On Wed, May 7, 2025 at 2:30 PM Vincent Li <vincent.mc.li@xxxxxxxxx> wrote:
>
> Hi,
>
> I tried to build kernel 6.15-rc5 bpf selftests on Loongarch machine
> running Fedora, the bpf test programs seems built ok, but I got
> liburandom_read.so build error below:
>
> LIB liburandom_read.so
>
> /usr/bin/ld: cannot find crtbeginS.o: No such file or directory
>
> /usr/bin/ld: cannot find -lstdc++: No such file or directory
>
> /usr/bin/ld: cannot find -lgcc: No such file or directory
>
> /usr/bin/ld: cannot find -lgcc_s: No such file or directory
>
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
>
> make: *** [Makefile:253:
> /usr/src/linux/tools/testing/selftests/bpf/liburandom_read.so] Error 1
>
> Am I missing gcc tools for Fedora loongarch?
I installed gcc-c++-loongarch64-linux-gnu.loongarch64, now the error
is reduced to
LIB liburandom_read.so
/usr/bin/ld: cannot find -lstdc++: No such file or directory
/usr/bin/ld: cannot find -lgcc_s: No such file or directory
Why is it looking for lstdc++ that seems to be c++ library while
urandom_read_lib1.c urandom_read_lib2.c are not c++ code?
$(OUTPUT)/liburandom_read.so: urandom_read_lib1.c urandom_read_lib2.c
liburandom_read.map
$(call msg,LIB,,$@)
$(Q)$(CLANG) $(CLANG_TARGET_ARCH) \
$(filter-out -static,$(CFLAGS) $(LDFLAGS)) \
$(filter %.c,$^) $(filter-out -static,$(LDLIBS)) \
-Wno-unused-command-line-argument \
-fuse-ld=$(LLD) -Wl,-znoseparate-code -Wl,--build-id=sha1 \
-Wl,--version-script=liburandom_read.map \
-fPIC -shared -o $@
