Hm - I don't find quadmath.h on M1 compute-macos-240-02:petsc svcpetsc$ which gcc-11 /opt/homebrew/bin/gcc-11 compute-macos-240-02:petsc svcpetsc$ find /opt/homebrew -name quadmath.h -print compute-macos-240-02:petsc svcpetsc$
But I see it on intel box compute-macos-240-01:~ balay$ which gcc-11 /usr/local/bin/gcc-11 compute-macos-240-01:~ balay$ find /usr/local -name quadmath.h /usr/local/Cellar/gcc/11.3.0/lib/gcc/11/gcc/x86_64-apple-darwin21/11/include/quadmath.h compute-macos-240-01:~ balay$ So perhaps this feature is missing with gcc on M1? Satish On Thu, 28 Apr 2022, Sanjay Govindjee wrote: > I'm trying to set up some computations in quad precision on a > new Mac (OS 12.3.1, M1 2020) and my homebrew gfortran (11.3.0) is complaining > about real (kind=16). In fact selected_real_kind(30,300) returns -1. > > Has anyone else encountered this issue? and have a work around? > >
