_BSD_SOURCE       318 extra_lib/include/png/pngconf.h #    ifdef _BSD_SOURCE
_BSD_SOURCE       336 extra_lib/include/png/pngconf.h #      ifndef _BSD_SOURCE
_BSD_SOURCE        40 src/utils/cache.c #if defined(_BSD_SOURCE) || _XOPEN_SOURCE >= 500
_BSD_SOURCE       607 src/utils/cache.c #if defined(_BSD_SOURCE) || _XOPEN_SOURCE >= 500