# HG changeset patch
# User Rik <rik@octave.org>
# Date 1344627571 25200
# Node ID e412d18d4fa5575faf2f3e1d902ab747deb119d1
# Parent  f4684192158ec391b9bc9994e813bbebf7a2882d
configure.ac: Allow caching of EXCEPTION_IN_MATH test.

* configure.ac: Allow caching of EXCEPTION_IN_MATH test.

diff -r f4684192158e -r e412d18d4fa5 configure.ac
--- a/configure.ac	Fri Aug 10 12:19:59 2012 -0700
+++ b/configure.ac	Fri Aug 10 12:39:31 2012 -0700
@@ -2003,15 +2003,24 @@
 
 AC_FUNC_CLOSEDIR_VOID
 
-## Return type of matherr() 
-AC_MSG_CHECKING([for struct exception in math.h])
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],
-  [[struct exception *x; x->type; x->name;]])],
-  [AC_MSG_RESULT(yes)
-   AC_DEFINE(EXCEPTION_IN_MATH, 1,
-     [Define to 1 if your math.h declares struct exception for matherr().])],
-  [AC_MSG_RESULT(no)])
-
+## Check return type of matherr() 
+AC_CACHE_CHECK([for struct exception in math.h],
+  [octave_cv_func_matherr_type],
+  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+      #include <math.h>
+      ]], [[
+      struct exception *x;
+      x->type;
+      x->name;
+      ]])],
+    octave_cv_func_matherr_type=yes,
+    octave_cv_func_matherr_type=no)
+  ])
+if test $octave_cv_func_matherr_type = "yes"; then
+  AC_DEFINE(EXCEPTION_IN_MATH, 1,
+    [Define to 1 if math.h declares struct exception for matherr().])
+fi
+ 
 ## Signal stuff.
 
 AC_CHECK_DECLS([sys_siglist], [], [],