1 /*============================================================================= 2 Copyright (c) 2010 Bryce Lelbach 3 4 Distributed under the Boost Software License, Version 1.0. (See accompanying 5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 =============================================================================*/ 7 8 #include <boost/config.hpp> 9 10 #if defined(BOOST_NO_FENV_H) 11 #error This platform does not have a floating point environment 12 #endif 13 14 #if !defined(BOOST_DETAIL_FENV_HPP) 15 #define BOOST_DETAIL_FENV_HPP 16 17 /* If we're using clang + glibc, we have to get hacky. 18 * See http://llvm.org/bugs/show_bug.cgi?id=6907 */ 19 #if defined(__clang__) && (__clang_major__ < 3) && \ 20 defined(__GNU_LIBRARY__) && /* up to version 5 */ \ 21 defined(__GLIBC__) && /* version 6 + */ \ 22 !defined(_FENV_H) 23 #define _FENV_H 24 25 #include <features.h> 26 #include <bits/fenv.h> 27 28 extern "C" { 29 extern int fegetexceptflag (fexcept_t*, int) __THROW; 30 extern int fesetexceptflag (__const fexcept_t*, int) __THROW; 31 extern int feclearexcept (int) __THROW; 32 extern int feraiseexcept (int) __THROW; 33 extern int fetestexcept (int) __THROW; 34 extern int fegetround (void) __THROW; 35 extern int fesetround (int) __THROW; 36 extern int fegetenv (fenv_t*) __THROW; 37 extern int fesetenv (__const fenv_t*) __THROW; 38 extern int feupdateenv (__const fenv_t*) __THROW; 39 extern int feholdexcept (fenv_t*) __THROW; 40 41 #ifdef __USE_GNU 42 extern int feenableexcept (int) __THROW; 43 extern int fedisableexcept (int) __THROW; 44 extern int fegetexcept (void) __THROW; 45 #endif 46 } 47 48 namespace std { namespace tr1 { 49 using ::fenv_t; 50 using ::fexcept_t; 51 using ::fegetexceptflag; 52 using ::fesetexceptflag; 53 using ::feclearexcept; 54 using ::feraiseexcept; 55 using ::fetestexcept; 56 using ::fegetround; 57 using ::fesetround; 58 using ::fegetenv; 59 using ::fesetenv; 60 using ::feupdateenv; 61 using ::feholdexcept; 62 } } 63 64 #elif defined(__MINGW32__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 65 66 // MinGW (32-bit) has a bug in mingw32/bits/c++config.h, it does not define _GLIBCXX_HAVE_FENV_H, 67 // which prevents the C fenv.h header contents to be included in the C++ wrapper header fenv.h. This is at least 68 // the case with gcc 4.8.1 packages tested so far, up to 4.8.1-4. Note that there is no issue with 69 // MinGW-w64. 70 // To work around the bug we avoid including the C++ wrapper header and include the C header directly 71 // and import all relevant symbols into std:: ourselves. 72 73 #include <../include/fenv.h> 74 75 namespace std { 76 using ::fenv_t; 77 using ::fexcept_t; 78 using ::fegetexceptflag; 79 using ::fesetexceptflag; 80 using ::feclearexcept; 81 using ::feraiseexcept; 82 using ::fetestexcept; 83 using ::fegetround; 84 using ::fesetround; 85 using ::fegetenv; 86 using ::fesetenv; 87 using ::feupdateenv; 88 using ::feholdexcept; 89 } 90 91 #else /* if we're not using GNU's C stdlib, fenv.h should work with clang */ 92 93 #if defined(__SUNPRO_CC) /* lol suncc */ 94 #include <stdio.h> 95 #endif 96 97 #include <fenv.h> 98 99 #endif 100 101 #endif /* BOOST_DETAIL_FENV_HPP */ 102