From patchwork Sat Dec 31 06:41:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 13085965 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECEFDC4167B for ; Sat, 31 Dec 2022 06:42:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231360AbiLaGm2 (ORCPT ); Sat, 31 Dec 2022 01:42:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229551AbiLaGmY (ORCPT ); Sat, 31 Dec 2022 01:42:24 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69A425586; Fri, 30 Dec 2022 22:42:23 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 2FDA9CE19E5; Sat, 31 Dec 2022 06:42:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55F09C43392; Sat, 31 Dec 2022 06:42:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672468939; bh=Qwa4D3ZgQJV7RbwjTglMo37xuB4TaUBPhfzfEDpEJ1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bs41JdsrVkkub8Q3Y0otDXtekhXGSUv3AYLsCbaWhHk2xqyq4fQLRsVebwEJQsDCn rXRKyJrk0q2aG5emQsqh7r8DBH5NBXy+SlIgtiI24vAlJYTtcoet8Dk2wg65GFV2Go D6gs3Ld2j/rwRxT6PbbPuKu/6tBsy1IL6gMKjwHAuPFZQ5NjrbYsbQfhwib2mE6sma +hSK3BgD0ISPkPJiZNWhwTkkRdwn/9lKWC/2BE78a7r1rMr4Ogm/pGeE0jAUowsoX8 HnvAPavf3Lvrfxm+1GmSOXx3JqkcYlAAzjmKLL1sy+4P2q3VhhTQSQlfCYdeWwlHim o8LxSeE73eM/Q== From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Miguel Ojeda , Masahiro Yamada , Alex Gaynor , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Boqun Feng , Gary Guo , Nathan Chancellor , Nick Desaulniers , Nicolas Schier , Tom Rix , Wedson Almeida Filho , llvm@lists.linux.dev, rust-for-linux@vger.kernel.org Subject: [PATCH 1/6] kbuild: specify output names separately for each emission type from rustc Date: Sat, 31 Dec 2022 15:41:58 +0900 Message-Id: <20221231064203.1623793-2-masahiroy@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221231064203.1623793-1-masahiroy@kernel.org> References: <20221231064203.1623793-1-masahiroy@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org In Kbuild, two different rules must not write to the same file, but it happens when compiling rust source files. For example, set CONFIG_SAMPLE_RUST_MINIMAL=m and run the following: $ make -j$(nproc) samples/rust/rust_minimal.o samples/rust/rust_minimal.rsi \ samples/rust/rust_minimal.s samples/rust/rust_minimal.ll [snip] RUSTC [M] samples/rust/rust_minimal.o RUSTC [M] samples/rust/rust_minimal.rsi RUSTC [M] samples/rust/rust_minimal.s RUSTC [M] samples/rust/rust_minimal.ll mv: cannot stat 'samples/rust/rust_minimal.d': No such file or directory make[3]: *** [scripts/Makefile.build:334: samples/rust/rust_minimal.ll] Error 1 make[3]: *** Waiting for unfinished jobs.... mv: cannot stat 'samples/rust/rust_minimal.d': No such file or directory make[3]: *** [scripts/Makefile.build:309: samples/rust/rust_minimal.o] Error 1 mv: cannot stat 'samples/rust/rust_minimal.d': No such file or directory make[3]: *** [scripts/Makefile.build:326: samples/rust/rust_minimal.s] Error 1 make[2]: *** [scripts/Makefile.build:504: samples/rust] Error 2 make[1]: *** [scripts/Makefile.build:504: samples] Error 2 make: *** [Makefile:2008: .] Error 2 The reason for the error is that 4 threads running in parallel creates and renames the same file path, samples/rust/rust_minimal.d. This does not happen when compiling C or assembly files because we explicitly specify the dependency filename by using the preprocessor option, -Wp,-MMD,$(depfile). $(depfile) is a unique path for each target. Currently, rustc is only given --out-dir and the list of emitted types. So, all the rust build rules output the dep-info into the default .d, causing the conflict. Fortunately, the --emit option is able to specify the output path individually, with the form --emit==. Add --emit=dep-info=$(depfile) to the common command part. Also, remove the redundant --out-dir because we specify the output path for each type. The code gets much cleaner because we do not need to rename *.d files. Signed-off-by: Masahiro Yamada Reviewed-by: Miguel Ojeda Tested-by: Miguel Ojeda Reviewed-by: Vincenzo Palazzo --- rust/Makefile | 10 ++++------ scripts/Makefile.build | 14 +++++++------- scripts/Makefile.host | 9 +++------ 3 files changed, 14 insertions(+), 19 deletions(-) diff --git a/rust/Makefile b/rust/Makefile index ff70c4c916f8..0e2a32f4b3e9 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -331,10 +331,9 @@ $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ cmd_rustc_procmacro = \ $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ - --emit=dep-info,link --extern proc_macro \ - --crate-type proc-macro --out-dir $(objtree)/$(obj) \ + --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ + --crate-type proc-macro \ --crate-name $(patsubst lib%.so,%,$(notdir $@)) $<; \ - mv $(objtree)/$(obj)/$(patsubst lib%.so,%,$(notdir $@)).d $(depfile); \ sed -i '/^\#/d' $(depfile) # Procedural macros can only be used with the `rustc` that compiled it. @@ -348,10 +347,9 @@ quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L OBJTREE=$(abspath $(objtree)) \ $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ - --emit=dep-info,obj,metadata --crate-type rlib \ - --out-dir $(objtree)/$(obj) -L$(objtree)/$(obj) \ + --emit=dep-info=$(depfile) --emit=obj=$@ --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ + --crate-type rlib -L$(objtree)/$(obj) \ --crate-name $(patsubst %.o,%,$(notdir $@)) $<; \ - mv $(objtree)/$(obj)/$(patsubst %.o,%,$(notdir $@)).d $(depfile); \ sed -i '/^\#/d' $(depfile) \ $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index a0d5c6cca76d..40de20246e50 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -285,11 +285,11 @@ rust_common_cmd = \ -Zcrate-attr=no_std \ -Zcrate-attr='feature($(rust_allowed_features))' \ --extern alloc --extern kernel \ - --crate-type rlib --out-dir $(obj) -L $(objtree)/rust/ \ - --crate-name $(basename $(notdir $@)) + --crate-type rlib -L $(objtree)/rust/ \ + --crate-name $(basename $(notdir $@)) \ + --emit=dep-info=$(depfile) rust_handle_depfile = \ - mv $(obj)/$(basename $(notdir $@)).d $(depfile); \ sed -i '/^\#/d' $(depfile) # `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit @@ -302,7 +302,7 @@ rust_handle_depfile = \ quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ cmd_rustc_o_rs = \ - $(rust_common_cmd) --emit=dep-info,obj $<; \ + $(rust_common_cmd) --emit=obj=$@ $<; \ $(rust_handle_depfile) $(obj)/%.o: $(src)/%.rs FORCE @@ -310,7 +310,7 @@ $(obj)/%.o: $(src)/%.rs FORCE quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ cmd_rustc_rsi_rs = \ - $(rust_common_cmd) --emit=dep-info -Zunpretty=expanded $< >$@; \ + $(rust_common_cmd) -Zunpretty=expanded $< >$@; \ command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@; \ $(rust_handle_depfile) @@ -319,7 +319,7 @@ $(obj)/%.rsi: $(src)/%.rs FORCE quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ cmd_rustc_s_rs = \ - $(rust_common_cmd) --emit=dep-info,asm $<; \ + $(rust_common_cmd) --emit=asm=$@ $<; \ $(rust_handle_depfile) $(obj)/%.s: $(src)/%.rs FORCE @@ -327,7 +327,7 @@ $(obj)/%.s: $(src)/%.rs FORCE quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ cmd_rustc_ll_rs = \ - $(rust_common_cmd) --emit=dep-info,llvm-ir $<; \ + $(rust_common_cmd) --emit=llvm-ir=$@ $<; \ $(rust_handle_depfile) $(obj)/%.ll: $(src)/%.rs FORCE diff --git a/scripts/Makefile.host b/scripts/Makefile.host index da133780b751..4434cdbf7b8e 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -84,8 +84,8 @@ _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ $(HOSTCFLAGS_$(target-stem).o) _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ $(HOSTCXXFLAGS_$(target-stem).o) -_hostrust_flags = $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ - $(HOSTRUSTFLAGS_$(target-stem)) +hostrust_flags = $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ + $(HOSTRUSTFLAGS_$(target-stem)) --emit=dep-info=$(depfile) # $(objtree)/$(obj) for including generated headers from checkin source files ifeq ($(KBUILD_EXTMOD),) @@ -97,7 +97,6 @@ endif hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags) hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags) -hostrust_flags = $(_hostrust_flags) ##### # Compile programs on the host @@ -149,9 +148,7 @@ $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE # host-rust -> Executable quiet_cmd_host-rust = HOSTRUSTC $@ cmd_host-rust = \ - $(HOSTRUSTC) $(hostrust_flags) --emit=dep-info,link \ - --out-dir=$(obj)/ $<; \ - mv $(obj)/$(target-stem).d $(depfile); \ + $(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<; \ sed -i '/^\#/d' $(depfile) $(host-rust): $(obj)/%: $(src)/%.rs FORCE $(call if_changed_dep,host-rust)