1# Enable extensions on systems that normally disable them. 2 3dnl Copyright (C) 2003, 2006 Free Software Foundation, Inc. 4dnl This file is free software; the Free Software Foundation 5dnl gives unlimited permission to copy and/or distribute it, 6dnl with or without modifications, as long as this notice is preserved. 7 8dnl This file is only needed in autoconf <= 2.59. Newer versions of autoconf 9dnl have a macro AC_USE_SYSTEM_EXTENSIONS with identical semantics. 10 11# gl_USE_SYSTEM_EXTENSIONS 12# ------------------------ 13# Enable extensions on systems that normally disable them, 14# typically due to standards-conformance issues. 15AC_DEFUN([gl_USE_SYSTEM_EXTENSIONS], [ 16 AC_BEFORE([$0], [AC_COMPILE_IFELSE]) 17 AC_BEFORE([$0], [AC_RUN_IFELSE]) 18 19 AC_REQUIRE([AC_GNU_SOURCE]) 20 AC_REQUIRE([AC_AIX]) 21 AC_REQUIRE([AC_MINIX]) 22 23 AH_VERBATIM([__EXTENSIONS__], 24[/* Enable extensions on Solaris. */ 25#ifndef __EXTENSIONS__ 26# undef __EXTENSIONS__ 27#endif]) 28 AC_DEFINE([__EXTENSIONS__]) 29]) 30