Trent Nelson added the comment:
On Tue, Sep 18, 2012 at 06:40:35AM -0700, Trent Nelson wrote:
> Side bar design question: on BSD/Linux/OSX w/ gcc/clang, if you're on
> an amd64 platform, you'll get a 64-bit build. This isn't the case for
> Solaris, HP-UX and AIX -- the default is always 32-bit. You need
> aforementioned gymnastics to coerce a 64-bit build.
>
> Is this by design? If so, then I guess I'm proposing that ./configure
> should have a `--with-64`-type argument that'll generate a 64-bit
> build.
>
> If not, then we need to decide whether to change the default behavior
> such that ./configure always generates a 64-bit build if you're on a
> 64-bit platform -- if you want a 32-bit build, you need to explicitly
> tell ./configure (i.e. --with-32).
>
> Changing the default is probably only viable for 3.4 onwards. It'd be
> nice if 2.7->3.3 had generic configure support for 64-bit builds
> though (via --with-64).
>
> XXX TODO for trent: review autoconf's offerings... getting 64-bit
> builds from vendor cc's can't be that unusual.
Just wanted to make note of a precedent I noticed yesterday whilst
coercing local builds of Tcl, expect and a few other things on the
Solaris 10 SPARC box: they all use `--enable-64bit` as the arg to
configure to enable 64-bit builds.
Additionally, none of them default to 64-bit out-of-the-box; they
all inherit the underlying compilers "default" behavior. Which
means gcc/clang gets you 64-bit on amd64, but a cc build on a
64-bit host may not. (I need to check a few more permutations on
this, like what happens with gcc on SPARC/IA64 etc if the host OS
is 64-bit -- does it default to 64-bit?)
Side note: some of those projects had *much* nicer autoconf-fu
than we do. Tcl implements the --enable-64bit stuff in aclocal.m4.
So, I'm changing my stance from what I quoted above. We should try
mimic the precedent set by other projects:
- Use --enable-64bit as the flag.
- "Default" 64-bit builds depend on the underlying compiler.
----------
title: Improve ./configure's support for 32/64-bit debug|release|profiled
builds w/ vendor (non-gcc) compilers on proprietary UNIX systems
(Solaris/HP-UX/AIX et al). -> Improve ./configure's support for 32/64-bit
debug|release|profiled builds w/ vendor (non-gcc) compilers on proprietary
UNIX systems (Solaris/HP-UX/AIX et al).
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15963>
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