[Swig-user] How to compile a Universal Binary for swig 2.0+ on Mac OSX?

[Kathryn R. <kr...@cs...>]

Hi all,

I'm running Mac OSX 10.5.8.  It seems to have come with a copy of swig
1.3.31 as a Universal Binary:
$ file /usr/bin/swig-1.3.31
/usr/bin/swig-1.3.31: Mach-O universal binary with 2 architectures
/usr/bin/swig-1.3.31 (for architecture i386):   Mach-O executable i386
/usr/bin/swig-1.3.31 (for architecture ppc7400):        Mach-O executable ppc

I'd like to upgrade to swig 2.0+, but have been unable to figure out
how to get ./configure to create a similarly dual-architecture
executable.  I would like to end up with a Universal Binary for i386
and x86_64, specifically so I can build a swig-dependent project
(Lemur) to work with both Java 5 (i386) and Java 6 (only available as
x86_64, unfortunately, and our Java version-of-choice due to other
library dependencies).

 In the past I've modified simple projects to build universal binaries
by adding an -arch argument for each architecture I want to include,
but I haven't done it for an automake project before and I find it's a
little hairier to locate the right flag definition. :)

Google doesn't seem to know anything about swig and universal
binaries, and I came up empty on the list archives.

Does swig ./configure support a dual-architecture build in a
straightforward way?
If not, is there any guidance someone might give me as to how to
modify the configuration files before building swig?
Or, is this a lost cause, and I should either (a) pick an
architecture, and woe betide if I need swig for a Java 5 project, or
(b) do both, separately, and figure out how to tell dependent projects
which to use later.

Best,
Katie