Emulate AC_USE_SYSTEM_EXTENSIONS and _GNU_SOURCE for mingw-w64

diff --git a/configure.ac b/configure.ac
index b847f5736f2e8365d954133214cd1c7b56aece18..677cc678518139bbae461de618151b861015df3e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -231,6 +231,14 @@ case "${host_os}" in
     AC_DEFINE([_WIN32_IE], 0x0600, [Define to '0x0600' for IE 6.0 (and shell) APIs.])
     AC_DEFINE([_UNICODE], [1], [Define to 1 for Unicode (Wide Chars) APIs.])
     AC_DEFINE([UNICODE], [1], [Define to 1 for Unicode (Wide Chars) APIs.])
+    AC_DEFINE([_ISOC99_SOURCE], [1], [Extensions to ISO C89 from ISO C99.])
+    AC_DEFINE([_ISOC11_SOURCE], [1], [Extensions to ISO C99 from ISO C11.])
+    AC_DEFINE([_POSIX_SOURCE], [1], [IEEE Std 1003.1.])
+    AC_DEFINE([_POSIX_C_SOURCE], [200809L], [IEEE Std 1003.1.])
+    AC_DEFINE([_XOPEN_SOURCE], [700], [POSIX and XPG 7th edition])
+    AC_DEFINE([_XOPEN_SOURCE_EXTENDED], [1], [XPG things and X/Open Unix extensions.])
+    AC_DEFINE([_BSD_SOURCE], [1], [ISO C, POSIX, and 4.3BSD things.])
+    AC_DEFINE([_SVID_SOURCE], [1], [ISO C, POSIX, and SVID things.])
 
     case "${host_os}" in
       *mingw32*)