-# Check for uxtheme.h (for MS-Windows Engine)
-AC_MSG_CHECKING(for uxtheme.h)
-AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <uxtheme.h>]])],
- [gtk_uxtheme_h=yes], [gtk_uxtheme_h=no])
-if test $gtk_uxtheme_h = yes; then
- AC_DEFINE(HAVE_UXTHEME_H, 1, [Have uxtheme.h include file])
-fi
-AC_MSG_RESULT($gtk_uxtheme_h)
-
-# 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 nearbyint)
+AC_CHECK_DECLS([isnan, isinf], [], [], [[#include <math.h>]])