Failed to compile shared library

[zhangzhimin]

base) ➜  build_debug git:(preview) ✗ make cpuinfo
Consolidate compiler generated dependencies of target cpuinfo
[  0%] Linking C shared library ../../lib/libcpuinfo.so
/usr/bin/ld: CMakeFiles/cpuinfo.dir/src/init.c.o: in function `cpuinfo_initialize':
/home/zhimin/Projects/Matazure/galois/third_party/cpuinfo/src/init.c:30: undefined reference to `cpuinfo_x86_linux_init'
/usr/bin/ld: CMakeFiles/cpuinfo.dir/src/init.c.o: relocation R_X86_64_PC32 against undefined hidden symbol `cpuinfo_x86_linux_init' can not be used when making a shared object
/usr/bin/ld: final link failed: bad value
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [third_party/cpuinfo/CMakeFiles/cpuinfo.dir/build.make:145: lib/libcpuinfo.so] Error 1
make[2]: *** [CMakeFiles/Makefile2:55466: third_party/cpuinfo/CMakeFiles/cpuinfo.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:55473: third_party/cpuinfo/CMakeFiles/cpuinfo.dir/rule] Error 2
make: *** [Makefile:19806: cpuinfo] Error 2

third_party/cpuinfo/src/cpuinfo/internal-api.h: 51

CPUINFO_PRIVATE void cpuinfo_x86_linux_init(void);

CPUINFO_PRIVATE will make cpuinfo_x86_linux_init symbol to be hidden, so we can not use it in the shared library?

[wdobbe]

Update: disregard comment below, was caused because CMAKE_SYSTEM_PROCESSOR was set to 'arm' in the cmake toolchain file and not recognised by the cpuinfo library. After changing it to 'armv7a' the error reported below went away.

Same issue for ARMv7, even when cpuinfo is built as static library:

/home/wdobbe/.conan2/p/arm_cee6be74543d66/p/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin/../lib/gcc/arm-none-linux-gnueabihf/10.3.1/../../../../arm-none-linux-gnueabihf/bin/ld: /home/wdobbe/.conan2/p/b/cpuin6c568d4251dba/p/lib/libcpuinfo.a(init.c.o): in function `cpuinfo_initialize':
init.c:(.text+0x18): undefined reference to `cpuinfo_arm_linux_init'
/home/wdobbe/.conan2/p/arm_cee6be74543d66/p/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin/../lib/gcc/arm-none-linux-gnueabihf/10.3.1/../../../../arm-none-linux-gnueabihf/bin/ld: flownodegui: hidden symbol `cpuinfo_arm_linux_init' isn't defined
/home/wdobbe/.conan2/p/arm_cee6be74543d66/p/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin/../lib/gcc/arm-none-linux-gnueabihf/10.3.1/../../../../arm-none-linux-gnueabihf/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
gmake[2]: *** [target_display/touch/CMakeFiles/flownodegui.dir/build.make:386: target_display/touch/flownodegui] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:598: target_display/touch/CMakeFiles/flownodegui.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2