# git rev-parse -q --verify 1ea5dd72a4c6abc472b25736ecc35a896fc95735^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-kbuild.git for-next
# git rev-parse -q --verify 1ea5dd72a4c6abc472b25736ecc35a896fc95735^{commit}
1ea5dd72a4c6abc472b25736ecc35a896fc95735
# git checkout -q -f -B kisskb 1ea5dd72a4c6abc472b25736ecc35a896fc95735
# git clean -qxdf
# < git log -1
# commit 1ea5dd72a4c6abc472b25736ecc35a896fc95735
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Sat Jan 28 18:24:23 2023 +0900
# 
#     kbuild: remove --include-dir MAKEFLAG from top Makefile
#     
#     I added $(srctree)/ to some included Makefiles in the following commits:
#     
#      - 3204a7fb98a3 ("kbuild: prefix $(srctree)/ to some included Makefiles")
#      - d82856395505 ("kbuild: do not require sub-make for separate output tree builds")
#     
#     They were a preparation for removing --include-dir flag.
#     
#     I have never thought --include-dir useful. Rather, it _is_ harmful.
#     
#     For example, run the following commands:
#     
#       $ make -s ARCH=x86 mrproper defconfig
#       $ make ARCH=arm O=foo dtbs
#       make[1]: Entering directory '/tmp/linux/foo'
#         HOSTCC  scripts/basic/fixdep
#       Error: kernelrelease not valid - run 'make prepare' to update it
#         UPD     include/config/kernel.release
#       make[1]: Leaving directory '/tmp/linux/foo'
#     
#     The first command configures the source tree for x86. The next command
#     tries to build ARM device trees in the separate foo/ directory - this
#     must stop because the directory foo/ has not been configured yet.
#     
#     However, due to --include-dir=$(abs_srctree), the top Makefile includes
#     the wrong include/config/auto.conf from the source tree and continues
#     building. Kbuild traverses the directory tree, but of course it does
#     not work correctly. The Error message is also pointless - 'make prepare'
#     does not help at all for fixing the issue.
#     
#     This commit fixes more arch Makefile, and finally removes --include-dir
#     from the top Makefile.
#     
#     There are more breakages under drivers/, but I do not volunteer to fix
#     them all. I just moved --include-dir to drivers/Makefile.
#     
#     With this commit, the second command will stop with a sensible message.
#     
#       $ make -s ARCH=x86 mrproper defconfig
#       $ make ARCH=arm O=foo dtbs
#       make[1]: Entering directory '/tmp/linux/foo'
#         SYNC    include/config/auto.conf.cmd
#       ***
#       *** The source tree is not clean, please run 'make ARCH=arm mrproper'
#       *** in /tmp/linux
#       ***
#       make[2]: *** [../Makefile:646: outputmakefile] Error 1
#       /tmp/linux/Makefile:770: include/config/auto.conf.cmd: No such file or directory
#       make[1]: *** [/tmp/linux/Makefile:793: include/config/auto.conf.cmd] Error 2
#       make[1]: Leaving directory '/tmp/linux/foo'
#       make: *** [Makefile:226: __sub-make] Error 2
#     
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-ld --version
# < git log --format=%s --max-count=1 1ea5dd72a4c6abc472b25736ecc35a896fc95735
# < make -s -j 160 ARCH=m68k O=/kisskb/build/kbuild_m68k-defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-  defconfig
# < make -s -j 160 ARCH=m68k O=/kisskb/build/kbuild_m68k-defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-  help
# make -s -j 160 ARCH=m68k O=/kisskb/build/kbuild_m68k-defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-  olddefconfig
# make -s -j 160 ARCH=m68k O=/kisskb/build/kbuild_m68k-defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_m68k-defconfig_m68k-gcc11
# Build took: 0:05:23.031147