annotate src/libsndfile-1.0.27/M4/really_gcc.m4 @ 75:8f7fd4420df7
Add some cross-platform Boost headers
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Chris Cannam |
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Sat, 16 Feb 2019 16:31:25 +0000 |
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1df64224f5ac |
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1 dnl @synopsis MN_GCC_REALLY_IS_GCC
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2 dnl
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3 dnl Find out if a compiler claiming to be gcc really is gcc (fuck you clang).
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4 dnl @version 1.0 Oct 31 2013
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5 dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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6 dnl
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7 dnl Permission to use, copy, modify, distribute, and sell this file for any
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8 dnl purpose is hereby granted without fee, provided that the above copyright
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9 dnl and this permission notice appear in all copies. No representations are
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10 dnl made about the suitability of this software for any purpose. It is
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11 dnl provided "as is" without express or implied warranty.
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12 dnl
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13
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14 # If the configure script has already detected GNU GCC, then make sure it
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15 # isn't CLANG masquerading as GCC.
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16
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17 AC_DEFUN([MN_GCC_REALLY_IS_GCC],
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18 [ AC_LANG_ASSERT(C)
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19 if test "x$ac_cv_c_compiler_gnu" = "xyes" ; then
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20 AC_TRY_LINK([
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21 #include <stdio.h>
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22 ],
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23 [
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24 #ifdef __clang__
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25 This is clang!
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26 #endif
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27 ],
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28 ac_cv_c_compiler_gnu=yes,
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29 ac_cv_c_compiler_gnu=no
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30 )
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31 fi
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32
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33 ])
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