29 #ifndef _GLIBCXX_FENV_H
30 #define _GLIBCXX_FENV_H 1
32 #pragma GCC system_header
35 #if _GLIBCXX_HAVE_FENV_H
36 # include_next <fenv.h>
39 #ifdef __GXX_EXPERIMENTAL_CXX0X__
40 # if defined(_GLIBCXX_INCLUDE_AS_TR1)
41 # error C++0x header cannot be included from TR1 header
43 # if defined(_GLIBCXX_INCLUDE_AS_CXX0X)
46 # define _GLIBCXX_INCLUDE_AS_CXX0X
47 # define _GLIBCXX_BEGIN_NAMESPACE_TR1
48 # define _GLIBCXX_END_NAMESPACE_TR1
52 # undef _GLIBCXX_END_NAMESPACE_TR1
53 # undef _GLIBCXX_BEGIN_NAMESPACE_TR1
54 # undef _GLIBCXX_INCLUDE_AS_CXX0X
58 #endif // _GLIBCXX_FENV_H