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Teach Clang's <float.h> to also include MinGW's <float.h>, which provides additional system definitions, from Ruben Van Boxem 

llvm-svn: 134407
This commit is contained in:
Douglas Gregor 2011-07-05 14:17:04 +00:00
parent c750b6c436
commit c9c40ce861
1 changed files with 42 additions and 0 deletions
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42
clang/lib/Headers/float.h
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@ -24,6 +24,48 @@
#ifndef __FLOAT_H
#define __FLOAT_H
/* If we're on MinGW, fall baack to the system's float.h, which might have
* additional definitions provided for Windows.
* For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
*/
#if defined(__MINGW32__) && \
defined(__has_include_next) && __has_include_next(<float.h>)
# include_next <float.h>
/* Undefine anything that we'll be redefining below. */
# undef FLT_EVAL_METHOD
# undef FLT_ROUNDS
# undef FLT_RADIX
# undef FLT_MANT_DIG
# undef DBL_MANT_DIG
# undef LDBL_MANT_DIG
# undef DECIMAL_DIG
# undef FLT_DIG
# undef DBL_DIG
# undef LDBL_DIG
# undef FLT_MIN_EXP
# undef DBL_MIN_EXP
# undef LDBL_MIN_EXP
# undef FLT_MIN_10_EXP
# undef DBL_MIN_10_EXP
# undef LDBL_MIN_10_EXP
# undef FLT_MAX_EXP
# undef DBL_MAX_EXP
# undef LDBL_MAX_EXP
# undef FLT_MAX_10_EXP
# undef DBL_MAX_10_EXP
# undef LDBL_MAX_10_EXP
# undef FLT_MAX
# undef DBL_MAX
# undef LDBL_MAX
# undef FLT_EPSILON
# undef DBL_EPSILON
# undef LDBL_EPSILON
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
#endif
/* Characteristics of floating point types, C99 5.2.4.2.2 */
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__