Fix CTF with static build

- Do not require feature library
- Load static plugin

Change-Id: I6c3ec72e20b9f2800c1d350dac795fccbb8c381e
Reviewed-by: Janne Koskinen <janne.p.koskinen@qt.io>
Reviewed-by: Antti Määttä <antti.maatta@qt.io>

src/corelib/CMakeLists.txt

@@ -1341,7 +1341,7 @@ qt_internal_extend_target(Core CONDITION WASM
         kernel/qeventdispatcher_wasm.cpp kernel/qeventdispatcher_wasm_p.h
 )
 
-qt_internal_extend_target(Core CONDITION QT_FEATURE_ctf AND QT_FEATURE_library
+qt_internal_extend_target(Core CONDITION QT_FEATURE_ctf
     SOURCES
         tracing/qctf_p.h tracing/qctf.cpp
     PLUGIN_TYPES

src/corelib/tracing/qctf.cpp

@@ -7,6 +7,7 @@
 #include <qpluginloader.h>
 #include <qfileinfo.h>
 #include <qdir.h>
+#include <qjsonarray.h>
 
 #include "qctf_p.h"
 
@@ -18,6 +19,8 @@ static bool s_prevent_recursion = false;
 static bool s_shutdown = false;
 static QCtfLib* s_plugin = nullptr;
 
+#if QT_CONFIG(library) && defined(QT_SHARED)
+
 #if defined(Q_OS_ANDROID)
 static QString findPlugin(const QString &plugin)
 {
@@ -64,6 +67,30 @@ static bool loadPlugin(bool &retry)
     return true;
 }
 
+#else
+
+#define QCtfPluginIID QStringLiteral("org.qt-project.Qt.QCtfLib")
+
+static bool loadPlugin(bool &retry)
+{
+    retry = false;
+    const auto &plugins = QPluginLoader::staticPlugins();
+    for (const auto &plugin : plugins) {
+        const auto json = plugin.metaData();
+        const auto IID = json[QStringLiteral("IID")];
+        if (IID.toString() == QCtfPluginIID) {
+            s_plugin = qobject_cast<QCtfLib *>(plugin.instance());
+            if (!s_plugin)
+                return false;
+            s_plugin->shutdown(&s_shutdown);
+            return true;
+        }
+    }
+    return false;
+}
+
+#endif
+
 static bool initialize()
 {
     if (s_shutdown || s_prevent_recursion)

src/corelib/tracing/qctf_p.h

@@ -19,8 +19,6 @@
 #include <qtcoreexports.h>
 #include <qobject.h>
 
-QT_REQUIRE_CONFIG(library);
-
 QT_BEGIN_NAMESPACE
 
 struct QCtfTraceMetadata;

src/plugins/CMakeLists.txt

@@ -25,6 +25,6 @@ if (TARGET Qt::Network)
     add_subdirectory(networkinformation)
     add_subdirectory(tls)
 endif()
-if (QT_FEATURE_ctf AND QT_FEATURE_library)
+if (QT_FEATURE_ctf AND TARGET Qt::Network)
     add_subdirectory(tracing)
 endif()

src/plugins/tracing/CMakeLists.txt

@@ -12,14 +12,13 @@ endfunction(make_includable)
 make_includable(metadata_template.txt metadata_template.h)
 
 qt_internal_add_plugin(QCtfTracePlugin
-    SHARED
     CLASS_NAME QCtfTracePlugin
     PLUGIN_TYPE tracing
     SOURCES
         qctflib_p.h qctflib.cpp metadata_template.txt qctfplugin.cpp qctfplugin_p.h
         qctfserver_p.h qctfserver.cpp
     LIBRARIES
-        Qt6::Core Qt6::CorePrivate Qt6::Network
+        Qt::Core Qt::CorePrivate Qt::Network
 )
 
 qt_internal_extend_target(QCtfTracePlugin CONDITION QT_FEATURE_zstd