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authorMasahiro Yamada <masahiroy@kernel.org>2022-10-27 19:28:39 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-10-28 08:55:51 +0300
commitfb3041d61f6867158088c627c2790f94e208d1ea (patch)
tree7050f70fd3a36a6388927ca77362d16fc8058366
parent3b1e0dd2dc8a280b1e89c0df6d38cd28768575a5 (diff)
downloadlinux-fb3041d61f6867158088c627c2790f94e208d1ea.tar.xz
kbuild: fix SIGPIPE error message for AR=gcc-ar and AR=llvm-ar
Jiri Slaby reported that building the kernel with AR=gcc-ar shows: /usr/bin/ar terminated with signal 13 [Broken pipe] Nathan Chancellor reported the latest AR=llvm-ar shows: error: write on a pipe with no reader The latter occurs since LLVM commit 51b557adc131 ("Add an error message to the default SIGPIPE handler"). The resulting vmlinux is correct, but it is better to silence it. 'head -n1' exits after reading the first line, so the pipe is closed. Use 'sed -n 1p' to eat the stream till the end. Fixes: 321648455061 ("kbuild: use obj-y instead extra-y for objects placed at the head") Link: https://github.com/ClangBuiltLinux/linux/issues/1651 Reported-by: Jiri Slaby <jirislaby@kernel.org> Reported-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <nathan@kernel.org>
-rw-r--r--Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index e90bb2b38607..e9e7eff906a5 100644
--- a/Makefile
+++ b/Makefile
@@ -1218,7 +1218,7 @@ quiet_cmd_ar_vmlinux.a = AR $@
cmd_ar_vmlinux.a = \
rm -f $@; \
$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
- $(AR) mPiT $$($(AR) t $@ | head -n1) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
+ $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
targets += vmlinux.a
vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE