[CMake] Finding cairo_gl libraries with cmake

[Carlos Lopez Gonzalez]

Hi,
I'm asking for help on how to find cairo_gl libraries with cmake at the cairo mailing lists.
Maybe someone can help with finding libraries that are installed in custom folder linke it is my case.
Thanks!


>
>---------- Forwarded message ----------
>From: Carlos López González <genetita at gmail.com>
>Date: 2012/12/26
>Subject: Finding cairo_gl libraries with cmake
>To: cairo at cairographics.org
>
>
>
>Hi!
>I'm working on create a small application sample to use a cairo_gl surface on a GtkWindow.
>For my system configuration (OSX 10.7.5 with XCode 4.5.2) I'm using cmake.
>
>
>First I did this:
>1) Download latest release and build it with gl enabled
>$ wget http://cairographics.org/releases/cairo-1.12.8.tar.xz
>$ tar -xvf cairo-1.12.8.tar.xz
>$ cd cairo-1.12.8
>$ ./configure --prefix=/Users/carlos/Software/cairo/ --enable-gl=yes
>$ make
>$ make install
>
>
>At configure time I checked that Opengl was enabled:
>
>
>OpenGL:        yes
>
>
>I checked that the installed cairo libraries has cairo-gl.h header.
>
>
>Then I created a CMakeLists.txt for the project (it consists in a single c file)
>with the following content:
>
>
>project(cairo-sample)
>cmake_minimum_required(VERSION 2.6)
>
>
>find_package(PkgConfig REQUIRED)
>pkg_check_modules(GTK2 REQUIRED gtk+-2.0)
>
>
>include_directories(${GTK2_INCLUDE_DIRS})
>link_directories(${GTK2_LIBRARY_DIRS})
>add_definitions(${GTK2_CFLAGS_OTHER})
>
>
># Here I add the cairo paths and libraries manually
>set(CAIRO_INCLUDE_DIRS "/Users/carlos/Software/cairo/include/cairo")
>set(CAIRO_LIBRARY_DIRS "/Users/carlos/Software/cairo/lib")
>set(CAIRO_LIBRARIES cairo gl)
>
>
># Need to add the path BEFORE because it will override the default from GTK
>include_directories(BEFORE ${CAIRO_INCLUDE_DIRS})
>link_directories(${CAIRO_LIBRARY_DIRS})
>
>
>add_executable(cairo-sample cairo_sample.c)
>
>target_link_libraries(cairo-sample ${CAIRO_LIBRARIES} ${GTK2_LIBRARIES})
>
>
>
>
>Then I run cmake-gui and configure to produce a XCode project with default settings.
>Then I open the produced project in XCode and it complains at link time:
>
>
>Ld /Users/carlos/Software/my-test-area/my-test-area/build/Debug/cairo-sample normal x86_64
>    cd /Users/carlos/Software/my-test-area/my-test-area/src
>    setenv MACOSX_DEPLOYMENT_TARGET 10.7
>    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk -L/Users/carlos/Software/my-test-area/my-test-area/build/Debug -L/opt/local/lib/Debug -L/opt/local/lib -L/Users/carlos/Software/cairo/lib/Debug -L/Users/carlos/Software/cairo/lib -F/Users/carlos/Software/my-test-area/my-test-area/build/Debug -filelist /Users/carlos/Software/my-test-area/my-test-area/build/cairo-sample.build/Debug/cairo-sample.build/Objects-normal/x86_64/cairo-sample.LinkFileList -mmacosx-version-min=10.7 -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lcairo -lgl -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lpangocairo-1.0 -lXext -lXrender -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lgdk_pixbuf-2.0 -lpangoft2-1.0 -lgio-2.0 -lXfixes -lcairo -lX11 -lpango-1.0 -lm -lfreetype -lfontconfig -lgobject-2.0
 -lglib-2.0 -lintl -lgl -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lpangocairo-1.0 -lXext -lXrender -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lgdk_pixbuf-2.0 -lpangoft2-1.0 -lgio-2.0 -lXfixes -lX11 -lpango-1.0 -lm -lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0 -lintl -o /Users/carlos/Software/my-test-area/my-test-area/build/Debug/cairo-sample
>
>
>ld: warning: directory not found for option '-L/opt/local/lib/Debug'
>ld: warning: directory not found for option '-L/Users/carlos/Software/cairo/lib/Debug'
>Undefined symbols for architecture x86_64:
>  "_cairo_gl_context_destroy", referenced from:
>      _on_expose_event in cairo_sample.o
>  "_cairo_gl_surface_create_for_window", referenced from:
>      _on_expose_event in cairo_sample.o
>  "_cairo_gl_surface_swapbuffers", referenced from:
>      _on_expose_event in cairo_sample.o
>  "_cairo_glx_device_create", referenced from:
>      _cairo_sample_gl_context_create in cairo_sample.o
>ld: symbol(s) not found for architecture x86_64
>clang: error: linker command failed with exit code 1 (use -v to see invocation)
>
>
>
>
>I've tried to specify cairo-gl for CAIRO_LIBRARIES variable but it complains telling me this:
>
>
>ld: library not found for -lcairo-gl
>
>
>All code can be found here:
>https://github.com/genete/my-test-area.git
>
>
>
>I would appreciate any help to allow XCode to find the installed cairo-gl libraries.
>Thanks!-- 
>Carlos
>http://synfig.org
>
>
>
>
>-- 
>Carlos
>http://synfig.org
>
>
>
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