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Re: difference between gcc 2.9x and 3.x
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From: |
James Kanze |
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Subject: |
Re: difference between gcc 2.9x and 3.x |
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Date: |
Sat, 19 Mar 2005 17:11:25 +0100 |
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User-agent: |
Mozilla Thunderbird 1.0 (X11/20041206) |
Christian Christmann wrote:
> I want to convert a project which can be compiled with g++ 2.9
> to g++ 3.x.
> When I run the code against g++ 3.2 I get lots of errors.
> What changed from g++ 2.9 to 3.x?
The language that it compiles.
> Where can I get some information about that topic?
Check out any of the C++ news groups. ISO made a number of
incompatible changes in the specification of the language,
compared to what was current practice before. Most vendors have
followed a policy of gradual upgrade with options to support
older constructs, but g++ apparently expects you to go cold
turkey.
Most of the changes should result in a compiler error, but there
are a few cases where the results can be that the code still
compiles, but with subtle changes in the semantics. So I hope
you have good regression tests.
--
James Kanze home: www.gabi-soft.fr
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