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Re: Question about duplicate C++ functions generated with GNU 3.4.1
- From: Nathan Sidwell <nathan at codesourcery dot com>
- To: Jon Watson <j-watson at airvananet dot com>
- Cc: gcc-help at gcc dot gnu dot org
- Date: Tue, 23 Nov 2004 15:40:03 +0000
- Subject: Re: Question about duplicate C++ functions generated with GNU 3.4.1
- Organization: Codesourcery LLC
- References: <41B9D8A6CE9E0A4583291742EECF3CCB03CA5EBF@mail.wirelessworld.airvananet.com>
Jon Watson wrote:
Hi -
We recently switched to GCC 3.4.1 (built for PowerPC EABI). As we have started to recompile our code and bring up our products we noticed some odd behavior. Specifically, it appears that GCC has created two functionally identical copies of C++ object constructors that are referenced by different symbols...
Symbols for BufferPool::BufferPool():
00002c78 T _ZN10BufferPoolC2Ev ./..\..\..\..\..\..\..\..\..\airvana\sw\ne\src\net\BufferPool\src\BufferPool.cpp:91
00002c88 T _ZN10BufferPoolC1Ev ./..\..\..\..\..\..\..\..\..\airvana\sw\ne\src\net\BufferPool\src\BufferPool.cpp:91
It is to do with ctors-for-most-derived and ctors-for-base. Refer
to the ABI document (linked to from Further Readings) for details. I thought
there qas a faq or something about it, but I cannot find it right now.
There is a bug report pointing out that, where virtual bases are not involved,
these two things are the same.
nathan
--
Nathan Sidwell :: http://www.codesourcery.com :: CodeSourcery LLC
nathan@codesourcery.com :: http://www.planetfall.pwp.blueyonder.co.uk