Fix installation problems for clang users having OpenMP already installed somewhere
If you have a mac and you are using clang and you have OpenMP already installed somewhere (e.g. because you are using ImageMagick), then you may get a linking error when running make install.
You can fix the problem by helping the compiler to find the correct paths by editing openfpm_numerics/src/CMakeLists.txt:
after line 87 add: target_include_directories (numerics PUBLIC /usr/local/include) after line 114 add: target_link_libraries(numerics -L/usr/local/lib -lomp)
(@Pietro: please correct me if this was not formulated well)