Re: [Gegl-developer] Problem running GEGL hello-world example

The example program uses a gegl:display op. The issue you're running
into is that you didn't compile gegl against any libraries that can
provide the display op.

You can fix this by either compiling gegl with SDL support (there are
SDL binaries for windows online, so that shouldn't be too difficult to
set up), or by modifying the example to save a png file instead of
trying to display a window (I'd recommend you try this anyway, if
you're trying to learn gegl's api).

Feel free to post back with any more questions you have.

On Sat, Mar 30, 2013 at 5:46 PM, ChristophK <christoph kobenetz de> wrote:
GEGL-0.2.0 on Window 7 64bit / mingw32 / msys


after compiling GEGL I'm trying to run the hello-world example and get
the following errors:

christoph HTPC /k/daten/programmierung/libraries/gegl-0.2.0/examples
$ export GEGL_PATH=/k/daten/programmierung/libraries/gegl-0.2.0/

christoph HTPC /k/daten/programmierung/libraries/gegl-0.2.0/examples
$ ./hello-world.exe
GEGL-geglmodule.c-Message: Module
'k:/daten/programmierung/libraries/gegl-0.2.0\ gegl\.libs
\libgegl-0.2-0.dll' load error: Missing gegl_module_query() symbol

(hello-world.exe:2980): GEGL-display.c-WARNING **: No display handler
operation found for gegl:display

(hello-world.exe:2980): GEGL-gegl-operation-context.c-WARNING **:
gegl_operation _context_take_object: No paramspec found for pad
'output' on "gegl:display"

... same message repeated many times ...

(hello-world.exe:1132): GEGL-gegl-operation-context.c-WARNING **:
gegl_operation _context_take_object: No paramspec found for pad
'output' on "gegl:display"

EEEEeEeek! 2 GeglBuffers leaked
christoph HTPC /k/daten/programmierung/libraries/gegl-0.2.0/examples

That's what happened during configure:

Building GEGL with prefix=/usr/local

Optional features:
  GEGL docs:       yes
  Build workshop:  no
  Build website:   no  (asciidoc not found)
  SIMD:            sse:yes mmx:yes
  Vala support:    no  (vapigen executable not found)

Optional dependencies:
  asciidoc:        no  (asciidoc not found)
  enscript:        no  (enscript not found)
  Ruby:            no
  Lua:             no  (usable lua not found)
  Cairo:           yes
  Pango:           yes
  pangocairo:      yes
  GDKPixbuf:       yes
  JPEG:            yes
  PNG:             yes
  OpenEXR:         no  (OpenEXR library not found)
  rsvg:            no  (usable librsvg not found)
  SDL:             no  (SDL library not found)
  openraw:         no  (openraw library not found)
  Jasper:          no  (jasper library not found)
  graphviz:        no  (graphviz not found)
  avformat:        no  (libavformat not found)
  V4L:             no
  spiro:           no  (usable SPIRO library not found)
  EXIV:            no  (exiv2 library not found)
  umfpack:         no  (usable umfpack library not found)

christoph HTPC /k/daten/programmierung/libraries/gegl-0.2.0

What do I have to do to make the hello-world example work?

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