commit 9a950154668729a472d17b8e307d92e7c60f45f7
author Masahiro Yamada <masahiroy@kernel.org> Thu Apr 23 23:23:54 2020 +0900
committer Masahiro Yamada <masahiroy@kernel.org> Tue May 12 13:28:33 2020 +0900
tree 7cc9c6c7533ac3904ec34897788a88098482d2b6
parent 30a7729771731971839cc969d2a321e6ea7a144b

kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro

scripts/mkcompile_h runs $(CC) just for getting the version string.
Reuse CONFIG_CC_VERSION_TEXT for optimization.

For GCC, this slightly changes the version string. I do not think it
is a big deal as we do not have the defined format for LINUX_COMPILER.
In fact, the recent commit 4dcc9a88448a ("kbuild: mkcompile_h:
Include $LD version in /proc/version") added the linker version.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/mkcompile_h

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 5b80a46..baf3ab8 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -6,7 +6,7 @@
 SMP=$3
 PREEMPT=$4
 PREEMPT_RT=$5
-CC=$6
+CC_VERSION="$6"
 LD=$7
 
 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
@@ -62,7 +62,6 @@
   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:]]*$//')
   LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
 		      | sed 's/[[:space:]]*$//')
   printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"