During a cibuildwheel --platform linux build using scikit-build on the quay.io/pypa/manylinux2014_x86_64 image CMake 3.27 cannot find OpenMP:
-- Found OpenMP_C: -fopenmp (found version "4.5")
-- Could NOT find OpenMP_CXX (missing: OpenMP_CXX_FLAGS OpenMP_CXX_LIB_NAMES)
-- Could NOT find OpenMP (missing: OpenMP_CXX_FOUND) (found version "4.5")
I find it a bit of a strange log since it finds OpenMP_C, but not OpenMP .. but does find version "4.5"?
The libgomp package is installed, and the files are picked up by ldconfig:
sh-4.2# ldconfig -p | grep gomp
libgomp.so.1 (libc6,x86-64) => /lib64/libgomp.so.1