how to build a program with external sources ?

[glafage]

Hi,

I'm starting to use automake/autoconf at work,
converting a project that is beginning to be
too large for Makefiles.

I've read the book "Gnu Autoconf automake and
libtool"
written by Gary V. Vaughan, Ben Elliston, Tom Tromey 
and Ian Lance Taylor,

and I the following problem:
in a directory containing the source foo.c I
have to build the program foo that also have to be
built
with a source comming from a directory external to
the
current directory.
How can I write it in the Makefile.am ??

Thanks,
Guillaume.
a program

 
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