[Cmake] gtk-config / pkg-config

[Mathieu Malaterre]

Hi all,
	I needed to test my class wxVTKRenderWindowInteractor:
http://www.creatis.insa-lyon.fr/~malaterre/wxVTK/

with GTK2 so I rewrote FindGTK.cmake (based on FindwxWindow) like this:

#######
IF(WIN32)
...

ELSE(WIN32)

   FIND_PROGRAM(CMAKE_PKG_CONFIG pkg-config ../gtk/bin ../../gtk/bin)
   IF(CMAKE_PKG_CONFIG)
      SET(CMAKE_GTK_CXX_FLAGS "`${CMAKE_PKG_CONFIG} --cflags gtk+-2.0`")
      SET(GTK_LIBRARIES "`${CMAKE_PKG_CONFIG} --libs gtk+-2.0`")
   ELSE(CMAKE_PKG_CONFIG)
      FIND_PROGRAM(CMAKE_GTK_CONFIG gtk-config ../gtk/bin ../../gtk/bin)
      SET(CMAKE_GTK_CXX_FLAGS "`${CMAKE_GTK_CONFIG} --cxxflags`")
      SET(GTK_LIBRARIES "`${CMAKE_GTK_CONFIG} --libs`")
   ENDIF(CMAKE_PKG_CONFIG)
ENDIF(WIN32)

MARK_AS_ADVANCED(
   CMAKE_GTK_CXX_FLAGS
   GTK_INCLUDE_DIR
)

IF(GTK_LIBRARIES)
   IF(CMAKE_GTK_CXX_FLAGS)
     SET(GTK_FOUND 1)
   ENDIF(CMAKE_GTK_CXX_FLAGS)
ENDIF(GTK_LIBRARIES)
#######

This take advantage of pkg-config which should replace *-config tool. See:
http://www.freedesktop.org/software/pkgconfig/

But I am stuck:
- I would like the user to choose either if he wants GTK 1.x or GTK 2.x 
but I don't know how to handle this.

- Furthermore, the user should not be able to use GTK 2.x if pkg-config 
can't be found (only gtk-config was found). There will be also some 
problems if pkg-config is not in the path and is specified later...

Thanks for your suggestions,

mathieu


-- 
Mathieu Malaterre
CREATIS
28 Avenue du Doyen LEPINE
B.P. Lyon-Montchat
69394 Lyon Cedex 03
http://www.creatis.insa-lyon.fr/~malaterre/