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Date: Thu, 24 Apr 2014 14:48:02 -0500
From: "Yaakov (Cygwin/X)" <yselkowitz AT users DOT sourceforge DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: ambiguous overload for operator [] on Cygwin_X86-64
References: <510697 DOT 35308 DOT qm AT web101119 DOT mail DOT kks DOT yahoo DOT co DOT jp>
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On 2014-04-23 22:15, Tatsuro MATSUOKA wrote:
> I tried to build wxWidgets-3.0.0 on Cygwin.
> For Cygwin x86, the build was successful.
>
> However, on Cygwin x86_64, the build failed at compling a cpp source file (src/common/appbase.cpp).
>
> ./include/wx/filename.h: In static member function 'static wxUniChar wxFileName::GetPathSeparator(wxPathFormat)':
> ./include/wx/filename.h:473:43: error: ambiguous overload for 'operator[]' (operand types are 'wxString' and 'unsigned int')
>           { return GetPathSeparators(format)[0u]; }
>
> The code "(format)[0u]" seemed to be accepted g++-4.8.2 on Cygwin x86_64.
> What the difference of g++ between that of  Cygwin x86 and that of Cygwin x86_64?

wxWidgets requires several patches to build and/or run correctly on 
Cygwin/X.  I haven't looked at 3.0 yet, but for 2.8 this issue is fixed 
in my 2.8.12-cygwin64.patch:

http://sourceforge.net/p/cygwin-ports/wxWidgets2.8/


Yaakov
Cygwin/X


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