mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 18:24:14 +08:00
9a95015466
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 4dcc9a8844 ("kbuild: mkcompile_h:
Include $LD version in /proc/version") added the linker version.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
89 lines
2.3 KiB
Bash
Executable File
89 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
TARGET=$1
|
|
ARCH=$2
|
|
SMP=$3
|
|
PREEMPT=$4
|
|
PREEMPT_RT=$5
|
|
CC_VERSION="$6"
|
|
LD=$7
|
|
|
|
vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
|
|
|
|
# Do not expand names
|
|
set -f
|
|
|
|
# Fix the language to get consistent output
|
|
LC_ALL=C
|
|
export LC_ALL
|
|
|
|
if [ -z "$KBUILD_BUILD_VERSION" ]; then
|
|
VERSION=$(cat .version 2>/dev/null || echo 1)
|
|
else
|
|
VERSION=$KBUILD_BUILD_VERSION
|
|
fi
|
|
|
|
if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
|
|
TIMESTAMP=`date`
|
|
else
|
|
TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
|
|
fi
|
|
if test -z "$KBUILD_BUILD_USER"; then
|
|
LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
|
|
else
|
|
LINUX_COMPILE_BY=$KBUILD_BUILD_USER
|
|
fi
|
|
if test -z "$KBUILD_BUILD_HOST"; then
|
|
LINUX_COMPILE_HOST=`hostname`
|
|
else
|
|
LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
|
|
fi
|
|
|
|
UTS_VERSION="#$VERSION"
|
|
CONFIG_FLAGS=""
|
|
if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
|
|
if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
|
|
if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi
|
|
|
|
# Truncate to maximum length
|
|
UTS_LEN=64
|
|
UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
|
|
|
|
# Generate a temporary compile.h
|
|
|
|
{ echo /\* This file is auto generated, version $VERSION \*/
|
|
if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
|
|
|
|
echo \#define UTS_MACHINE \"$ARCH\"
|
|
|
|
echo \#define UTS_VERSION \"$UTS_VERSION\"
|
|
|
|
printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
|
|
echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"
|
|
|
|
LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
|
|
| sed 's/[[:space:]]*$//')
|
|
printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"
|
|
} > .tmpcompile
|
|
|
|
# Only replace the real compile.h if the new one is different,
|
|
# in order to preserve the timestamp and avoid unnecessary
|
|
# recompilations.
|
|
# We don't consider the file changed if only the date/time changed.
|
|
# A kernel config change will increase the generation number, thus
|
|
# causing compile.h to be updated (including date/time) due to the
|
|
# changed comment in the
|
|
# first line.
|
|
|
|
if [ -r $TARGET ] && \
|
|
grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
|
|
grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
|
|
cmp -s .tmpver.1 .tmpver.2; then
|
|
rm -f .tmpcompile
|
|
else
|
|
vecho " UPD $TARGET"
|
|
mv -f .tmpcompile $TARGET
|
|
fi
|
|
rm -f .tmpver.1 .tmpver.2
|