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UPSTREAM: kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro

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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 4831f7ad6c ("kbuild: mkcompile_h:
Include $LD version in /proc/version") added the linker version.

Bug: 168274246

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
(cherry picked from commit 9a95015466)
Signed-off-by: Mars Lin <marslin@google.com>
Change-Id: I66bac5b44bf764e7c0e432ae17bcdf06d79c96d0
This commit is contained in:
Masahiro Yamada
2020-04-23 23:23:54 +09:00
committed by Mars Lin
parent 68aee2bc3d
commit bc93285fae
2 changed files with 2 additions and 3 deletions
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2
init/Makefile
View File

@@ -35,4 +35,4 @@ include/generated/compile.h: FORCE
@$($(quiet)chk_compile.h)
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" \
"$(CONFIG_PREEMPT_RT)" "$(CC)" "$(LD)"
"$(CONFIG_PREEMPT_RT)" $(CONFIG_CC_VERSION_TEXT) "$(LD)"

3
scripts/mkcompile_h
View File

@@ -6,7 +6,7 @@ ARCH=$2
SMP=$3
PREEMPT=$4
PREEMPT_RT=$5
CC=$6
CC_VERSION="$6"
LD=$7
vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
@@ -75,7 +75,6 @@ UTS_TRUNCATE="cut -b -$UTS_LEN"
echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
CC_VERSION=$($CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//')
LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
| sed 's/[[:space:]]*$//')
printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"