[Kde-games-devel] What defines __KDE_HAVE_GCC_VISIBILITY? was: Build system changes: new library libkdegamesprivate

[Albert Astals Cid]

El Dissabte, 19 de maig de 2012, a les 14:13:41, Ian Wadham va escriure:
> On 13/05/2012, at 6:58 AM, Stefan Majewsky wrote:
> > On Sun, May 6, 2012 at 6:55 AM, Ian Wadham <iandw.au at gmail.com> wrote:
> >> I am seriously held up by this and that means that Avnee and Roney will
> >> soon be held up, too.
> > 
> > Fixed now?
> 
> No, it *was* not.  And I have just lost two more days … :-(  However, I have
> beaten the build into submission and now I am compiling and building on
> Apple again.
> 
> The problem was that the macros KDEGAMES_EXPORT and KDE_EXPORT
> evaluated to null strings in my system.  Consequently, although libkdegames
> would compile and build, none of the symbols were visible to any of the
> games programs or dependent libraries, so I was continually getting
> undefined symbols when linking.
> 
> KDE_EXPORT is defined in <prefix>/include/kdemacros.h by:
> 
> #ifdef __KDE_HAVE_GCC_VISIBILITY
> #define KDE_NO_EXPORT __attribute__ ((visibility("hidden")))
> #define KDE_EXPORT __attribute__ ((visibility("default")))
> #define KDE_IMPORT __attribute__ ((visibility("default")))
> #elif defined(_WIN32) || defined(_WIN64)
> #define KDE_NO_EXPORT
> #define KDE_EXPORT __declspec(dllexport)
> #define KDE_IMPORT __declspec(dllimport)
> #else
> #define KDE_NO_EXPORT
> #define KDE_EXPORT
> #define KDE_IMPORT
> #endif
> 
> Somehow __KDE_HAVE_GCC_VISIBILITY was not defined in my system, although
> __GNUC__ evaluates to 4.  So where, in KDE, is __KDE_HAVE_GCC_VISIBILITY
> defined (it is not in kdemacros.h)?  And, if there is neither GCC visibility
> nor Windows, should not KDE_EXPORT evaluate to some sensible default or
> something uncompileable?
> 
> My "fix" has been to use "add_definitions (-D__KDE_HAVE_GCC_VISIBILITY)" in
> kdegames/CMakeLists.txt, but that is obviously not portable.
> 
> Any ideas?

__KDE_HAVE_GCC_VISIBILITY is defined by kdemacros.h that originates from 
kdelibs

Albert

> 
> Cheers, Ian W.
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