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29 #ifndef _GLIBCXX_TR1_CFENV
30 #define _GLIBCXX_TR1_CFENV 1
32 #pragma GCC system_header
35 #if _GLIBCXX_HAVE_FENV_H
39 #if defined(_GLIBCXX_INCLUDE_AS_TR1)
42 # define _GLIBCXX_INCLUDE_AS_TR1
43 # define _GLIBCXX_BEGIN_NAMESPACE_TR1 namespace tr1 {
44 # define _GLIBCXX_END_NAMESPACE_TR1 }
45 # define _GLIBCXX_TR1 tr1::
48 # undef _GLIBCXX_END_NAMESPACE_TR1
49 # undef _GLIBCXX_BEGIN_NAMESPACE_TR1
50 # undef _GLIBCXX_INCLUDE_AS_TR1
53 #endif // _GLIBCXX_TR1_CFENV