33 lines
959 B
Plaintext
33 lines
959 B
Plaintext
dnl @synopsis XIPH_GCC_REALLY_IS_GCC
|
|
dnl
|
|
dnl Find out if a compiler claiming to be gcc really is gcc (clang lies).
|
|
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([XIPH_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
|
|
])
|