[mirror_ubuntu-bionic-kernel.git] / scripts / mkcompile_h

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0

TARGET=$1
ARCH=$2
SMP=$3
PREEMPT=$4
CC=$5

vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }

# If compile.h exists already and we don't own autoconf.h
# (i.e. we're not the same user who did make *config), don't
# modify compile.h
# So "sudo make install" won't change the "compiled by <user>"
# do "compiled by root"

if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
  vecho "  SKIPPED $TARGET"
  exit 0
fi

# 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
UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"

# Truncate to maximum length

UTS_LEN=64
UTS_TRUNCATE="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 \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"

  echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
  echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"

  echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
) > .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
Commit	Line	Data
	1	#!/bin/sh
	2	# SPDX-License-Identifier: GPL-2.0
	3
	4	TARGET=$1
	5	ARCH=$2
	6	SMP=$3
	7	PREEMPT=$4
	8	CC=$5
	9
	10	vecho() { [ "${quiet}" = "silent_" ] \|\| echo "$@" ; }
	11
	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"
	17
	18	if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
	19	vecho " SKIPPED $TARGET"
	20	exit 0
	21	fi
	22
	23	# Do not expand names
	24	set -f
	25
	26	# Fix the language to get consistent output
	27	LC_ALL=C
	28	export LC_ALL
	29
	30	if [ -z "$KBUILD_BUILD_VERSION" ]; then
	31	VERSION=$(cat .version 2>/dev/null \|\| echo 1)
	32	else
	33	VERSION=$KBUILD_BUILD_VERSION
	34	fi
	35
	36	if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
	37	TIMESTAMP=`date`
	38	else
	39	TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
	40	fi
	41	if test -z "$KBUILD_BUILD_USER"; then
	42	LINUX_COMPILE_BY=$(whoami \| sed 's/\\/\\\\/')
	43	else
	44	LINUX_COMPILE_BY=$KBUILD_BUILD_USER
	45	fi
	46	if test -z "$KBUILD_BUILD_HOST"; then
	47	LINUX_COMPILE_HOST=`hostname`
	48	else
	49	LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
	50	fi
	51
	52	UTS_VERSION="#$VERSION"
	53	CONFIG_FLAGS=""
	54	if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
	55	if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
	56	UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
	57
	58	# Truncate to maximum length
	59
	60	UTS_LEN=64
	61	UTS_TRUNCATE="cut -b -$UTS_LEN"
	62
	63	# Generate a temporary compile.h
	64
	65	( echo /\* This file is auto generated, version $VERSION \*/
	66	if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
	67
	68	echo \#define UTS_MACHINE \"$ARCH\"
	69
	70	echo \#define UTS_VERSION \"`echo $UTS_VERSION \| $UTS_TRUNCATE`\"
	71
	72	echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY \| $UTS_TRUNCATE`\"
	73	echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST \| $UTS_TRUNCATE`\"
	74
	75	echo \#define LINUX_COMPILER \"`$CC -v 2>&1 \| grep ' version ' \| sed 's/[[:space:]]*$//'`\"
	76	) > .tmpcompile
	77
	78	# Only replace the real compile.h if the new one is different,
	79	# in order to preserve the timestamp and avoid unnecessary
	80	# recompilations.
	81	# We don't consider the file changed if only the date/time changed.
	82	# A kernel config change will increase the generation number, thus
	83	# causing compile.h to be updated (including date/time) due to the
	84	# changed comment in the
	85	# first line.
	86
	87	if [ -r $TARGET ] && \
	88	grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
	89	grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
	90	cmp -s .tmpver.1 .tmpver.2; then
	91	rm -f .tmpcompile
	92	else
	93	vecho " UPD $TARGET"
	94	mv -f .tmpcompile $TARGET
	95	fi
	96	rm -f .tmpver.1 .tmpver.2