cmake: add possibility to use locally built (not installed) grx library

If grx was build locallay and exported itself, ev3devKit should now find the local build of grx and use it instead of using pkg-config to find grx.

Author: dlech

CMakeLists.txt

@@ -21,11 +21,8 @@ set (EV3DEVKIT_PACKAGE ${PROJECT_NAME}-${GIR_VERSION})
 set (LIBRARY_NAME "${EV3DEVKIT_PACKAGE}")
 set (TARGET_GLIB "2.40")
 
-if (PARENT_DIR)
-    # If this is included by a parent project, export some variables back to the parent
-    set (${PROJECT_NAME}_PACKAGE ${EV3DEVKIT_PACKAGE} PARENT_SCOPE)
-    set (${PROJECT_NAME}_VAPI ${EV3DEVKIT_PACKAGE}.vapi PARENT_SCOPE)
-endif (PARENT_DIR)
+# see if we have a local copy of grx-3.0 that was exported by cmake
+find_package (grx-3.0 QUIET)
 
 add_subdirectory (data)
 set (XDG_DATA_DIR data)
@@ -50,10 +47,22 @@ set (COMMON_MODULES
     glib-2.0
     gmodule-2.0
     gobject-2.0
-    grx-3.0
     gudev-1.0
 )
 
+# if we have a local build of grx-3.0, use it, otherwise use pkg-config to find it
+if (grx-3.0_FOUND)
+    set(GRX3_INCLUDEDIR ${grx-3.0_INCLUDEDIR})
+    set(GRX3_SHARED_LIB grx-3.0-shared)
+    set(GRX3_STATIC_LIB grx-3.0-static)
+    set(GRX3_VAPIDIR_OPTION "--vapidir=${grx-3.0_VAPIDIR}")
+    set(GRX3_GIRDIR_OPTION "--girdir=${grx-3.0_GIRDIR}")
+    set(GRX3_INCLUDEDIR_OPTION "--includedir=${grx-3.0_GIRDIR}")
+    set(GRX3_PLUGINDIR_ENV "GRX_PLUGIN_PATH=${grx-3.0_PLUGINDIR}")
+else (grx-3.0_FOUND)
+    list(APPEND COMMON_MODULES grx-3.0)
+endif (grx-3.0_FOUND)
+
 configure_file (src/Version.vala.in Version.vala)
 # convert CMake list to space separated string for pkgconfig file
 string(REPLACE ";" " " PKGCONFIG_DEPS "${COMMON_MODULES}")
@@ -137,6 +146,8 @@ CUSTOM_VAPIS
     bindings/*.vapi
 OPTIONS
     --target-glib=${TARGET_GLIB}
+    ${GRX3_VAPIDIR_OPTION}
+    ${GRX3_GIRDIR_OPTION}
 GENERATE_VAPI
     ${EV3DEVKIT_PACKAGE}
 GENERATE_HEADER
@@ -175,6 +186,7 @@ add_custom_command (
         "--shared-library=$<TARGET_SONAME_FILE_NAME:${LIBRARY_NAME}-shared>"
         "--output=${CMAKE_CURRENT_BINARY_DIR}/${GIR_NAME}-${GIR_VERSION}.typelib"
         "--includedir=${CMAKE_CURRENT_BINARY_DIR}"
+        ${GRX3_INCLUDEDIR_OPTION}
     DEPENDS
         "${LIBRARY_NAME}-shared"
         "${CMAKE_CURRENT_BINARY_DIR}/${GIR_NAME}-${GIR_VERSION}.gir"
@@ -191,15 +203,16 @@ add_custom_target ("${LIBRARY_NAME}-typelib"
 # end of workaround
 
 add_library(${LIBRARY_NAME} OBJECT ${LIBRARY_VALA_C})
+target_include_directories(${LIBRARY_NAME} PRIVATE ${GRX3_INCLUDEDIR})
 set_target_properties(${LIBRARY_NAME} PROPERTIES POSITION_INDEPENDENT_CODE 1)
 add_library(${LIBRARY_NAME}-shared SHARED $<TARGET_OBJECTS:${LIBRARY_NAME}>)
-target_link_libraries(${LIBRARY_NAME}-shared ${DEPS_LIBRARIES})
+target_link_libraries(${LIBRARY_NAME}-shared ${DEPS_LIBRARIES} ${GRX3_SHARED_LIB})
 set_target_properties(${LIBRARY_NAME}-shared PROPERTIES
     VERSION "${VERSION}"
     SOVERSION "${SOVERSION}"
     OUTPUT_NAME ${LIBRARY_NAME})
 add_library(${LIBRARY_NAME}-static STATIC $<TARGET_OBJECTS:${LIBRARY_NAME}>)
-target_link_libraries(${LIBRARY_NAME}-static ${DEPS_LIBRARIES})
+target_link_libraries(${LIBRARY_NAME}-static ${DEPS_LIBRARIES} ${GRX3_STATIC_LIB})
 set_target_properties(${LIBRARY_NAME}-static PROPERTIES
     OUTPUT_NAME ${LIBRARY_NAME})
 add_dependencies(${LIBRARY_NAME} ev3devkit_data)
@@ -227,9 +240,12 @@ if (EV3DEVKIT_BUILD_DEMO)
     OPTIONS
         --target-glib=${TARGET_GLIB}
         --vapidir=${CMAKE_CURRENT_BINARY_DIR}
+        ${GRX3_VAPIDIR_OPTION}
+        ${GRX3_GIRDIR_OPTION}
     )
 
     add_executable (${DEVICES_DEMO_EXEC_NAME} ${DEVICES_DEMO_EXEC_VALA_C})
+    target_include_directories (${DEVICES_DEMO_EXEC_NAME} PRIVATE ${GRX3_INCLUDEDIR})
     target_link_libraries (${DEVICES_DEMO_EXEC_NAME} ${EXEC_LIBRARY_DEPENDS})
     if (CMAKE_CROSSCOMPILING)
         # These are not picked up automatically when cross compiling for some reason
@@ -258,9 +274,12 @@ if (EV3DEVKIT_BUILD_DEMO)
     OPTIONS
         --target-glib=${TARGET_GLIB}
         --vapidir=${CMAKE_CURRENT_BINARY_DIR}
+        ${GRX3_VAPIDIR_OPTION}
+        ${GRX3_GIRDIR_OPTION}
     )
 
     add_executable (${UI_DEMO_EXEC_NAME} ${UI_DEMO_EXEC_VALA_C})
+    target_include_directories (${UI_DEMO_EXEC_NAME} PRIVATE ${GRX3_INCLUDEDIR})
     target_link_libraries (${UI_DEMO_EXEC_NAME} ${EXEC_LIBRARY_DEPENDS})
     if (CMAKE_CROSSCOMPILING)
         # These are not picked up automatically when cross compiling for some reason
@@ -270,6 +289,7 @@ if (EV3DEVKIT_BUILD_DEMO)
     add_custom_target (run-${UI_DEMO_EXEC_NAME}
         COMMAND
             XDG_DATA_DIRS=${XDG_DATA_DIR}:/usr/local/share:/usr/share
+            ${GRX3_PLUGINDIR_ENV}
             ./${UI_DEMO_EXEC_NAME}
         DEPENDS ${UI_DEMO_EXEC_NAME}
         WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
@@ -291,6 +311,7 @@ if (VALADOC_FOUND)
         ${GIR_VERSION}
     OPTIONS
         --target-glib=${TARGET_GLIB}
+        ${GRX3_VAPIDIR_OPTION}
     PACKAGES
         ${COMMON_PACKAGES}
     )