Linux 4.14.5
[linux/fpc-iii.git] / scripts / mkcompile_h
blob959199c3147ec79e2797e0c87cf47b0e03723a25
1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
4 TARGET=$1
5 ARCH=$2
6 SMP=$3
7 PREEMPT=$4
8 CC=$5
10 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
12 # If compile.h exists already and we don't own autoconf.h
13 # (i.e. we're not the same user who did make *config), don't
14 # modify compile.h
15 # So "sudo make install" won't change the "compiled by <user>"
16 # do "compiled by root"
18 if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
19 vecho " SKIPPED $TARGET"
20 exit 0
23 # Do not expand names
24 set -f
26 # Fix the language to get consistent output
27 LC_ALL=C
28 export LC_ALL
30 if [ -z "$KBUILD_BUILD_VERSION" ]; then
31 if [ -r .version ]; then
32 VERSION=`cat .version`
33 else
34 VERSION=0
35 echo 0 > .version
37 else
38 VERSION=$KBUILD_BUILD_VERSION
41 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
42 TIMESTAMP=`date`
43 else
44 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
46 if test -z "$KBUILD_BUILD_USER"; then
47 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
48 else
49 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
51 if test -z "$KBUILD_BUILD_HOST"; then
52 LINUX_COMPILE_HOST=`hostname`
53 else
54 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
57 UTS_VERSION="#$VERSION"
58 CONFIG_FLAGS=""
59 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
60 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
61 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
63 # Truncate to maximum length
65 UTS_LEN=64
66 UTS_TRUNCATE="cut -b -$UTS_LEN"
68 # Generate a temporary compile.h
70 ( echo /\* This file is auto generated, version $VERSION \*/
71 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
73 echo \#define UTS_MACHINE \"$ARCH\"
75 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
77 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
78 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
80 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
81 ) > .tmpcompile
83 # Only replace the real compile.h if the new one is different,
84 # in order to preserve the timestamp and avoid unnecessary
85 # recompilations.
86 # We don't consider the file changed if only the date/time changed.
87 # A kernel config change will increase the generation number, thus
88 # causing compile.h to be updated (including date/time) due to the
89 # changed comment in the
90 # first line.
92 if [ -r $TARGET ] && \
93 grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
94 grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
95 cmp -s .tmpver.1 .tmpver.2; then
96 rm -f .tmpcompile
97 else
98 vecho " UPD $TARGET"
99 mv -f .tmpcompile $TARGET
101 rm -f .tmpver.1 .tmpver.2