solaris 10 has isnan defined as a sun forte builtin ... gcc can not deal with this

this will replace isnan with an fpclass expression hopefully working around the problem

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2@865 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/configure.ac b/program/configure.ac
index 56b9532f802ac979f25d84ef3304e913260a47e3..e50796edaa116d13ecec02c53c134ee5bb39e487 100644 (file)
--- a/program/configure.ac
+++ b/program/configure.ac
@@ -103,6 +103,12 @@ char *strchr (), *strrchr ();
 #  define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
 #endif
 
+/* solaris 10 it defines isnan such that only forte can compile it ... bad bad  */
+#if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS))
+#  undef isnan
+#  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
+#endif
+
 /* for OSF1 Digital Unix */
 #if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H))
 #  define HAVE_ISINF 1