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author | Masahiro Yamada <masahiroy@kernel.org> | 2021-06-02 23:02:13 +0900 |
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committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-06-17 09:50:59 +0900 |
commit | 74ee585b7eecd98be3650e677625a0ee588d08e0 (patch) | |
tree | e62e213c8cbf35b48322f18149ffd2a902464da6 | |
parent | c7c90e121e992eefdf07945e5a6e9cf097b29463 (diff) | |
download | linux-74ee585b7eecd98be3650e677625a0ee588d08e0.tar.bz2 |
kbuild: remove trailing slashes from $(KBUILD_EXTMOD)
M= (or KBUILD_EXTMOD) generally expects a directory path without any
trailing slashes, like M=a/b/c.
If you add a trailing slash, like M=a/b/c/, you will get ugly build
logs (two slashes in a series), but it still works fine as long as it
is consistent between 'make modules' and 'make modules_install'.
The following commands correctly build and install the modules.
$ make M=a/b/c/ modules
$ sudo make M=a/b/c/ modules_install
Since commit ccae4cfa7bfb ("kbuild: refactor scripts/Makefile.modinst"),
a problem happens if you add a trailing slash only for modules_install.
$ make M=a/b/c modules
$ sudo make M=a/b/c/ modules_install
No module is installed in this case, Johannes Berg reported. [1]
Trim any trailing slashes from $(KBUILD_EXTMOD).
I used the 'dirname' command to remove all the trailing slashes in
case someone adds more slashes like M=a/b/c/////. The Make's built-in
function, $(dir ...) cannot take care of such a case.
[1]: https://lore.kernel.org/lkml/10cc8522b27a051e6a9c3e158a4c4b6414fd04a0.camel@sipsolutions.net/
Fixes: ccae4cfa7bfb ("kbuild: refactor scripts/Makefile.modinst")
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
-rw-r--r-- | Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -129,6 +129,11 @@ endif $(if $(word 2, $(KBUILD_EXTMOD)), \ $(error building multiple external modules is not supported)) +# Remove trailing slashes +ifneq ($(filter %/, $(KBUILD_EXTMOD)),) +KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) +endif + export KBUILD_EXTMOD # Kbuild will save output files in the current working directory. |