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Improve code to detect if wchar_t is a native type

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[SVN r21919]
This commit is contained in:
Giovanni Bajo
2004-01-25 16:26:41 +00:00
parent 9b4d488101
commit 38d0bdb068
1 changed files with 9 additions and 3 deletions
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12
include/boost/config/compiler/intel.hpp
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@ -65,9 +65,15 @@
#if BOOST_INTEL_CXX_VERSION < 700
# define BOOST_NO_INTRINSIC_WCHAR_T
#else
// _WCHAR_T_DEFINED is the Win32 spelling
// _WCHAR_T is the Linux spelling
# if !defined(_WCHAR_T_DEFINED) && !defined(_WCHAR_T)
// We should test the macro _WCHAR_T_DEFINED to check if the compiler
// supports wchar_t natively. *BUT* there is a problem here: the standard
// headers define this macro if they typedef wchar_t. Anyway, we're lucky
// because they define it without a value, while Intel C++ defines it
// to 1. So we can check its value to see if the macro was defined natively
// or not.
// Under UNIX, the situation is exactly the same, but the macro _WCHAR_T
// is used instead.
# if ((_WCHAR_T_DEFINED + 0) == 0)) && ((_WCHAR_T + 0) == 0)
# define BOOST_NO_INTRINSIC_WCHAR_T
# endif
#endif