Processing intermediate source files

[jarek]

Hello!

        I have a c/c++ project with some number of intermediate files generated
from ASN.1 sources.
        At the moment I'm building intermediate .cpp/.h sources like this:

regen: regenerate-from-asn1-source

regenerate-from-asn1-source:
        esnacc -C file1.asn file2.asn file3.asn

What should I write in Makefile.am so the regeneration will be performed
automatically, when any of ASN.1 files will be changed ?

I've tried with SUFFIXES but, there is no simple relation between one
ASN.1 and one .cpp file. ASN.1 files have dependecies, and they should
be compiled together.

best regards
Jarek