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-rw-r--r--m4/extensions.m47
1 files changed, 6 insertions, 1 deletions
diff --git a/m4/extensions.m4 b/m4/extensions.m4
index 0c16bb832f8..f8543386795 100644
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -1,4 +1,4 @@
-# serial 16 -*- Autoconf -*-
+# serial 17 -*- Autoconf -*-
# Enable extensions on systems that normally disable them.
# Copyright (C) 2003, 2006-2017 Free Software Foundation, Inc.
@@ -68,6 +68,10 @@ dnl configure.ac when using autoheader 2.62.
#ifndef _GNU_SOURCE
# undef _GNU_SOURCE
#endif
+/* Enable NetBSD extensions on NetBSD. */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
/* Enable OpenBSD extensions on NetBSD. */
#ifndef _OPENBSD_SOURCE
# undef _OPENBSD_SOURCE
@@ -132,6 +136,7 @@ dnl configure.ac when using autoheader 2.62.
AC_DEFINE([_ALL_SOURCE])
AC_DEFINE([_DARWIN_C_SOURCE])
AC_DEFINE([_GNU_SOURCE])
+ AC_DEFINE([_NETBSD_SOURCE])
AC_DEFINE([_OPENBSD_SOURCE])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
AC_DEFINE([__STDC_WANT_IEC_60559_ATTRIBS_EXT__])