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authorMasahiro Yamada <masahiroy@kernel.org>2022-09-24 21:19:14 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-10-02 12:04:05 +0300
commit3216484550610470013b7ce1c9ed272da0a74589 (patch)
treee24e7df02e90b7e798ae5aa67a5e4468142978c8 /scripts/clang-tools
parent4b0986590062ce12c134c00cf32b9f9b846aeff5 (diff)
downloadlinux-3216484550610470013b7ce1c9ed272da0a74589.tar.xz
kbuild: use obj-y instead extra-y for objects placed at the head
The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to 'scripts/clang-tools')
-rwxr-xr-xscripts/clang-tools/gen_compile_commands.py19
1 files changed, 1 insertions, 18 deletions
diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py
index 47da25b3ba7d..d800b2c0af97 100755
--- a/scripts/clang-tools/gen_compile_commands.py
+++ b/scripts/clang-tools/gen_compile_commands.py
@@ -109,20 +109,6 @@ def to_cmdfile(path):
return os.path.join(dir, '.' + base + '.cmd')
-def cmdfiles_for_o(obj):
- """Generate the iterator of .cmd files associated with the object
-
- Yield the .cmd file used to build the given object
-
- Args:
- obj: The object path
-
- Yields:
- The path to .cmd file
- """
- yield to_cmdfile(obj)
-
-
def cmdfiles_for_a(archive, ar):
"""Generate the iterator of .cmd files associated with the archive.
@@ -211,13 +197,10 @@ def main():
for path in paths:
# If 'path' is a directory, handle all .cmd files under it.
# Otherwise, handle .cmd files associated with the file.
- # Most of built-in objects are linked via archives (built-in.a or lib.a)
- # but some objects are linked to vmlinux directly.
+ # built-in objects are linked via vmlinux.a
# Modules are listed in modules.order.
if os.path.isdir(path):
cmdfiles = cmdfiles_in_dir(path)
- elif path.endswith('.o'):
- cmdfiles = cmdfiles_for_o(path)
elif path.endswith('.a'):
cmdfiles = cmdfiles_for_a(path, ar)
elif path.endswith('modules.order'):