Index: b/usr/src/lib/libc/port/fp/fp_data.c
===================================================================
--- a/usr/src/lib/libc/port/fp/fp_data.c
+++ b/usr/src/lib/libc/port/fp/fp_data.c
@@ -45,10 +45,10 @@
 
 #include <sys/feature_tests.h>
 
-#undef _STDC_C99	/* to force the definition of '_h_val' */
-#undef __C99FEATURES__	/* to force the definition of '_h_val' */
-
-#include <math.h>		/* for '_h_val' */
+typedef union _h_val {
+	unsigned long _i[sizeof (double) / sizeof (unsigned long)];
+	double _d;
+} _h_val;
 
 /* IEEE infinity */
 const _h_val __huge_val =