Bug 670499-configure.ac: Check for nearbyint(), isinf() and isnan()

nearbyint(), isinf() and isnan() are C99 functions, so check for them.

Also clean up configure.ac a little bit as the checks for rint() and
round() can be a bit simpler, according to Matthias' suggestions.

diff --git a/configure.ac b/configure.ac
index a87fb3f2b59765cac37acf763cbe9ac6797bfec6..1ac1b23eff0111488b27b753944caadb06c8ec50 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -749,17 +749,9 @@ AC_CHECK_FUNCS(mallinfo)
 AC_CHECK_FUNCS(getresuid)
 AC_TYPE_UID_T
 
-# Check for round()
-AC_CHECK_LIB(m,round,have_round=yes,have_round=no)
-if test $have_round = yes; then
-    AC_DEFINE(HAVE_ROUND, 1, [Define to 1 if round() is available])
-fi
-
-# Check for rint()
-AC_CHECK_LIB(m,rint,have_rint=yes,have_rint=no)
-if test $have_rint = yes; then
-    AC_DEFINE(HAVE_RINT, 1, [Define to 1 if rint() is available])
-fi
+# Check for round(), rint(), isnan(), isinf() and nearbyint()
+AC_CHECK_LIB(m,round,,)
+AC_CHECK_FUNCS(round rint isnan isinf nearbyint)
 
 # Checks for gdkspawn
 AC_CHECK_HEADERS(crt_externs.h)