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Re: Multilib support

From: Tzu-Chien Chiu
Subject: Re: Multilib support
Date: Thu, 21 Sep 2006 21:36:59 +0800

Thank you. You're right. It has nothing to do with multilib.

I've read and of texinfo. Here is how it works.
When cross-compiling, the same configure script is run twice for all
sub-directories of source directory., however, selectively only
builds some or all of these sub-directories depending upon if set TOOLS_ONLY
is set by the configure script. When building native tools, the variables
CC, AR, and RANLIB copied from the their BUILD_* environment variable

The users have to manually set BUILD_CC, BUILD_AR, BUILD_RANLIB before
running 'configure', right? I thought there would be AC_PROG_*-like macros
for these?

2006/9/21, Stepan Kasal <address@hidden>:


  Ralf Corsepius has answered the question about AM_ENABLE_MULTILIB,
and then, on Thu, Sep 21, 2006 at 09:52:25AM +0200, he wrote:

> > I need to build *both* the native and the cross-compiled library
> > at the same time (one-time configure script and make), rather than
> > *either one* of them.
> This is a completely different problem and not related to multilibs at
> all.  [...]
> What you are looking for is simultaneously building for the build system
> (native) and for the host (cross). Only very few packages support this.
> autoconf/automake doesn't support it by themselves.

my previous answer targeted this second problem (as I do not have
any experience with multilib).

I'm guess the basic tools packages, like binutils and gcc, have to
support a ``bootstrap'' which involves this.  But these packages are
too complex.

That's why I suggested to study texinfo/ (from version
4.8 or newer), which does build a couple of native tools, which are
then needed for the main cross-platform build.

Texinfo is a smaller package, and thus should serve as a more
comprehensive example.  Feel free to ask me about the details of it.

        Stepan Kasal

Tzu-Chien Chiu - SMedia Technology Corp.

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