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Date: Thu, 13 Mar 2014 10:22:38 +0100
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: fltk check or enum quest
References: <5320A22C DOT 20006 AT gmail DOT com> <5320C90D DOT 2000609 AT tiscali DOT co DOT uk>
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On 12/03/2014 21:52, David Stacey wrote:
> On 12/03/2014 18:06, Marco Atzeri wrote:
>> I am hitting a gcc/fltk craziness, and I have no clue what to look for.
>>
>> The attached example is extracted from octave configure log,
>> and I am almost sure that nor the test nor the fltk header
>> are changed at all recently.
>>
>
> The problem is that the enumerations in FL/Enumerations.H are using the
> C++ style syntax, and the conftest source code has the '.c' extension,
> so gcc treats it as C.
>
> The C++ syntax for an enumeration is as follows:
>
>      enum EColours { eRed, eGreen, eBlue };
>
> The C syntax for an enumeration is as follows:
>
>      typedef enum { eRed, eGreen, eBlue } EColours;
>
> You have two options. Either patch FL/Enumerations.H to use the C syntax
> (there are also a number of C++ style comments that you may have to
> change). Or, change the test to write out a file with a '.cpp'
> extension, invoke g++ and drop the -Wimplicit-function-declaration (as
> this is not valid for C++).
>
> Hope this helps,
>
> Dave.

thanks very much.
At least I have a starting point

As FLTK is a C++ GUI toolkit, I start to suspect that the test was 
always wrongly designed, and only recently automake/autoconf/gcc
started to reject it.


Marco






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