http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52556
--- Comment #5 from Benda Xu <heroxbd at sohu dot com> --- Dear Jakub, I find your comment misleading for the --with-specs option. It sets CONFIGURE_SPECS macro, which is used in gcc.c as static const char *const driver_self_specs[] = { "%{fdump-final-insns:-fdump-final-insns=.} %<fdump-final-insns", DRIVER_SELF_SPECS, CONFIGURE_SPECS, GOMP_SELF_SPECS, GTM_SELF_SPECS }; so it is a list of specs for the driver *itself*, should not be used to specify link spec. If you mean passing --with-specs="-Wl,-dynamic-linker=/whatever/ld.so" to configure, it is broken in multilib cases. Therefore we lack of a convenient way to specify a default alternative location of the dynamic linker. Benda