[bug #16436] Cairo-back compilation fails with new release of Cairo-1.0.4 due to API instability

[Alex Perez]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=16436>

                 Summary: Cairo-back compilation fails with new release of
Cairo-1.0.4 due to API instability
                 Project: GNUstep
            Submitted by: aperez
            Submitted on: Tuesday 04/25/06 at 04:42
                Category: Backend
                Severity: 4 - Important
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: FredKiefer
             Open/Closed: Open

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Details:

Compiling GNUstep-back-cairo with new release of cairo version 1.0.4:


First of all, to get it to compile at all, I have to fiddle a bit with some
includes in CairoFontInfo.h. It appears that the Cairo folks have switched to
using Freetype Macro names for includes instead of the previous way of
directly importing header files. I had to add the the following to
CairoFontInfo.h to get Cairo to compile:
"
#include <ft2build.h>
#include FT_FREETYPE_H

However, the FT_FREETYPE_H macro is defined in a header file which resides in
/usr/include/freetype2 on my system, which I manually added to the Cairo
GNUmakefile.preamble in the ADDITIONAL_INCLUDE_DIRS section. This is not the
way it should be done, I realize. GNUstep-back's Configure script should be
sticking that there depending on where the freetype headers reside on any
given system. The GNUstep-back configure script does find all my freetype
libs and headers fine, so it's strange that this isn't already happening.

On to compilation...

Fails with glitz, due to removed or renamed Glitz macros, notably
GLITZ_FORMAT_OPTION_ONSCREEN_MASK,  GLITZ_FORMAT_OPTION_NO_MULTISAMPLE_MASK,
and GLITZ_FORMAT_OPTION_SINGLEBUFFER_MASK.

And yes, I have the glitz library and headers installed on my machine.

The exact compilation error I get when compiling gsback-cairo with Glitz on
is:
"Compiling file XGCairoGlitzSurface.m ...
XGCairoGlitzSurface.m: In function ‘-[XGCairoGlitzSurface
initWithDevice:]’:
XGCairoGlitzSurface.m:35: error: ‘GLITZ_FORMAT_OPTION_ONSCREEN_MASK’
undeclared (first use in this function)
XGCairoGlitzSurface.m:35: error: (Each undeclared identifier is reported only
once
XGCairoGlitzSurface.m:35: error: for each function it appears in.)
XGCairoGlitzSurface.m:51: error:
‘GLITZ_FORMAT_OPTION_NO_MULTISAMPLE_MASK’ undeclared (first use in this
function)XGCairoGlitzSurface.m:52: error:
‘GLITZ_FORMAT_OPTION_SINGLEBUFFER_MASK’ undeclared (first use in this
function)
XGCairoGlitzSurface.m:54: warning: implicit declaration of function
‘glitz_glx_find_standard_format’
XGCairoGlitzSurface.m:57: warning: assignment makes pointer from integer
without a cast
XGCairoGlitzSurface.m:65: warning: implicit declaration of function
‘glitz_glx_get_visual_info_from_format’
XGCairoGlitzSurface.m:67: warning: assignment makes pointer from integer
without a cast
XGCairoGlitzSurface.m:82: warning: implicit declaration of function
‘cairo_glitz_surface_create’
XGCairoGlitzSurface.m:82: warning: implicit declaration of function
‘glitz_glx_surface_create’
XGCairoGlitzSurface.m:85: warning: assignment makes pointer from integer
without a cast
XGCairoGlitzSurface.m:33: warning: unused variable ‘cm’
make[3]: *** [shared_obj/XGCairoGlitzSurface.o] Error 1"

I get much further when using --disable-glitz: The compilation completes
successfully, but I get only one warning:
"Compiling file CairoFontInfo.m ...
CairoFontInfo.m: In function ‘_cairo_extents_for_NSGlyph’:
CairoFontInfo.m:183: warning: implicit declaration of function
‘cairo_scaled_font_text_extents’"

Which then results in a symbol lookup error at runtime:
"/usr/GNUstep/System/Applications/Gorm.app/Gorm: symbol lookup error:
/usr/GNUstep/System/Library/Bundles/libgnustep-back-010.bundle/./libgnustep-back-010:
undefined symbol: cairo_scaled_font_text_extents"

Once again, looks like some more API instability to fix on our side.








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