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Sam Ravnborg bd5bdd875b kbuild: "PREEMPT" in UTS_VERSION

From: Matt Mackall <mpm@selenic.com>

Add PREEMPT to UTS_VERSION where enabled as is done for SMP to make
preempt kernels easily identifiable.
Added SMP PREEMPT as comment in compile.h to force it to be
updated when they change (sam).

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

2005-07-14 20:18:07 +00:00

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

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 "

do "compiled by root"

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

Do not expand names

set -f

if [ -r .version ]; then VERSION=cat .version else VERSION=0 echo 0 > .version 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 LC_ALL=C LANG=C date"

Truncate to maximum length

UTS_LEN=64 UTS_TRUNCATE="sed -e s/.\{1,$UTS_LEN\}.*/\1/"

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_TIME "LC_ALL=C LANG=C date +%T" echo #define LINUX_COMPILE_BY "whoami" echo #define LINUX_COMPILE_HOST "hostname | $UTS_TRUNCATE"

if [ -x /bin/dnsdomainname ]; then echo #define LINUX_COMPILE_DOMAIN "dnsdomainname | $UTS_TRUNCATE" elif [ -x /bin/domainname ]; then echo #define LINUX_COMPILE_DOMAIN "domainname | $UTS_TRUNCATE" else echo #define LINUX_COMPILE_DOMAIN fi

echo #define LINUX_COMPILER "$CC -v 2>&1 | tail -n 1" ) > .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|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 &&
grep -v 'UTS_VERSION|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 &&
cmp -s .tmpver.1 .tmpver.2; then rm -f .tmpcompile else echo " UPD $TARGET" mv -f .tmpcompile $TARGET fi rm -f .tmpver.1 .tmpver.2

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