Since glibc 2.20, the _BSD_SOURCE and _SVID_SOURCE macros are deprecated in favor of the _DEFAULT_SOURCE macro. See https://sourceware.org/glibc/wiki/Release/2.20#Packaging_Changes Change-Id: I18dd6a698f3f5aa51d1e45bf53b031bb061e17e8 Reviewed-on: https://plan9port-review.googlesource.com/1500 Reviewed-by: David du Colombier <0intro@gmail.com>