Add function for initializing plugin resources for static builds

Also move the setting of default RCC_DIR into qtFlattenResources as we
need a valid RCC_DIR there.

Fixes: QTBUG-81699
Fixes: QTBUG-81713
Change-Id: I7558d99f3aca75d2e9cad0ec89fbb0aa0758dcc7
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

2 files changed, 46 insertions, 34 deletions

diff --git a/mkspecs/features/resources.prf b/mkspecs/features/resources.prf
index 6d9f27b86b..151051163d 100644
--- a/mkspecs/features/resources.prf
+++ b/mkspecs/features/resources.prf
@@ -1,6 +1,5 @@
 qtPrepareTool(QMAKE_RCC, rcc, _DEP)
 
-isEmpty(RCC_DIR):RCC_DIR = .
 isEmpty(QMAKE_MOD_RCC):QMAKE_MOD_RCC = qrc
 
 !contains(QMAKE_RESOURCE_FLAGS, -root):!isEmpty(QMAKE_RESOURCE_ROOT):QMAKE_RESOURCE_FLAGS += -root $$QMAKE_RESOURCE_ROOT
@@ -8,39 +7,7 @@ isEmpty(QMAKE_MOD_RCC):QMAKE_MOD_RCC = qrc
 
 load(resources_functions)
 qtFlattenResources()
-
-!isEmpty(RESOURCES):contains(TEMPLATE, .*lib):plugin:static {
-    pluginBaseName = $$basename(TARGET)
-    pluginName = $$lower($$replace(pluginBaseName, [-], _))
-    resource_init_function = $${pluginName}_plugin_resource_init
-    DEFINES += "QT_PLUGIN_RESOURCE_INIT_FUNCTION=$$resource_init_function"
-    RESOURCE_INIT_CPP = $$OUT_PWD/$${pluginName}_plugin_resources.cpp
-
-    GENERATED_SOURCES += $$RESOURCE_INIT_CPP
-    QMAKE_DISTCLEAN += $$RESOURCE_INIT_CPP
-
-    isEmpty(BUILDS)|build_pass {
-        RESOURCE_INIT_CONT = \
-            "// This file is autogenerated by qmake. It contains a function that" \
-            "// references all resources the plugin includes and the function is" \
-            "// referenced by Qt_(MOC_)EXPORT_PLUGIN to ensure the inclusion in" \
-            "// the statically linked plugin." \
-            "$${LITERAL_HASH}include <QtCore/qglobal.h>" \
-            "void $${resource_init_function}() " \
-            "{" \
-
-        for (resource, RESOURCES) {
-            resource_name = $$replace($$list($$basename(resource)),\.qrc$, )
-            resource_name = $$replace(resource_name, [^a-zA-Z0-9_], _)
-            RESOURCE_INIT_CONT += "    Q_INIT_RESOURCE($$resource_name);"
-        }
-
-        RESOURCE_INIT_CONT += \
-            "}"
-
-        write_file($$RESOURCE_INIT_CPP, RESOURCE_INIT_CONT)|error()
-    }
-}
+qtEnsurePluginResourcesCpp()
 
 rcc.input = RESOURCES
 rcc.name = RCC ${QMAKE_FILE_IN}
diff --git a/mkspecs/features/resources_functions.prf b/mkspecs/features/resources_functions.prf
index b7a15fd1d9..f0ca2ed793 100644
--- a/mkspecs/features/resources_functions.prf
+++ b/mkspecs/features/resources_functions.prf
@@ -9,6 +9,7 @@ defineReplace(xml_escape) {
 }
 
 defineTest(qtFlattenResources) {
+    isEmpty(RCC_DIR):RCC_DIR = .
     immediate = qmake_immediate$$QMAKE_RESOURCES_IMMEDIATE_NR
     defined(QMAKE_RESOURCES_IMMEDIATE_NR, var): \
         QMAKE_RESOURCES_IMMEDIATE_NR = $$num_add($$QMAKE_RESOURCES_IMMEDIATE_NR, 1)
@@ -72,9 +73,53 @@ defineTest(qtFlattenResources) {
         RESOURCES -= $$resource
         RESOURCES += $$resource_file
     }
+    export(RCC_DIR)
     export(QMAKE_RESOURCES_IMMEDIATE_NR)
     export(RESOURCES)
     export(OTHER_FILES)
     export($${immediate}.files)
     return(true)
 }
+
+defineTest(qtEnsurePluginResourcesCpp) {
+    contains(DEFINES, QT_PLUGIN_RESOURCE_INIT_FUNCTION=.*): \
+        return(true)
+
+    !isEmpty(RESOURCES):contains(TEMPLATE, .*lib):plugin:static {
+        pluginBaseName = $$basename(TARGET)
+        pluginName = $$lower($$replace(pluginBaseName, [-], _))
+        resource_init_function = $${pluginName}_plugin_resource_init
+        DEFINES += "QT_PLUGIN_RESOURCE_INIT_FUNCTION=$$resource_init_function"
+        RESOURCE_INIT_CPP = $$OUT_PWD/$${pluginName}_plugin_resources.cpp
+
+        GENERATED_SOURCES += $$RESOURCE_INIT_CPP
+        QMAKE_DISTCLEAN += $$RESOURCE_INIT_CPP
+
+        isEmpty(BUILDS)|build_pass {
+            RESOURCE_INIT_CONT = \
+                "// This file is autogenerated by qmake. It contains a function that" \
+                "// references all resources the plugin includes and the function is" \
+                "// referenced by Qt_(MOC_)EXPORT_PLUGIN to ensure the inclusion in" \
+                "// the statically linked plugin." \
+                "$${LITERAL_HASH}include <QtCore/qglobal.h>" \
+                "void $${resource_init_function}() " \
+                "{" \
+
+            for (resource, RESOURCES) {
+                resource_name = $$replace($$list($$basename(resource)),\.qrc$, )
+                resource_name = $$replace(resource_name, [^a-zA-Z0-9_], _)
+                RESOURCE_INIT_CONT += "    Q_INIT_RESOURCE($$resource_name);"
+            }
+
+            RESOURCE_INIT_CONT += \
+                "}"
+
+            write_file($$RESOURCE_INIT_CPP, RESOURCE_INIT_CONT)|error()
+        }
+
+        export(DEFINES)
+        export(GENERATED_SOURCES)
+        export(QMAKE_DISTCLEAN)
+    }
+    return(true)
+}