[Python-Dev] _sre as part of python.dll

[Martin v. Löwis]

Guido van Rossum <guido@python.org> writes:

> I never have to do that; the dependencies in the project file make
> sure that the extensions are all built when you build the 'python'
> project.

Are you sure? If the python target is up-to-date (i.e. nothing has to
be done for python_d.exe), and I delete all generated _sre files
(i.e. sre_d.pyd, and the object files), and then ask VC++ 6 to build
the python target, nothing is done.

Indeed, I cannot find any place where it says that the python target
is related to _sre. I can only see dependencies with pythoncore.

Can you (or any other regular pcbuild.dsp user) please guess what I'm
doing wrong?

> Maybe _sre is used by most apps (though I doubt even that).  But
> _socket, select, winreg, mmap and the others are definitely not.  On
> Unix, all extensions are built as shared libraries, except the ones
> that are needed by setup.py to be able to build extensions; it looks
> like only posix, errno, _sre and symtable are built statically.

I do believe that is a mistake, as it will increase startup time of
applications that need them; applications that don't need them would
not be hurt if they were in the python binary.

> I'd say that making more extensions static on Windows would increase
> start time of modules that don't use those extensions.

I guess I have to measure these things.

Regards,
Martin