From patchwork Tue Feb 18 14:28:48 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andi Kleen X-Patchwork-Id: 3671601 Return-Path: X-Original-To: patchwork-linux-kbuild@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 522F5BF13A for ; Tue, 18 Feb 2014 14:38:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7FBE22021E for ; Tue, 18 Feb 2014 14:38:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E11F201FE for ; Tue, 18 Feb 2014 14:38:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756331AbaBROhY (ORCPT ); Tue, 18 Feb 2014 09:37:24 -0500 Received: from mga02.intel.com ([134.134.136.20]:2070 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755992AbaBRO3t (ORCPT ); Tue, 18 Feb 2014 09:29:49 -0500 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 18 Feb 2014 06:29:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,502,1389772800"; d="scan'208";a="485209694" Received: from laut.jf.intel.com (HELO localhost) ([10.23.232.94]) by orsmga002.jf.intel.com with ESMTP; 18 Feb 2014 06:29:48 -0800 Received: by localhost (Postfix, from userid 1000) id F41EA124B08; Tue, 18 Feb 2014 15:29:08 +0100 (CET) From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: sam@ravnborg.org, x86@kernel.org, linux-kbuild@vger.kernel.org, Andi Kleen Subject: [PATCH 10/20] Kbuild, lto: add ld-version and ld-ifversion macros Date: Tue, 18 Feb 2014 15:28:48 +0100 Message-Id: <1392733738-8290-11-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1392733738-8290-1-git-send-email-andi@firstfloor.org> References: <1392733738-8290-1-git-send-email-andi@firstfloor.org> Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Andi Kleen To check the linker version. Used by the LTO makefile. Signed-off-by: Andi Kleen --- Documentation/kbuild/makefiles.txt | 10 ++++++++++ scripts/Kbuild.include | 9 +++++++++ scripts/ld-version.sh | 8 ++++++++ 3 files changed, 27 insertions(+) create mode 100755 scripts/ld-version.sh diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index d567a7c..40d51f3 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -595,6 +595,16 @@ more details, with real examples. #Makefile LDFLAGS_vmlinux += $(call ld-option, -X) + ld-version + ld-version returns the full version number of $(LD), for three + number binutils versions, like the Linux binutils + + ld-ifversion + Check the version number of the $(LD) linker in an if. + + Example: + #Makefile.lto + ifeq ($(call ld-ifversion,-ge,22710001,y),y) === 4 Host Program support diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 547e15d..93a0da2 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -155,6 +155,15 @@ ld-option = $(call try-run,\ # Important: no spaces around options ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) +# ld-version +# Usage: $(call ld-version) +# Note this is mainly for HJ Lu's 3 number binutil versions +ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh) + +# ld-ifversion +# Usage: $(call ld-ifversion, -ge, 22252, y) +ld-ifversion = $(shell [ $(call ld-version) $(1) $(2) ] && echo $(3)) + ###### ### diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh new file mode 100755 index 0000000..198580d --- /dev/null +++ b/scripts/ld-version.sh @@ -0,0 +1,8 @@ +#!/usr/bin/awk -f +# extract linker version number from stdin and turn into single number + { + gsub(".*)", ""); + split($1,a, "."); + print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5]; + exit + }