user/digikam: (ppc) FTBFS: undefined reference to `__atomic_fetch_add_8'
Found on ppc:
,,,
[ 58%] Built target core_dimg_obj
[ 58%] Building CXX object core/app/CMakeFiles/digikamcore.dir/digikamcore_autogen/mocs_compilation.cpp.o
[ 58%] Building CXX object core/app/CMakeFiles/digikamcore.dir/utils/digikam_debug.cpp.o
[ 58%] Building CXX object core/app/CMakeFiles/digikamcore.dir/utils/digikam_version.cpp.o
[ 58%] Linking CXX shared library libdigikamcore.so
/usr/lib/gcc/powerpc-foxkit-linux-musl/8.5.0/../../../../powerpc-foxkit-linux-musl/bin/ld: ../libs/dngwriter/CMakeFiles/core_libdng_obj.dir/extra/dng_sdk/dng_hue_sat_map.cpp.o: in function `std::__atomic_base<unsigned long long>::operator++()':
/usr/include/c++/8.5.0/bits/atomic_base.h:296: undefined reference to `__atomic_fetch_add_8'
collect2: error: ld returned 1 exit status
make[2]: *** [core/app/CMakeFiles/digikamcore.dir/build.make:1860: core/app/libdigikamcore.so.7.6.0] Error 1
make[1]: *** [CMakeFiles/Makefile2:10914: core/app/CMakeFiles/digikamcore.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
>>> ERROR: digikam: build failed