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[Bug libstdc++/18644] [3.3/3.4/4.0 regression] -Wsynth warning in <complex>
- From: "bangerth at ices dot utexas dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Nov 2004 04:33:05 -0000
- Subject: [Bug libstdc++/18644] [3.3/3.4/4.0 regression] -Wsynth warning in <complex>
- References: <20041124043902.18644.bangerth@dealii.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From bangerth at ices dot utexas dot edu 2004-11-26 04:33 -------
Subject: Re: [3.3/3.4/4.0 regression] -Wsynth warning
in <complex>
> The issue is not taking the address of the copy constructor, but the
> change in calling convention. It you declare a copy consttuctor, you
> change the ABI in the sense that the compiler is now forced to pass
> everything in stack, where it used to pass it in register.
Ah, ok, I didn't know about these subtleties.
> The diagnostic is nonsensical. The fix is to fix the diagnostic, not
> to paper over the problem.
That's certainly the best solution. -Wsynth should just not trigger in
libstdc++ headers.
Thanks
W.
-------------------------------------------------------------------------
Wolfgang Bangerth email: bangerth@ices.utexas.edu
www: http://www.ices.utexas.edu/~bangerth/
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18644