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Message-ID: <5320C90D.2000609@tiscali.co.uk>
Date: Wed, 12 Mar 2014 20:52:29 +0000
From: David Stacey <drstacey AT tiscali DOT co DOT uk>
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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>
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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.


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