AC_SUBST([GLSRC], [lib])
AC_CONFIG_LIBOBJ_DIR([lib])
-AC_DEFUN_ONCE([DX_GLSYM_PREFIX], [dnl
-AC_REQUIRE([DX_EXPORTED_SH])
+AC_DEFUN_ONCE([DX_GLSYM_PREFIX],
+[AC_REQUIRE([DX_AUTOMAKE_COMPAT])AC_REQUIRE([DX_EXPORTED_SH])
AC_SUBST([GLSYM_PREFIX], [$1])
])
EOF