pgAdmin III commit: Update the autotools build system to build only the

Update the autotools build system to build only the default system
architecture on Mac (by default). Add flags to allow architectures to
be explicitly selected:

--with-arch-i386
--with-arch-ppc
--with-arch-x86_64
--with-arch-ppc64

This should allow the build system to work with wxWidgets 2.9 on Mac
(which doesn't include the arch flags in wx-config --libs output), and
will allow builds with dependency tracking and ccache to work by default.
architectures to be

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=3d8b5195aa5ac756b13794aa7b45e3f592c2cf17

Modified Files
--------------
acinclude.m4    |  152 +++++++++++++++++++++----------------------------------
configure.ac.in |    6 ++-
2 files changed, 62 insertions(+), 96 deletions(-)