# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
-#serial 3
+#serial 4
AC_DEFUN([AX_CHECK_LIBRARY], [
AC_ARG_VAR($1[_CPPFLAGS], [C preprocessor flags for ]$1[ headers])
AS_IF([test "$]AS_TR_SH([ax_cv_have_]$1)[" = "yes"],
AC_DEFINE([HAVE_]$1, [1], [Define to 1 if ]$1[ is found])
- m4_ifnblank([$4], [$4]),
- m4_ifnblank([$5], [$5]))
+ m4_ifval( m4_normalize([$4]), [$4]),
+ m4_ifval( m4_normalize([$5]), [$5]))
])