Changing prefix for recursive autoconf subprojects

[Michael Johnson]

Hello autoconf gurus,

I am wondering if there is a way to modify the prefix passed down in a  
recursive autoconf which uses the AC_CONFIG_SUBDIRS to recurse into  
subprojects.

Situation:  I have project A which has two subprojects B and C (which  
also contain others subprojects, and A may or may not be itself a  
subproject of Z, but I don't think this is relevant).

Problem: I need the recursive 'make install' on project B to install  
into the prefix dir passed down by A, but I need the recursive 'make  
install' on C to install into a subdirectory of A's prefix.  To be  
concrete, if $prefix is "/usr/local" I want B to install into "/usr/ 
local" but I need subproject C to install into "/usr/local/foo".  The  
reason is to avoid overwriting a potential existing installation of  
the subproject C that may have been installed previously since we  
modified the source.  Unfortunately, we cannot make C a separate  
project for dependency reasons.

Is there a way to append a subdirectory to the prefix passed down to  
one subproject but not the other with autoconf?  Or is there perhaps  
another way to do this that does not use autoconf?

Thank you for your time and any help on this problem!

Regards,
Michael

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Michael Johnson <address@hidden>
OPeNDAP, Inc.