autoconf computed include file name

Question

Would anybody know if there's any way of computing the name of an included file in autoconf ?

I have a project capable of building one of several variants currently based on an identity defined in configure.ac - my aim is to be able to identify the variant from the CLI when autoconf/configure is run and include an m4 file if/as appropriate. AFAICT, only string literals are allowed as the filename in either the include or sinclude macro calls ... and it's now starting to drive me to distraction =:-O

Any help most gratefully received

DP

Answer 1

The identity is setup at configure runtime, not when configure is created. Any m4 level (e.g. m4sugar) manipulation of configure will happen before then, so this doesn't look possible.