make sure all elements required in the definition of isinf are defined in their turn

[rrdtool.git] / m4 / acinclude.m4

diff --git a/m4/acinclude.m4 b/m4/acinclude.m4
index c1e5c4b..01eb4a4 100644 (file)
--- a/m4/acinclude.m4
+++ b/m4/acinclude.m4
@@ -363,13 +363,13 @@ AC_CACHE_VAL([rd_cv_ieee_$2],
 #endif
 
 /* solaris 10 it defines isnan such that only forte can compile it ... bad bad  */
-#if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS))
+#if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS) && defined(FP_SNAN) && defined(FP_QNAN))
 #  undef isnan
 #  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
 #endif
 
 /* Digital UNIX */
-#if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H))
+#if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H) && defined(FP_NEG_INF) && defined( FP_POS_INF) )
 #  define HAVE_ISINF 1
 #  define isinf(a) (fp_class(a) == FP_NEG_INF || fp_class(a) == FP_POS_INF)
 #endif