$(obj)/config_data: $(KCONFIG_CONFIG) FORCE
$(call filechk,cat)
+# kheaders_data.tar.xz
$(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz
-quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz
- cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_kheaders.sh $@
-$(obj)/kheaders_data.tar.xz: FORCE
- $(call cmd,genikh)
+quiet_cmd_kheaders_data = GEN $@
+ cmd_kheaders_data = "$<" "$@" "$(obj)/kheaders-srclist" "$(obj)/kheaders-objlist"
+ cmd_kheaders_data_dep = cat $(depfile) >> $(dot-target).cmd; rm -f $(depfile)
-clean-files := kheaders_data.tar.xz kheaders.md5
+define rule_kheaders_data
+ $(call cmd_and_savecmd,kheaders_data)
+ $(call cmd,kheaders_data_dep)
+endef
+
+targets += kheaders_data.tar.xz
+$(obj)/kheaders_data.tar.xz: $(src)/gen_kheaders.sh $(obj)/kheaders-srclist $(obj)/kheaders-objlist $(obj)/kheaders.md5 FORCE
+ $(call if_changed_rule,kheaders_data)
+
+# generated headers in objtree
+#
+# include/generated/utsversion.h is ignored because it is generated
+# after gen_kheaders.sh is executed. (utsversion.h is unneeded for kheaders)
+filechk_kheaders_objlist = \
+ for d in include "arch/$(SRCARCH)/include"; do \
+ find "$${d}/generated" ! -path "include/generated/utsversion.h" -a -name "*.h" -print; \
+ done
+
+$(obj)/kheaders-objlist: FORCE
+ $(call filechk,kheaders_objlist)
+
+# non-generated headers in srctree
+filechk_kheaders_srclist = \
+ for d in include "arch/$(SRCARCH)/include"; do \
+ find "$(srctree)/$${d}" -path "$(srctree)/$${d}/generated" -prune -o -name "*.h" -print; \
+ done
+
+$(obj)/kheaders-srclist: FORCE
+ $(call filechk,kheaders_srclist)
+
+# Some files are symlinks. If symlinks are changed, kheaders_data.tar.xz should
+# be rebuilt.
+filechk_kheaders_md5sum = xargs -r -a $< stat -c %N | md5sum
+
+$(obj)/kheaders.md5: $(obj)/kheaders-srclist FORCE
+ $(call filechk,kheaders_md5sum)
+
+clean-files := kheaders.md5 kheaders-srclist kheaders-objlist
# This script generates an archive consisting of kernel headers
# for CONFIG_IKHEADERS.
set -e
-sfile="$(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=$3
+
+dir=$(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
--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 $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
-
rm -rf "${tmpdir}"
projects / thirdparty / kernel / linux.git / commitdiff
