[FEATURE] make desktop build optional (but default; fixes #4756)

Author: jef-n

CMakeLists.txt

@@ -39,6 +39,8 @@ IF (WITH_GRASS)
   SET (GRASS_PREFIX ${GRASS_PREFIX} CACHE PATH "Path to GRASS base directory")
 ENDIF (WITH_GRASS)
 
+SET (WITH_DESKTOP TRUE CACHE BOOL "Determines whether QGIS desktop should be built")
+
 # mapserver by us disabled default because it needs FastCGI (which is optional dependency)
 SET (WITH_MAPSERVER FALSE CACHE BOOL "Determines whether QGIS mapserver should be built")
 
@@ -134,8 +136,6 @@ ENDIF(NOT WIN32 AND NOT ANDROID)
 
 # required
 FIND_PACKAGE(Proj)
-FIND_PACKAGE(Expat)    # GPS importer plugin
-FIND_PACKAGE(GSL)      # Georeferencer
 FIND_PACKAGE(GEOS)
 FIND_PACKAGE(GDAL)
 
@@ -186,7 +186,9 @@ SET(QT_USE_QTXML 1)
 SET(QT_USE_QTNETWORK 1)
 SET(QT_USE_QTSVG 1)
 SET(QT_USE_QTSQL 1)
-SET(QT_USE_QTWEBKIT 1)
+IF(WITH_DESKTOP)
+  SET(QT_USE_QTWEBKIT 1)
+ENDIF(WITH_DESKTOP)
 
 IF (NOT QT_QTXML_FOUND OR NOT QT_QTNETWORK_FOUND OR NOT QT_QTSVG_FOUND OR NOT QT_QTSQL_FOUND OR NOT QT_QTWEBKIT_FOUND)
   MESSAGE(SEND_ERROR "Some Qt4 modules haven't been found!")

src/CMakeLists.txt

@@ -2,12 +2,15 @@ ADD_SUBDIRECTORY(core)
 ADD_SUBDIRECTORY(analysis)
 ADD_SUBDIRECTORY(ui)
 ADD_SUBDIRECTORY(gui)
-ADD_SUBDIRECTORY(app)
 ADD_SUBDIRECTORY(providers)
-ADD_SUBDIRECTORY(plugins)
-ADD_SUBDIRECTORY(helpviewer)
 ADD_SUBDIRECTORY(crssync)
-ADD_SUBDIRECTORY(browser)
+
+IF (WITH_DESKTOP)
+  ADD_SUBDIRECTORY(app)
+  ADD_SUBDIRECTORY(helpviewer)
+  ADD_SUBDIRECTORY(browser)
+  ADD_SUBDIRECTORY(plugins)
+ENDIF(WITH_DESKTOP)
 
 IF (WITH_BINDINGS)
   ADD_SUBDIRECTORY(python)

src/plugins/CMakeLists.txt

@@ -14,6 +14,8 @@ ADD_SUBDIRECTORY(spatialquery)
 ADD_SUBDIRECTORY(sqlanywhere)
 ADD_SUBDIRECTORY(roadgraph)
 ADD_SUBDIRECTORY(zonal_statistics)
+ADD_SUBDIRECTORY(georeferencer)
+ADD_SUBDIRECTORY(gps_importer)
 
 IF (WITH_SPATIALITE)
   ADD_SUBDIRECTORY(offline_editing)
@@ -23,20 +25,12 @@ IF (POSTGRES_FOUND)
   ADD_SUBDIRECTORY(spit)
 ENDIF (POSTGRES_FOUND)
 
-IF (EXPAT_FOUND)
-  ADD_SUBDIRECTORY(gps_importer)
-ENDIF (EXPAT_FOUND)
-
-IF (GSL_FOUND)
-  ADD_SUBDIRECTORY(georeferencer)
-ENDIF (GSL_FOUND)
-
 IF (GRASS_FOUND)
   ADD_SUBDIRECTORY(grass)
 ENDIF (GRASS_FOUND)
 
-IF (OSGEARTH_FOUND)
+IF (WITH_GLOBE)
   ADD_SUBDIRECTORY(globe)
-ENDIF (OSGEARTH_FOUND)
+ENDIF (WITH_GLOBE)
 
 # headers installed in qgis_core target

src/plugins/georeferencer/CMakeLists.txt

@@ -1,3 +1,7 @@
+FIND_PACKAGE(GSL)      # Georeferencer
+
+IF(GSL_FOUND)
+
 ########################################################
 # Files
 
@@ -91,3 +95,5 @@ TARGET_LINK_LIBRARIES(georefplugin
 INSTALL(TARGETS georefplugin
   RUNTIME DESTINATION ${QGIS_PLUGIN_DIR}
   LIBRARY DESTINATION ${QGIS_PLUGIN_DIR})
+
+ENDIF(GSL_FOUND)

src/plugins/gps_importer/CMakeLists.txt

@@ -1,3 +1,6 @@
+FIND_PACKAGE(Expat)    # GPS importer plugin
+
+IF(EXPAT_FOUND)
 
 ########################################################
 # Files
@@ -57,3 +60,5 @@ TARGET_LINK_LIBRARIES(gpsimporterplugin
 INSTALL(TARGETS gpsimporterplugin
   RUNTIME DESTINATION ${QGIS_PLUGIN_DIR}
   LIBRARY DESTINATION ${QGIS_PLUGIN_DIR})
+
+ENDIF(EXPAT_FOUND)