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authorMasahiro Yamada <masahiroy@kernel.org>2022-05-29 06:23:18 +0200
committerMasahiro Yamada <masahiroy@kernel.org>2022-05-29 11:36:41 +0200
commit0aa24a79ee3b603f6e6cd470c364edc2d746f613 (patch)
tree3777b900aed2768d4e9f44eed1b4bf436df5962d /scripts/link-vmlinux.sh
parentkbuild: replace $(if A,A,B) with $(or A,B) in scripts/Makefile.modpost (diff)
downloadlinux-0aa24a79ee3b603f6e6cd470c364edc2d746f613.tar.xz
linux-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/link-vmlinux.sh')
-rwxr-xr-xscripts/link-vmlinux.sh9
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} ;;
*)