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Re: ABI incompatibilities with MinGW GCC 4.7.0

From: Jason Rumney
Subject: Re: ABI incompatibilities with MinGW GCC 4.7.0
Date: Sat, 09 Jun 2012 11:10:20 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

> The upshot of this, AFAIU, is that the MinGW GCC 4.7.0 should NOT be
> used for building Emacs on Windows with any of the optional libraries,
> such as image libraries, GnuTLS, libxml2, etc., because _all_ of those
> libraries were compiled with versions of GCC before 4.7.0, and are now
> ABI incompatible with code compiled by 4.7.0.

Has anyone actually tried?

As far as I can see, it should only affect interfaces that use bitfields, and
C++.  All the libraries that Emacs uses are Free software, so can be
rebuilt with the same compiler if neccesary.

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