Where does AC_CHECK_LIB look?

[Chris Albertson]

Hi,

I thought I'd finally learn to use the GNU "auto tools".  It went 
surprizingly well.  I was able to toss out my hand written make files 
for a ~20K LOC C project after one afternoon.  Now I'm trying to make 
my build system more robust and have a question I can't find answers 
to in the manual and yes, I've even tried reading the source

  1) Where does AC_CHECK_LIB look when it checks for libraries?
  2) How can I get it to look in a few more places?

As an example I have "libfoobar" in /some/wierd/place/lib. and
the folloing _always_ fails_

  AC_CHECK_LIB(foobar TwelveBarBlues)


But the makefile built by automake/autoconf works!  (I don't know
why, maybe because I have /some/wierd/place/bin in $PATH?)  It puts 
the correct -I, -l and -L options in so that libfoobar and foobar.h 
are found.  OK I am happy that I can build by program but the error 
message from AC_CHECK_LIB is frustrating