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| author | Masahiro Yamada <masahiroy@kernel.org> | 2023-01-28 18:24:23 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-02-05 18:51:22 +0900 |
| commit | 67d7c3023a672c2b73d19d6d23684df670fce648 (patch) | |
| tree | af506c3836b71368617d040c21cf53e83674e299 /drivers/Makefile | |
| parent | feb113ad8be1bafcd0a3b93bae639be939af563c (diff) | |
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>
Diffstat (limited to 'drivers/Makefile')
| -rw-r--r-- | drivers/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/Makefile b/drivers/Makefile index bdf1c66141c9..62a9cb403a1a 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -6,6 +6,11 @@ # Rewritten to use lists instead of if-statements. # +# Some driver Makefiles miss $(srctree)/ for include directive. +ifdef building_out_of_srctree +MAKEFLAGS += --include-dir=$(srctree) +endif + obj-y += irqchip/ obj-y += bus/ |