| dnl @synopsis XIPH_C_COMPILER_IS_CLANG |
| 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 |
| |
| |
| AC_DEFUN([XIPH_C_COMPILER_IS_CLANG], |
| [AC_CACHE_CHECK(whether we are using the CLANG C compiler, |
| xiph_cv_c_compiler_clang, |
| [ AC_LANG_ASSERT(C) |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([[ |
| #include <stdio.h> |
| ]], [[ |
| #ifndef __clang__ |
| This is not clang! |
| #endif |
| ]])],[xiph_cv_c_compiler_clang=yes],[xiph_cv_c_compiler_clang=no |
| ])] |
| )] |
| ) |
