29 #ifndef _GLIBCXX_TR1_CFENV
30 #define _GLIBCXX_TR1_CFENV 1
32 #pragma GCC system_header
36 #if _GLIBCXX_HAVE_FENV_H
40 #ifdef _GLIBCXX_USE_C99_FENV_TR1
43 #undef fegetexceptflag
45 #undef fesetexceptflag
54 namespace std _GLIBCXX_VISIBILITY(default)
63 using ::feclearexcept;
64 using ::fegetexceptflag;
65 using ::feraiseexcept;
66 using ::fesetexceptflag;
79 #endif // _GLIBCXX_USE_C99_FENV_TR1
81 #endif // _GLIBCXX_TR1_CFENV
ISO C++ entities toplevel namespace is std.