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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/detail/fenv.hpp')
-rw-r--r-- | src/third_party/boost-1.60.0/boost/detail/fenv.hpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/detail/fenv.hpp b/src/third_party/boost-1.60.0/boost/detail/fenv.hpp new file mode 100644 index 00000000000..b268f5c1ccd --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/detail/fenv.hpp @@ -0,0 +1,101 @@ +/*============================================================================= + Copyright (c) 2010 Bryce Lelbach + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +=============================================================================*/ + +#include <boost/config.hpp> + +#if defined(BOOST_NO_FENV_H) + #error This platform does not have a floating point environment +#endif + +#if !defined(BOOST_DETAIL_FENV_HPP) +#define BOOST_DETAIL_FENV_HPP + +/* If we're using clang + glibc, we have to get hacky. + * See http://llvm.org/bugs/show_bug.cgi?id=6907 */ +#if defined(__clang__) && (__clang_major__ < 3) && \ + defined(__GNU_LIBRARY__) && /* up to version 5 */ \ + defined(__GLIBC__) && /* version 6 + */ \ + !defined(_FENV_H) + #define _FENV_H + + #include <features.h> + #include <bits/fenv.h> + + extern "C" { + extern int fegetexceptflag (fexcept_t*, int) __THROW; + extern int fesetexceptflag (__const fexcept_t*, int) __THROW; + extern int feclearexcept (int) __THROW; + extern int feraiseexcept (int) __THROW; + extern int fetestexcept (int) __THROW; + extern int fegetround (void) __THROW; + extern int fesetround (int) __THROW; + extern int fegetenv (fenv_t*) __THROW; + extern int fesetenv (__const fenv_t*) __THROW; + extern int feupdateenv (__const fenv_t*) __THROW; + extern int feholdexcept (fenv_t*) __THROW; + + #ifdef __USE_GNU + extern int feenableexcept (int) __THROW; + extern int fedisableexcept (int) __THROW; + extern int fegetexcept (void) __THROW; + #endif + } + + namespace std { namespace tr1 { + 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; + } } + +#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 + + #include <fenv.h> + +#endif + +#endif /* BOOST_DETAIL_FENV_HPP */ |