https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100662
--- Comment #7 from Yuri <yuri at tsoft dot com> --- fpu-387.h is in the gcc10 source tree: > $ find . -name "fpu-*" > ./work/gcc-10.3.0/libgfortran/config/fpu-generic.h > ./work/gcc-10.3.0/libgfortran/config/fpu-sysv.h > ./work/gcc-10.3.0/libgfortran/config/fpu-glibc.h > ./work/gcc-10.3.0/libgfortran/config/fpu-aix.h > ./work/gcc-10.3.0/libgfortran/config/fpu-387.h fpu-aarch64.h isn't in the gcc10 tree, and not among FreeBSD-installed headers. It seems that it is missing in gcc?