comparison src/libsndfile-1.0.27/M4/really_gcc.m4 @ 125:cd6cdf86811e

Current libsndfile source

+dnl @synopsis MN_GCC_REALLY_IS_GCC
+dnl
+dnl Find out if a compiler claiming to be gcc really is gcc (fuck you clang).
+dnl @version 1.0	Oct 31 2013
+dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
+dnl
+dnl Permission to use, copy, modify, distribute, and sell this file for any
+dnl purpose is hereby granted without fee, provided that the above copyright
+dnl and this permission notice appear in all copies.  No representations are
+dnl made about the suitability of this software for any purpose.  It is
+dnl provided "as is" without express or implied warranty.
+dnl
+
+# If the configure script has already detected GNU GCC, then make sure it
+# isn't CLANG masquerading as GCC.
+
+AC_DEFUN([MN_GCC_REALLY_IS_GCC],
+[	AC_LANG_ASSERT(C)
+	if test "x$ac_cv_c_compiler_gnu" = "xyes" ; then
+		AC_TRY_LINK([
+			#include <stdio.h>
+			],
+			[
+			#ifdef __clang__
+				This is clang!
+			#endif
+			],
+		ac_cv_c_compiler_gnu=yes,
+		ac_cv_c_compiler_gnu=no
+		)
+		fi
+
+])