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Added a workaround for MinGW-32 so that fenv.h actually gets included.

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This commit is contained in:
Andrey Semashev
2014-06-13 00:29:39 +04:00
parent 1318e4a728
commit 509c2421e3
1 changed files with 28 additions and 0 deletions
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28
include/boost/detail/fenv.hpp
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@ -61,7 +61,35 @@
using ::feholdexcept;
} }
#elif defined(__MINGW32__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408
// MinGW (32-bit) has a bug in mingw32/bits/c++config.h, it does not define _GLIBCXX_HAVE_FENV_H,
// which prevents the C fenv.h header contents to be included in the C++ wrapper header fenv.h. This is at least
// the case with gcc 4.8.1 packages tested so far, up to 4.8.1-4. Note that there is no issue with
// MinGW-w64.
// To work around the bug we avoid including the C++ wrapper header and include the C header directly
// and import all relevant symbols into std:: ourselves.
#include <../include/fenv.h>
namespace std {
using ::fenv_t;
using ::fexcept_t;
using ::fegetexceptflag;
using ::fesetexceptflag;
using ::feclearexcept;
using ::feraiseexcept;
using ::fetestexcept;
using ::fegetround;
using ::fesetround;
using ::fegetenv;
using ::fesetenv;
using ::feupdateenv;
using ::feholdexcept;
}
#else /* if we're not using GNU's C stdlib, fenv.h should work with clang */
#if defined(__SUNPRO_CC) /* lol suncc */
#include <stdio.h>
#endif