fixing the solaris build

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@1254 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/configure.ac b/configure.ac
index e3d16d75b26f161e3a6e55c8c996d18ad6586ce3..aa8c5203ead755d7894c2c9dc1520e79e4675d82 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -194,12 +194,15 @@ char *strchr (), *strrchr ();
 /* for Solaris */
 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
 #  define HAVE_ISINF 1
+#  ifdef isinf
+#  undef isinf /* confuse autoconf */
+#  endif
 #  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))
-#  undefine isnan
+#  undef isnan  /* confuse autoconf to NOT remove this */
 #  define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
 #endif