autoconf computed include file name

0
votes

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

1
includeautoconfcomputed-values
I think I have a better understanding of what you are trying to do now. So how is this "identity" defined in configure.ac? Is it in the shell scripting layer (e.g. a shell variable, AC_ARG_WITH, AC_ARG_ENABLE, et al.) or the m4sugar layer (e.g. m4_define, m4_include, m4_sinclude et al.)? If it's defined in the shell scripting layer, it's already too late to do anything in m4 -- configure has already been written. - ldav1s
Thanx for that @ldav1s, you have confirmed my newly gained understanding of what's going on under the hood. FWIW, the option is passed in as a configure option which means that I have to come up with an alternative solution to the problem. (I'd love to say that you've answered the question, but as a noob, don't know how to. - David Pointon

1 Answers

0
votes

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.