meson: Create and use a dependency for libcamera and its headers

Instead of manually adding the libcamera library and include path to
every target that requires it, declare a dependency that groups the
headers as source, the library and the include path, and use it through
the project. This simplifies handling of the dependency.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/meson.build

@@ -65,3 +65,7 @@ libcamera = shared_library('camera',
                            install : true,
                            include_directories : includes,
                            dependencies : libudev)
+
+libcamera_dep = declare_dependency(sources : libcamera_api,
+                                   include_directories : libcamera_includes,
+                                   link_with : libcamera)