Hello Heiner. > On 29 Sep 2021, at 08:04, Heiner Veelken via Fortran <fortran@gcc.gnu.org> > wrote:
> This is my first post; kindly inform me, if I did anything wrong :-) > I am using gfortran (M1) from hpc.sourceforge.net > <http://hpc.sourceforge.net/> on my Apple Macbook Pro M1. I just create my > executable via: > > gfortran Pmain.f psub.F -o prog_m1 > > This only works on my machine. On Apple Intel Macbook Pros the response in > the terminal is a.o. "bad cpu type". > Is there a possibility to create something like a "universal binary" in > gfortran, which works as well for M1- and Intel-CPUs? In case of, what would > be the option to call the compiler, how would it look like? Yes it is possible, but I don’t know if any distribution is supplying the relevant compiler for gfortran. Essentially, one needs a [cross]compiler generating Intel (x86_64) code which runs on the M1. then you build your program with the native compiler => m1/my_prog then you build your program with the cross-compiler => intel/my_prog then you make a “FAT” version, thus: lipo m1/my_prog intel/my_prog -create -output fat/my_prog (or however you prefer to layout your work, of course) so you’d need to see if hpc.sourceforge.net is providing a cross compiler targetting intel .. if not, then ask back here and perhaps we can suggest an alternative. Iain. > Remark: Is there a Fortran-guru here living in Aachen, Germany, too?