+dnl On ELF systems, linking a program against a string table in shared
+dnl library is very expensive and actually makes things much worse than
+dnl just duplicating the needed strings in the program.
+dnl
+dnl It may help a little bit when static linking or on other shared
+dnl library implementations, which could maybe be auto-detected with
+dnl a configure test, but the penalty for setting these anyway is
+dnl very small (couple hundred bytes of rodata).
+m4_foreach_w([lib], [Xt Xm],
+[AC_DEFINE(m4_toupper(m4_defn([lib]))[STRINGDEFINES], [1],
+[Define to 1 to avoid using the string tables from lib]m4_defn([lib])[.
+On some platforms, or when statically linking lib]m4_defn([lib])[,
+leaving this undefined may reduce the executable size somewhat.])])
+