Mac_utils build fails
Since the https://github.com/ufz/ogs/pull/1238 PR mac-utils build on jenkins is broken (see Jenkins/OGS-6/Mac_Utils there it is red since build number 535, which is the named PR merge). Namely since b7d9fb, where metis cmake is included.
The error is
ThirdParty/tetgen/predicates.cxx:123:10: fatal error: 'fpu_control.h' file not found
#include <fpu_control.h>
It seems to me that the metis' cmake defines LINUX, wihch is protecting the fpu_control.h include.