1 files changed, 65 insertions, 0 deletions
diff --git a/src/corelib/global/qtsymbolmacros.h b/src/corelib/global/qtsymbolmacros.h
new file mode 100644
index 0000000000..18cdc85f72
--- /dev/null
+++ b/src/corelib/global/qtsymbolmacros.h
@@ -0,0 +1,65 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QTSYMBOLMACROS_H
+#define QTSYMBOLMACROS_H
+
+#if 0
+#  pragma qt_sync_stop_processing
+#endif
+
+// For GHS symbol keeping.
+#include <QtCore/qcompilerdetection.h>
+#include <QtCore/qtpreprocessorsupport.h>
+
+// For handling namespaced resources.
+#ifdef QT_NAMESPACE
+#  define QT_RCC_MANGLE_NAMESPACE0(x) x
+#  define QT_RCC_MANGLE_NAMESPACE1(a, b) a##_##b
+#  define QT_RCC_MANGLE_NAMESPACE2(a, b) QT_RCC_MANGLE_NAMESPACE1(a,b)
+#  define QT_RCC_MANGLE_NAMESPACE(name) QT_RCC_MANGLE_NAMESPACE2( \
+        QT_RCC_MANGLE_NAMESPACE0(name), QT_RCC_MANGLE_NAMESPACE0(QT_NAMESPACE))
+#else
+#   define QT_RCC_MANGLE_NAMESPACE(name) name
+#endif
+
+// GHS needs special handling to keep a symbol around.
+#if defined(Q_CC_GHS)
+#  define Q_GHS_KEEP_REFERENCE(S) QT_DO_PRAGMA(ghs reference S ##__Fv)
+#else
+#  define Q_GHS_KEEP_REFERENCE(S)
+#endif
+
+// Macros to ensure a symbol is not dropped by the linker even if it's not used.
+#define QT_DECLARE_EXTERN_SYMBOL(NAME, RETURN_TYPE) \
+    extern RETURN_TYPE NAME(); \
+    Q_GHS_KEEP_REFERENCE(NAME)
+
+#define QT_DECLARE_EXTERN_SYMBOL_INT(NAME) \
+    QT_DECLARE_EXTERN_SYMBOL(NAME, int)
+
+#define QT_DECLARE_EXTERN_SYMBOL_VOID(NAME) \
+    QT_DECLARE_EXTERN_SYMBOL(NAME, void)
+
+#define QT_KEEP_SYMBOL_VAR_NAME(NAME) NAME ## _keep
+
+#define QT_KEEP_SYMBOL_HELPER(NAME, VAR_NAME) \
+    volatile auto VAR_NAME = &NAME; \
+    Q_UNUSED(VAR_NAME)
+
+#define QT_KEEP_SYMBOL(NAME) \
+    QT_KEEP_SYMBOL_HELPER(NAME, QT_KEEP_SYMBOL_VAR_NAME(NAME))
+
+
+// Similar to the ones above, but for rcc resource symbols specifically.
+#define QT_GET_RESOURCE_INIT_SYMBOL(NAME) \
+    QT_RCC_MANGLE_NAMESPACE(qInitResources_ ## NAME)
+
+#define QT_DECLARE_EXTERN_RESOURCE(NAME) \
+    QT_DECLARE_EXTERN_SYMBOL_INT(QT_GET_RESOURCE_INIT_SYMBOL(NAME))
+
+#define QT_KEEP_RESOURCE(NAME) \
+    QT_KEEP_SYMBOL(QT_GET_RESOURCE_INIT_SYMBOL(NAME))
+
+#endif // QTSYMBOLMACROS_H
+