linux-kernel - [PATCH] kbuild: compile_h: fix compiler version detection with clang

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Message-ID: <87imgykunh.fsf@m5Zedd9JOGzJrf0>
Date:   Thu, 14 May 2020 23:19:05 +0100
From:   Yuxuan Shui <yshuiv7@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     masahiroy@...nel.org, michal.lkml@...kovi.net,
        linux-kbuild@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: [PATCH] kbuild: compile_h: fix compiler version detection with clang


In some setup clang will print a line about CUDA version it detects,
like this:

    Found CUDA installation: /opt/cuda, version 10.1

So grepping ' version ' matches 2 lines, and results in a broken string in
compiler.h, which doesn't compile.

This commit adds a "head -n1" to fix this problem.

Signed-off-by: Yuxuan Shui <yshuiv7@...il.com>
---
 scripts/mkcompile_h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 5b80a4699740..8e6b4fc6fdd9 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -62,7 +62,7 @@ UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
   printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
   echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"

-  CC_VERSION=$($CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//')
+  CC_VERSION=$($CC -v 2>&1 | grep ' version ' | head -n1 | sed 's/[[:space:]]*$//')
   LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
 		      | sed 's/[[:space:]]*$//')
   printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"
--
2.26.2

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