[Bug fortran/69043] Trying to include a directory causes an infinite loop

[andris.pavenis at iki dot fi]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69043

Andris Pavenis <andris.pavenis at iki dot fi> changed:

           What    |Removed                     |Added
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                 CC|                            |andris.pavenis at iki dot fi

--- Comment #6 from Andris Pavenis <andris.pavenis at iki dot fi> ---
Breaks include support for DJGPP native compiler as S_ISREG is 0 for it. One
should use S_ISREG(st.st_mode) instead. gcc/system.h ensures that S_ISREG is
defined, so there should be no problems with it.

Verified that replacing '(st.st_mode & S_IFREG)' with S_ISREG(st.st_mode) fixes
libgfortran native build for DJGPP.