diff options
Diffstat (limited to 'kernel/gen_kheaders.sh')
| -rwxr-xr-x | kernel/gen_kheaders.sh | 99 |
1 files changed, 25 insertions, 74 deletions
diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh index c9e5dc068e85..896a503dfb29 100755 --- a/kernel/gen_kheaders.sh +++ b/kernel/gen_kheaders.sh @@ -4,79 +4,34 @@ # This script generates an archive consisting of kernel headers # for CONFIG_IKHEADERS. set -e -sfile="$(readlink -f "$0")" -outdir="$(pwd)" tarfile=$1 -tmpdir=$outdir/${tarfile%/*}/.tmp_dir - -dir_list=" -include/ -arch/$SRCARCH/include/ -" - -# Support incremental builds by skipping archive generation -# if timestamps of files being archived are not changed. - -# This block is useful for debugging the incremental builds. -# Uncomment it for debugging. -# if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter; -# else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi -# find $all_dirs -name "*.h" | xargs ls -l > /tmp/ls-$iter - -all_dirs= -if [ "$building_out_of_srctree" ]; then - for d in $dir_list; do - all_dirs="$all_dirs $srctree/$d" - done -fi -all_dirs="$all_dirs $dir_list" - -# include/generated/utsversion.h is ignored because it is generated after this -# script is executed. (utsversion.h is unneeded for kheaders) -# -# When Kconfig regenerates include/generated/autoconf.h, its timestamp is -# updated, but the contents might be still the same. When any CONFIG option is -# changed, Kconfig touches the corresponding timestamp file include/config/*. -# Hence, the md5sum detects the configuration change anyway. We do not need to -# check include/generated/autoconf.h explicitly. -# -# Ignore them for md5 calculation to avoid pointless regeneration. -headers_md5="$(find $all_dirs -name "*.h" -a \ - ! -path include/generated/utsversion.h -a \ - ! -path include/generated/autoconf.h | - xargs ls -l | md5sum | cut -d ' ' -f1)" - -# Any changes to this script will also cause a rebuild of the archive. -this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)" -if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi -if [ -f kernel/kheaders.md5 ] && - [ "$(head -n 1 kernel/kheaders.md5)" = "$headers_md5" ] && - [ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ] && - [ "$(tail -n 1 kernel/kheaders.md5)" = "$tarfile_md5" ]; then - exit -fi - -echo " GEN $tarfile" +srclist=$2 +objlist=$3 +timestamp=$4 + +dir=$(dirname "${tarfile}") +tmpdir=${dir}/.tmp_dir +depfile=${dir}/.$(basename "${tarfile}").d + +# generate dependency list. +{ + echo + echo "deps_${tarfile} := \\" + sed 's:\(.*\): \1 \\:' "${srclist}" + sed -n '/^include\/generated\/autoconf\.h$/!s:\(.*\): \1 \\:p' "${objlist}" + echo + echo "${tarfile}: \$(deps_${tarfile})" + echo + echo "\$(deps_${tarfile}):" + +} > "${depfile}" rm -rf "${tmpdir}" mkdir "${tmpdir}" -if [ "$building_out_of_srctree" ]; then - ( - cd $srctree - for f in $dir_list - do find "$f" -name "*.h"; - done | tar -c -f - -T - | tar -xf - -C "${tmpdir}" - ) -fi - -for f in $dir_list; - do find "$f" -name "*.h"; -done | tar -c -f - -T - | tar -xf - -C "${tmpdir}" - -# Always exclude include/generated/utsversion.h -# Otherwise, the contents of the tarball may vary depending on the build steps. -rm -f "${tmpdir}/include/generated/utsversion.h" +# shellcheck disable=SC2154 # srctree is passed as an env variable +sed "s:^${srctree}/::" "${srclist}" | ${TAR} -c -f - -C "${srctree}" -T - | ${TAR} -xf - -C "${tmpdir}" +${TAR} -c -f - -T "${objlist}" | ${TAR} -xf - -C "${tmpdir}" # Remove comments except SDPX lines # Use a temporary file to store directory contents to prevent find/xargs from @@ -88,12 +43,8 @@ xargs -0 -P8 -n1 \ rm -f "${tmpdir}.contents.txt" # Create archive and try to normalize metadata for reproducibility. -tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \ +${TAR} "${timestamp:+--mtime=$timestamp}" \ --owner=0 --group=0 --sort=name --numeric-owner --mode=u=rw,go=r,a+X \ - -I $XZ -cf $tarfile -C "${tmpdir}/" . > /dev/null - -echo $headers_md5 > kernel/kheaders.md5 -echo "$this_file_md5" >> kernel/kheaders.md5 -echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5 + -I "${XZ}" -cf "${tarfile}" -C "${tmpdir}/" . > /dev/null rm -rf "${tmpdir}" |