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| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-10 10:34:33 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-28 08:10:23 +0900 |
| commit | 13b25489b6f8bd73ed65f07928f7c27a481f1820 (patch) | |
| tree | e9812994c22644da000e94af4c2e343101b469de /rust | |
| parent | d17113601909eb43c29cbb3449fd49db427ff6be (diff) | |
| download | lwn-13b25489b6f8bd73ed65f07928f7c27a481f1820.tar.gz lwn-13b25489b6f8bd73ed65f07928f7c27a481f1820.zip | |
kbuild: change working directory to external module directory with M=
Currently, Kbuild always operates in the output directory of the kernel,
even when building external modules. This increases the risk of external
module Makefiles attempting to write to the kernel directory.
This commit switches the working directory to the external module
directory, allowing the removal of the $(KBUILD_EXTMOD)/ prefix from
some build artifacts.
The command for building external modules maintains backward
compatibility, but Makefiles that rely on working in the kernel
directory may break. In such cases, $(objtree) and $(srctree) should
be used to refer to the output and source directories of the kernel.
The appearance of the build log will change as follows:
[Before]
$ make -C /path/to/my/linux M=/path/to/my/externel/module
make: Entering directory '/path/to/my/linux'
CC [M] /path/to/my/externel/module/helloworld.o
MODPOST /path/to/my/externel/module/Module.symvers
CC [M] /path/to/my/externel/module/helloworld.mod.o
CC [M] /path/to/my/externel/module/.module-common.o
LD [M] /path/to/my/externel/module/helloworld.ko
make: Leaving directory '/path/to/my/linux'
[After]
$ make -C /path/to/my/linux M=/path/to/my/externel/module
make: Entering directory '/path/to/my/linux'
make[1]: Entering directory '/path/to/my/externel/module'
CC [M] helloworld.o
MODPOST Module.symvers
CC [M] helloworld.mod.o
CC [M] .module-common.o
LD [M] helloworld.ko
make[1]: Leaving directory '/path/to/my/externel/module'
make: Leaving directory '/path/to/my/linux'
Printing "Entering directory" twice is cumbersome. This will be
addressed later.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Diffstat (limited to 'rust')
| -rw-r--r-- | rust/Makefile | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/rust/Makefile b/rust/Makefile index b5e0a73b78f3..742740816c4b 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -362,8 +362,8 @@ rust-analyzer: $(Q)$(srctree)/scripts/generate_rust_analyzer.py \ --cfgs='core=$(core-cfgs)' --cfgs='alloc=$(alloc-cfgs)' \ $(realpath $(srctree)) $(realpath $(objtree)) \ - $(rustc_sysroot) $(RUST_LIB_SRC) $(KBUILD_EXTMOD) > \ - $(if $(KBUILD_EXTMOD),$(extmod_prefix),$(objtree))/rust-project.json + $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ + > rust-project.json redirect-intrinsics = \ __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ |