use mainly while making the post modules. This avoids the catch-22 situation
when building statically and the linking fails after post modules, in which
case you wouldn't get past the pre-post-module link step to allow you to
have another go at generating the post modules.

Rev: src/Makefile.in:1.415
Rev: src/make_variables.in:1.17
Rev: src/module.c:1.39
Rev: src/precompile.sh.in:1.38
Rev: src/tmodule.c:1.1