Define HUGE_VAL in <math.h> conditionally. That's what gcc's fixincludes

hack math_huge_val_ifndef does, anyway. We do it ourselves and remove
the therefore superfluous gcc math.h header.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24412 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/scripts/build_cross_tools

@@ -121,6 +121,11 @@ make install-gcc-cross || {
 	exit 1
 }
 
+# Remove the math.h gcc header. It has been generated by fixincludes
+# (unconditional hack: math_huge_val_ifndef) from ours and it is semantically
+# equivalent.
+rm $installDir/lib/gcc-lib/i586-pc-beos/$haikuRequiredLegacyGCCVersion/include/math.h
+
 
 # cleanup
 

headers/posix/math.h

@@ -26,7 +26,9 @@
 /* platform independent IEEE floating point special values */
 #define	__HUGE_VAL_v	0x7ff0000000000000LL
 #define __huge_val_t	union { unsigned char __c[8]; long long __ll; double __d; }
-#define HUGE_VAL		(((__huge_val_t) { __ll: __HUGE_VAL_v }).__d)
+#ifndef HUGE_VAL
+#	define HUGE_VAL		(((__huge_val_t) { __ll: __HUGE_VAL_v }).__d)
+#endif
 
 #define __HUGE_VALF_v	0x7f800000L
 #define __huge_valf_t	union { unsigned char __c[4]; long __l; float __f; }