dnl check for the obstack header file
-AC_FUNC_OBSTACK
+dnl does not work with:
+dnl - cygwin
+dnl - MacOSX
+#AC_FUNC_OBSTACK
-#AC_CHECK_HEADERS(obstack.h, ac_obstack_headers="yes", ac_obstack_headers="no")
-#if test "$ac_obstack_headers" != yes; then
-if test "$ac_cv_func_obstack" != "yes"; then
+AC_CHECK_HEADERS(obstack.h, ac_obstack_headers="yes", ac_obstack_headers="no")
+if test "$ac_obstack_headers" != yes; then
dnl obstack header not found.
- AC_MSG_ERROR("no obstack support")
+ AC_MSG_ERROR("obstack.h not found")
fi