, 23 Apr 2020 07:40:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 88F2F208E4 for ; Thu, 23 Apr 2020 07:40:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627635; bh=B23+txFWRyEt4Ku0qJ/lndtpZmVXz53GpUKda6/l9G4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cag7x0A0q0H5xv1ADCCwUnE8wJ5krMqYzMdhf/wXi4+/Vn+97Ffu1kWGjNYT6DIs6 H0MUeQPKtDtc3PrI7tF991SmFEicR3AYQSA8FCCY9eNRoIGW0AAIt/hJUYZKm+6iz5 ZAkvrVjI8n3Q3oTUz6Y/id6c3k/lJ6w19dxPlaBo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726925AbgDWHke (ORCPT ); Thu, 23 Apr 2020 03:40:34 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31786 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726032AbgDWHkd (ORCPT ); Thu, 23 Apr 2020 03:40:33 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9a000368; Thu, 23 Apr 2020 16:39:48 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9a000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627588; bh=E2jjP8KPNwvqL0zZwwd3YhfAuKyupQ9yeab/h3FTNEI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U6cu9Enpq+CiCsgRzuKUsbYJAE/NkdzIiiG3eC8D1AK+4ekKSWgVQxk8yPSZ6DCs7 5lY97SjxsY77w3uqmDERaSGyw79uBewjPYTd1VtsM12VYgy9fWPHekRWgnaozoQOA9 /txHor2s8dxdaCPFXweNbWrK+8FKOSH0rcKMw/dW06CmjpulUejvgF8ylM4LSdfJi9 1D/EV78kSCKwg7o1z9fZg98l63n7ySX0Yub4IsdZWOGkI5TnqO11yTV+LwdakdNRYi b1YoNDMqri0o2izM+areu2uEOioxz6ubEoCSBKjeuupYUASWEJSvjsPN1t9LQBcV+S dVFkoMt1ta1rg== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 15/16] samples: timers: use 'userprogs' syntax Date: Thu, 23 Apr 2020 16:39:28 +0900 Message-Id: <20200423073929.127521-16-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Kbuild now supports the 'userprogs' syntax to describe the build rules of userspace programs for the target architecture (i.e. the same architecture as the kernel). Add the entry to samples/Makefile to put this into the build bot coverage. I also added the CONFIG option guarded by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 4 ++++ samples/Makefile | 1 + samples/timers/Makefile | 17 +++-------------- 3 files changed, 8 insertions(+), 14 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index cdb0091e4734..55548a487d3c 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -135,6 +135,10 @@ config SAMPLE_SECCOMP Build samples of seccomp filters using various methods of BPF filter construction. +config SAMPLE_TIMER + bool "Build timer sample code" + depends on CC_CAN_LINK && HEADERS_INSTALL + config SAMPLE_UHID bool "Build UHID sample code" depends on CC_CAN_LINK && HEADERS_INSTALL diff --git a/samples/Makefile b/samples/Makefile index 0c43b5d34b15..042208326689 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -16,6 +16,7 @@ subdir-$(CONFIG_SAMPLE_PIDFD) += pidfd obj-$(CONFIG_SAMPLE_QMI_CLIENT) += qmi/ obj-$(CONFIG_SAMPLE_RPMSG_CLIENT) += rpmsg/ subdir-$(CONFIG_SAMPLE_SECCOMP) += seccomp +subdir-$(CONFIG_SAMPLE_TIMER) += timers obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace_events/ obj-$(CONFIG_SAMPLE_TRACE_PRINTK) += trace_printk/ obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace/ diff --git a/samples/timers/Makefile b/samples/timers/Makefile index f9fa07460802..c5f46e8caa80 100644 --- a/samples/timers/Makefile +++ b/samples/timers/Makefile @@ -1,16 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -ifndef CROSS_COMPILE -uname_M := $(shell uname -m 2>/dev/null || echo not) -ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) +userprogs := hpet_example +always-y := $(userprogs) -ifeq ($(ARCH),x86) -CC := $(CROSS_COMPILE)gcc -PROGS := hpet_example - -all: $(PROGS) - -clean: - rm -fr $(PROGS) - -endif -endif +user-ccflags += -I usr/include From patchwork Thu Apr 23 07:39:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11505211 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 47BA592A for ; Thu, 23 Apr 2020 07:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24BE5208E4 for ; Thu, 23 Apr 2020 07:42:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587627725; bh=K8ruT/zEhi8KdROn+//yCfuuW5Waj10tAAF6Qqs5eqE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FbVfjEqKkHlMzFvXR8JLLIi3W7Oy9s5KDeOntqlK98pUCkyPLK9MF4oVKM74e44O4 sW6TNLjotFvDVBrCXmHjROphjkFqqKg6X662aAD6KN4amgr+mowHSRp6fIIUkuV+k/ MNIuv14WCz4aaQQGfYo6XT0l67X4bMSicXJQufME= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726910AbgDWHkc (ORCPT ); Thu, 23 Apr 2020 03:40:32 -0400 Received: from conuserg-10.nifty.com ([210.131.2.77]:31741 "EHLO conuserg-10.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726790AbgDWHkc (ORCPT ); Thu, 23 Apr 2020 03:40:32 -0400 Received: from oscar.flets-west.jp (softbank126090202047.bbtec.net [126.90.202.47]) (authenticated) by conuserg-10.nifty.com with ESMTP id 03N7dV9b000368; Thu, 23 Apr 2020 16:39:48 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-10.nifty.com 03N7dV9b000368 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1587627589; bh=juTCQEGw4591P2lhPWalVsIydPeVDA5qp/agKloK7wE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A43dIexGcFvYP9YfNPNCCHF4w+RKeD+dIP2P21GFHkODTqk/oaIFyMUiktfLrYO4z 1IpKMFNqHRps7/YzQ26CeKNPn7tL4wiUqTNyDwVlVQzx2MayLGaP4QbSaxhI+W8GyA 0a5zRJ4jeGJ2HakH+TzBvdkc0vdgTdkqH1W34RWSg7i2ehjX6G4yFq4XgTQZBSEOmH RxL1K5eSpGzB1PW6/IAmSfD11OVuTTsuyGRtX2R84dZ9ns7QauXlu3A1iZV4QnTAem NTazxTFumXcWZGqdxKbWImEXd7vnlDuA1WXNApi521AM5A/It8K+JhNLRQaccX76uk xrP0tlIprm2aw== X-Nifty-SrcIP: [126.90.202.47] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: bpf@vger.kernel.org, Sam Ravnborg , Masahiro Yamada , linux-kernel@vger.kernel.org Subject: [PATCH 16/16] samples: watchdog: use 'userprogs' syntax Date: Thu, 23 Apr 2020 16:39:29 +0900 Message-Id: <20200423073929.127521-17-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org> References: <20200423073929.127521-1-masahiroy@kernel.org> MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Kbuild now supports the 'userprogs' syntax to describe the build rules of userspace programs for the target architecture (i.e. the same architecture as the kernel). Add the entry to samples/Makefile to put this into the build bot coverage. I also added the CONFIG option guarded by 'depends on CC_CAN_LINK' because $(CC) may not necessarily provide libc. Signed-off-by: Masahiro Yamada --- samples/Kconfig | 3 +++ samples/Makefile | 1 + samples/watchdog/Makefile | 10 ++-------- 3 files changed, 6 insertions(+), 8 deletions(-) diff --git a/samples/Kconfig b/samples/Kconfig index 55548a487d3c..4aa89d24a19e 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -205,5 +205,8 @@ config SAMPLE_INTEL_MEI help Build a sample program to work with mei device. +config SAMPLE_WATCHDOG + bool "watchdog sample" + depends on CC_CAN_LINK endif # SAMPLES diff --git a/samples/Makefile b/samples/Makefile index 042208326689..29c66aadd954 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -26,3 +26,4 @@ obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/ obj-y += vfio-mdev/ subdir-$(CONFIG_SAMPLE_VFS) += vfs obj-$(CONFIG_SAMPLE_INTEL_MEI) += mei/ +subdir-$(CONFIG_SAMPLE_WATCHDOG) += watchdog diff --git a/samples/watchdog/Makefile b/samples/watchdog/Makefile index a9430fa60253..17384cfb387e 100644 --- a/samples/watchdog/Makefile +++ b/samples/watchdog/Makefile @@ -1,9 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 -CC := $(CROSS_COMPILE)gcc -PROGS := watchdog-simple - -all: $(PROGS) - -clean: - rm -fr $(PROGS) - +userprogs := watchdog-simple +always-y := $(userprogs)