Make it possible to use static builds of Qt with CMake.

Parse the prl files generated by qmake to get the link dependencies. They
contain all the information we need, and they are the only location with
all the right information.

Change-Id: Id9dcc988f20a744297502eff008de085326cdbcf
Reviewed-by: Brad King <brad.king@kitware.com>
Reviewed-by: Clinton Stimpson <clinton@elemtech.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

mkspecs/cmake/Qt5BasicConfig.cmake.in

@@ -67,62 +67,48 @@ endif()
 set(_Qt5$${CMAKE_MODULE_NAME}_LIB_DEPENDENCIES \"$${CMAKE_QT5_MODULE_DEPS}\")
 
 !!IF !isEmpty(CMAKE_STATIC_TYPE)
-# For static builds, we also list the dependencies of
-# Qt so that consumers can build.
 
-!!IF isEqual(CMAKE_MODULE_NAME, Core)
+if (NOT Qt5_EXCLUDE_STATIC_DEPENDENCIES)
+    # For static builds, we also list the dependencies of
+    # Qt so that consumers can build easily.
 
-set(_Qt5Core_LIB_DEPENDENCIES)
+    macro(macro_process_prl_file prl_file_location Configuration)
-!!IF contains(QT_CONFIG, system-zlib)
+        if (EXISTS \"${prl_file_location}\")
-find_package(ZLIB REQUIRED)
+            file(STRINGS \"${prl_file_location}\" prl_strings REGEX \"QMAKE_PRL_LIBS\")
-list(APPEND _Qt5Core_LIB_DEPENDENCIES ${ZLIB_LIBRARIES})
+            string(REGEX REPLACE \"QMAKE_PRL_LIBS *= *([^\\n]*)\" \"\\\\1\" static_depends ${prl_strings} )
+            string(STRIP ${static_depends} static_depends)
+            if (_Qt5$${CMAKE_MODULE_NAME}_LIB_DEPENDENCIES)
+                set(_list_sep \";\")
+            endif()
+            set(_Qt5$${CMAKE_MODULE_NAME}_STATIC_${Configuration}_LIB_DEPENDENCIES \"${_list_sep}${static_depends}\")
+        endif()
+    endmacro()
+
+!!IF !isEmpty(CMAKE_DEBUG_TYPE)
+!!IF isEmpty(CMAKE_LIB_DIR_IS_ABSOLUTE)
+    macro_process_prl_file(\"${_qt5$${CMAKE_MODULE_NAME}_install_prefix}/$${CMAKE_LIB_DIR}$${CMAKE_PRL_FILE_LOCATION_DEBUG}\" DEBUG)
+!!ELSE
+    macro_process_prl_file(\"$${CMAKE_LIB_DIR}$${CMAKE_PRL_FILE_LOCATION_DEBUG}\" DEBUG)
+!!ENDIF
 !!ENDIF
 
-!!IF contains(QT_CONFIG, glib)
+!!IF !isEmpty(CMAKE_RELEASE_TYPE)
-find_library(QT_GLIB_LIBRARY NAMES glib-2.0 )
+!!IF isEmpty(CMAKE_LIB_DIR_IS_ABSOLUTE)
-find_library(QT_GTHREAD_LIBRARY NAMES gthread-2.0 )
+    macro_process_prl_file(\"${_qt5$${CMAKE_MODULE_NAME}_install_prefix}/$${CMAKE_LIB_DIR}$${CMAKE_PRL_FILE_LOCATION_RELEASE}\" RELEASE)
-mark_as_advanced(QT_GLIB_LIBRARY)
+!!ELSE
-mark_as_advanced(QT_GTHREAD_LIBRARY)
+    macro_process_prl_file(\"$${CMAKE_LIB_DIR}$${CMAKE_PRL_FILE_LOCATION_RELEASE}\" RELEASE)
-list(APPEND _Qt5Core_LIB_DEPENDENCIES ${QT_GTHREAD_LIBRARY} ${QT_GLIB_LIBRARY})
+!!ENDIF
 !!ENDIF
 
-!!IF contains(QT_CONFIG, clock-monotonic)
-find_library(QT_RT_LIBRARY NAMES rt)
-mark_as_advanced(QT_RT_LIBRARY)
-list(APPEND _Qt5Core_LIB_DEPENDENCIES ${QT_RT_LIBRARY})
-!!ENDIF
-
-set(CMAKE_THREAD_PREFER_PTHREADS 1)
-find_package(Threads)
-if(CMAKE_USE_PTHREADS_INIT)
-  list(APPEND _Qt5Core_LIB_DEPENDENCIES ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
 endif()
 
-!!ENDIF # Core
-
-!!IF isEqual(CMAKE_MODULE_NAME, Gui)
-
-set(_Qt5Gui_LIB_DEPENDENCIES)
-
-!!IF contains(QT_CONFIG, system-png)
-find_package(PNG REQUIRED)
-list(APPEND _Qt5Gui_LIB_DEPENDENCIES ${PNG_LIBRARIES})
-!!ENDIF
-
-!!IF contains(QT_CONFIG, system-jpeg)
-find_package(JPEG REQUIRED)
-list(APPEND _Qt5Gui_LIB_DEPENDENCIES ${JPEG_LIBRARIES})
-!!ENDIF
-
-!!ENDIF # Gui
-
 !!ENDIF # Static
 
 macro(_populate_imported_target_properties Configuration LIB_LOCATION IMPLIB_LOCATION)
     set_property(TARGET Qt5::$${CMAKE_MODULE_NAME} APPEND PROPERTY IMPORTED_CONFIGURATIONS ${Configuration})
 
     set_target_properties(Qt5::$${CMAKE_MODULE_NAME} PROPERTIES
-        \"IMPORTED_LINK_INTERFACE_LIBRARIES_${Configuration}\" \"${_Qt5$${CMAKE_MODULE_NAME}_LIB_DEPENDENCIES}\"
+        \"IMPORTED_LINK_INTERFACE_LIBRARIES_${Configuration}\" \"${_Qt5$${CMAKE_MODULE_NAME}_LIB_DEPENDENCIES}${_Qt5$${CMAKE_MODULE_NAME}_STATIC_${Configuration}_LIB_DEPENDENCIES}\"
 !!IF isEmpty(CMAKE_LIB_DIR_IS_ABSOLUTE)
         \"IMPORTED_LOCATION_${Configuration}\" \"${_qt5$${CMAKE_MODULE_NAME}_install_prefix}/$${CMAKE_LIB_DIR}${LIB_LOCATION}\"
 !!ELSE

mkspecs/features/create_cmake.prf

@@ -64,6 +64,9 @@ macx {
     !isEmpty(CMAKE_STATIC_TYPE) {
         CMAKE_LIB_FILE_LOCATION_DEBUG = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}_debug.a
         CMAKE_LIB_FILE_LOCATION_RELEASE = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.a
+
+        CMAKE_PRL_FILE_LOCATION_DEBUG = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}_debug.prl
+        CMAKE_PRL_FILE_LOCATION_RELEASE = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.prl
     } else {
         CONFIG(qt_framework, qt_framework|qt_no_framework) {
             CMAKE_LIB_FILE_LOCATION_DEBUG = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.framework/Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}
@@ -100,6 +103,9 @@ macx {
         !isEmpty(CMAKE_STATIC_TYPE) {
             CMAKE_IMPLIB_FILE_LOCATION_DEBUG = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}d.lib
             CMAKE_IMPLIB_FILE_LOCATION_RELEASE = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.lib
+
+            CMAKE_PRL_FILE_LOCATION_DEBUG = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}d.prl
+            CMAKE_PRL_FILE_LOCATION_RELEASE = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.prl
         } else {
             CMAKE_IMPLIB_FILE_LOCATION_DEBUG = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}d$$eval(QT.$${MODULE}.MAJOR_VERSION).lib
             CMAKE_IMPLIB_FILE_LOCATION_RELEASE = Qt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}$$eval(QT.$${MODULE}.MAJOR_VERSION).lib
@@ -109,6 +115,8 @@ macx {
     !isEmpty(CMAKE_STATIC_TYPE) {
         CMAKE_LIB_FILE_LOCATION_DEBUG = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.a
         CMAKE_LIB_FILE_LOCATION_RELEASE = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.a
+        CMAKE_PRL_FILE_LOCATION_DEBUG = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.prl
+        CMAKE_PRL_FILE_LOCATION_RELEASE = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.prl
     } else {
         CMAKE_LIB_FILE_LOCATION_DEBUG = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.so.$$eval(QT.$${MODULE}.VERSION)
         CMAKE_LIB_FILE_LOCATION_RELEASE = libQt$${CMAKE_MODULE_NAME}$${QT_LIBINFIX}.so.$$eval(QT.$${MODULE}.VERSION)