>>>>> "TR" == Tim Rice <tim@multitalents.net> writes:
TR> It gets tricky trying to automagicly use the -R flag. As an
TR> example, the default install dir for OpenSSL is
TR> /usr/local/ssl. So on platforms that support -R you would
TR> think you could use -L/usr/local/ssl/lib -R/usr/local/ssl/lib
TR> -lssl -lcrypto OpenUNIX supports -R but if you did not build
TR> shared libraries for OpenSSL, the -R/usr/local/ssl/lib will
TR> break the build.
Since there seems to be so little agreement among *nixes about how to
do this, it seems like the only/best place to codify all this
knowledge is in distutils. I still think specifying
runtime_library_dirs to the Extension constructor is the right thing
to do. But maybe on some systems distutils ought to ignore it, or at
least check to make sure that the dynamic libraries it wants to link
against are actually present.
TR> Then there is the whole issue of what non system dirs to
TR> include. Maybe you have OpenSSL 0.9.6g in /usr/local/ssl but
TR> you're testing 0.9.7 that's installed in some other dir. If
TR> setup.py automagicly adds ssl to build the '_socket'
TR> extension, how does it know which version to use? How would it
TR> even find the one not in /usr/local/ssl? Normally you would
TR> configure --with-ssl-dir=/some_path_to_ssl
I would hope that setup.py would match the library version with the
header version, but I'm sure it's not easy or foolproof. Look at the
machinations setup.py goes through to build bsddbmodule. I still
think it's best to do this so that Python has a chance of building out
of the box for the widest possible audience. It's impossible to get
100% right.
TR> As one who has done ports to many Open Source projects, I
TR> found python one of the more difficult ones because the build
TR> process uses python. So for a new platform (or broken build)
TR> you have to know python to build python.
Python's also a pretty complicated piece of software, what with each
extension module linking against non-standard libraries presenting its
own set of complications. But what tool that you can portably count
on being present would you use instead?
-Barry
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