_XOPEN_SOURCE     122 git-compat-util.h # define _XOPEN_SOURCE 600
_XOPEN_SOURCE     124 git-compat-util.h # define _XOPEN_SOURCE 500
_XOPEN_SOURCE     130 git-compat-util.h #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */