Updated boost to v1.55.0

[rsem.git] / boost / detail / fenv.hpp

diff --git a/boost/detail/fenv.hpp b/boost/detail/fenv.hpp
new file mode 100644 (file)
index 0000000..f048706
--- /dev/null
+++ b/boost/detail/fenv.hpp
@@ -0,0 +1,74 @@
+/*=============================================================================
+    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;
+  } }
+
+#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 */
+