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| author |   Masahiro Yamada <masahiroy@kernel.org> | 2022-05-29 13:23:18 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2022-05-29 18:36:41 +0900 |
| commit | 0aa24a79ee3b603f6e6cd470c364edc2d746f613 (patch) | |
| tree | 3777b900aed2768d4e9f44eed1b4bf436df5962d /scripts | |
| parent | kbuild: replace $(if A,A,B) with $(or A,B) in scripts/Makefile.modpost (diff) | |
| download | linux-dev-0aa24a79ee3b603f6e6cd470c364edc2d746f613.tar.xz linux-dev-0aa24a79ee3b603f6e6cd470c364edc2d746f613.zip | |
kbuild: do not try to parse *.cmd files for objects provided by compiler
Guenter Roeck reported the build breakage for parisc and csky.
I confirmed nios2 and openrisc are broken as well.
The reason is that they borrow libgcc.a from the toolchains.
For example, see this line in arch/parisc/Makefile:
LIBGCC := $(shell $(CC) -print-libgcc-file-name)
Some objects in libgcc.a are linked to vmlinux.o, but they do not have
.*.cmd files.
Obviously, there is no EXPORT_SYMBOL in external objects. Ignore them.
(Most of the architectures import library code into the kernel tree.
Perhaps those 4 architectures can do similar, but I do not know how
challenging it is.)
Fixes: f292d875d0dc ("modpost: extract symbol versions from *.cmd files")
Link: https://lore.kernel.org/linux-kbuild/20220528224745.GA2501857@roeck-us.net/T/#mac65c20c71c3e272db0350ecfba53fcd8905b0a0
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/link-vmlinux.sh | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index a7f6196c7e41..68e4be463a76 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -344,9 +344,16 @@ ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1 modpost_link vmlinux.o objtool_link vmlinux.o -# Generate the list of objects in vmlinux +# Generate the list of in-tree objects in vmlinux +# +# This is used to retrieve symbol versions generated by genksyms. for f in ${KBUILD_VMLINUX_OBJS} ${KBUILD_VMLINUX_LIBS}; do case ${f} in + *libgcc.a) + # Some architectures do '$(CC) --print-libgcc-file-name' to + # borrow libgcc.a from the toolchain. + # There is no EXPORT_SYMBOL in external objects. Ignore this. + ;; *.a) ${AR} t ${f} ;; *) |