[cfe-commits] r134407 - /cfe/trunk/lib/Headers/float.h

[Douglas Gregor]

Author: dgregor
Date: Tue Jul  5 09:17:04 2011
New Revision: 134407

URL: http://llvm.org/viewvc/llvm-project?rev=134407&view=rev
Log:
Teach Clang's <float.h> to also include MinGW's <float.h>, which provides additional system definitions, from Ruben Van Boxem

Modified:
    cfe/trunk/lib/Headers/float.h

Modified: cfe/trunk/lib/Headers/float.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Headers/float.h?rev=134407&r1=134406&r2=134407&view=diff
==============================================================================
--- cfe/trunk/lib/Headers/float.h (original)
+++ cfe/trunk/lib/Headers/float.h Tue Jul  5 09:17:04 2011
@@ -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__