diff options
author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-08-08 20:21:11 +0900 |
---|---|---|
committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-08-10 01:45:31 +0900 |
commit | c07d8d47bca1b325102fa2be3a463075f7b051d9 (patch) | |
tree | 4b74298449e30cd5c1526b373bf5bfde0dda4ad9 /Makefile | |
parent | 4f2c8f3089f538f556c86f26603a062865e4aa94 (diff) | |
download | linux-c07d8d47bca1b325102fa2be3a463075f7b051d9.tar.gz linux-c07d8d47bca1b325102fa2be3a463075f7b051d9.tar.bz2 linux-c07d8d47bca1b325102fa2be3a463075f7b051d9.zip |
kbuild: show hint if subdir-y/m is used to visit module Makefile
Since commit ff9b45c55b26 ("kbuild: modpost: read modules.order instead
of $(MODVERDIR)/*.mod"), a module is no longer built in the following
pattern:
[Makefile]
subdir-y := some-module
[some-module/Makefile]
obj-m := some-module.o
You cannot write Makefile this way in upstream because modules.order is
not correctly generated. subdir-y is used to descend to a sub-directory
that builds tools, device trees, etc.
For external modules, the modules order does not matter. So, the
Makefile above was known to work.
I believe the Makefile should be re-written as follows:
[Makefile]
obj-m := some-module/
[some-module/Makefile]
obj-m := some-module.o
However, people will have no idea if their Makefile suddenly stops
working. In fact, I received questions from multiple people.
Show a warning for a while if obj-m is specified in a Makefile visited
by subdir-y or subdir-m.
I touched the %/ rule to avoid false-positive warnings for the single
target.
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Tom Stonecypher <thomas.edwardx.stonecypher@intel.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Diffstat (limited to 'Makefile')
-rw-r--r-- | Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -1788,7 +1788,7 @@ PHONY += / /: ./ %/: prepare FORCE - $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) + $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) need-modorder=1 # FIXME Should go into a make.lib or something # =========================================================================== |