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