2
# Make sure _GNU_SOURCE is defined where necessary: as early as possible
3
# for configure-time tests, as well as for every source file that includes
8
AC_DEFUN([AC__GNU_SOURCE],
10
# Make sure that _GNU_SOURCE is defined for all subsequent
11
# configure-time compile tests.
12
# This definition must be emitted (into confdefs.h) before any
13
# test that involves compilation.
14
cat >>confdefs.h <<\EOF
20
# Emit this code into config.h.in.
21
# The ifndef is to avoid redefinition warnings.
22
AH_VERBATIM([_GNU_SOURCE], [#ifndef _GNU_SOURCE