how sensitive is mod_ssl.c to compiler and OS?

I have a number of apache/mod_ssl servers
deployed on solaris2.6, compiled with Sun's
compiler.

My dev environment is solaris8, with later
version of Sun's C compiler.

Can I expect that compiling the latest mod
on sol8 will work on sol2.6?


Just how sensitive is apxs/dso to compiler
and OS version? I know that sol8 had an
extra library or two that I might need to
patch sol2.6 with, and I need to check 32/64bit
and cpu type directives; but what else?


What about compiling the module with gcc on
solaris2.6 and loading that in a Sun C compiled
apache? (since I no longer have a licensed
Sun compiler on a 2.6 machine)


I realise I'm covering a lot of ground here,
(Solaris, Apache, compilers, dynamic loading)

But since mod_ssl is the particular thing I'm
upgrading, I hope this list would have some
ready answers/experiences to share.

Regards
Matt

PS wouldn't it be a nice feature for apxs to
also report the environment (PATH) and other
things that influenced the build of the original
apache and modules?
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