From 104839fbd3dd9f1265772f9ce4996262c79251da Mon Sep 17 00:00:00 2001
From: "falktx@falktx.com" <falkTX>
Date: Sat, 10 Aug 2024 20:12:07 +0200
Subject: [PATCH] Allow building with Qt6

Signed-off-by: falktx@falktx.com <falkTX>
---
 source/Makefile.deps.mk  | 122 ++++++++++++++++++++++++++++-----------
 source/frontend/Makefile |  39 +++++--------
 source/theme/Makefile    | 120 ++++++++++++--------------------------
 3 files changed, 138 insertions(+), 143 deletions(-)

diff --git a/source/Makefile.deps.mk b/source/Makefile.deps.mk
index 027f81e86..9d6bc3733 100644
--- a/source/Makefile.deps.mk
+++ b/source/Makefile.deps.mk
@@ -261,31 +261,59 @@ endif
 endif
 
 # ---------------------------------------------------------------------------------------------------------------------
-# Set Qt tools
+# Set Qt tools, part1
 
 ifeq ($(HAVE_QT4),true)
 MOC_QT4 ?= $(shell $(PKG_CONFIG) --variable=moc_location QtCore)
 RCC_QT4 ?= $(shell $(PKG_CONFIG) --variable=rcc_location QtCore)
-ifeq (,$(wildcard $(MOC_QT4)))
-HAVE_QT4 = false
-endif
-ifeq (,$(wildcard $(RCC_QT4)))
-HAVE_QT4 = false
-endif
+QT4_CXX_FLAGS  = $(BUILD_CXX_FLAGS) $(shell pkg-config --cflags QtCore QtGui)
+QT4_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) $(shell pkg-config --libs QtCore QtGui)
+QT4_STYLES_DIR = $(shell pkg-config --variable=libdir QtCore)/qt4/plugins/styles
 endif
 
 ifeq ($(HAVE_QT5),true)
-QT5_HOSTBINS = $(shell $(PKG_CONFIG) --variable=host_bins Qt5Core)
+QT5_HOSTBINS   = $(shell $(PKG_CONFIG) --variable=host_bins Qt5Core)
+QT5_PREFIX     = $(shell $(PKG_CONFIG) --variable=prefix Qt5Core)
+QT5_CXX_FLAGS  = $(shell $(PKG_CONFIG) --cflags Qt5Core Qt5Gui Qt5Widgets)
+QT5_LINK_FLAGS = -Wl,-rpath,$(QT5_PREFIX)/lib $(shell $(PKG_CONFIG) --libs Qt5Core Qt5Gui Qt5Widgets)
+QT5_STYLES_DIR = $(shell pkg-config --variable=libdir Qt5Core)/qt5/plugins/styles
 else ifeq ($(HAVE_QT5PKG),true)
-QT5_HOSTBINS = $(shell $(PKG_CONFIG) --variable=prefix Qt5OpenGLExtensions)/bin
+QT5_HOSTBINS   = $(shell $(PKG_CONFIG) --variable=prefix Qt5OpenGLExtensions)/bin
+QT5_PREFIX     = $(shell $(PKG_CONFIG) --variable=prefix Qt5OpenGLExtensions)
+QT5_CXX_FLAGS  = -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include/qt5
+QT5_LINK_FLAGS = -Wl,-rpath,$(QT5_PREFIX)/lib -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
+QT5_STYLES_DIR = $(QT5_PREFIX)/lib/qt5/plugins/styles
 else ifeq ($(HAVE_QT5BREW),true)
-QT5_HOSTBINS = /usr/local/opt/qt5/bin
+QT5_HOSTBINS   = /usr/local/opt/qt5/bin
+QT5_PREFIX     = /usr/local/opt/qt5
+QT5_CXX_FLAGS  = -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include
+QT5_LINK_FLAGS = -Wl,-rpath,$(QT5_PREFIX)/lib -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
+QT5_STYLES_DIR = $(QT5_PREFIX)/plugins/styles
+endif
+
+ifeq ($(HAVE_QT6),true)
+QT6_HOSTBINS   = $(shell $(PKG_CONFIG) --variable=libexecdir Qt6Core)
+QT6_PREFIX     = $(shell $(PKG_CONFIG) --variable=prefix Qt6Core)
+QT6_CXX_FLAGS  = $(shell $(PKG_CONFIG) --cflags Qt6Core Qt6Gui Qt6Widgets) -std=gnu++17
+QT6_LINK_FLAGS = -Wl,-rpath,$(QT6_PREFIX)/lib $(shell $(PKG_CONFIG) --libs Qt6Core Qt6Gui Qt6Widgets)
+QT6_STYLES_DIR = $(shell pkg-config --variable=libdir Qt6Core)/qt6/plugins/styles
 endif
 
 MOC_QT5 ?= $(QT5_HOSTBINS)/moc
 RCC_QT5 ?= $(QT5_HOSTBINS)/rcc
 UIC_QT5 ?= $(QT5_HOSTBINS)/uic
 
+MOC_QT6 ?= $(QT6_HOSTBINS)/moc
+RCC_QT6 ?= $(QT6_HOSTBINS)/rcc
+UIC_QT6 ?= $(QT6_HOSTBINS)/uic
+
+ifeq (,$(wildcard $(MOC_QT4)))
+HAVE_QT4 = false
+endif
+ifeq (,$(wildcard $(RCC_QT4)))
+HAVE_QT4 = false
+endif
+
 ifeq (,$(wildcard $(MOC_QT5)))
 HAVE_QT5 = false
 endif
@@ -296,27 +324,14 @@ ifeq (,$(wildcard $(UIC_QT5)))
 HAVE_QT5 = false
 endif
 
-ifeq ($(HAVE_QT6),true)
-QT6_HOSTBINS = $(shell $(PKG_CONFIG) --variable=libexecdir Qt6Core)
+ifeq (,$(wildcard $(MOC_QT6)))
+HAVE_QT6 = false
 endif
-
-MOC_QT6 ?= $(QT6_HOSTBINS)/moc
-RCC_QT6 ?= $(QT6_HOSTBINS)/rcc
-UIC_QT6 ?= $(QT6_HOSTBINS)/uic
-
-ifeq ($(HAVE_QT4),true)
-HAVE_QT = true
-else ifeq ($(HAVE_QT5),true)
-HAVE_QT = true
-else ifeq ($(HAVE_QT6),true)
-HAVE_QT = true
-# FIXME
-else ifeq ($(WINDOWS),true)
-HAVE_QT = true
+ifeq (,$(wildcard $(RCC_QT6)))
+HAVE_QT6 = false
 endif
-
-ifneq (,$(findstring true,$(HAVE_QT5)$(HAVE_QT5PKG)$(HAVE_QT5BREW)))
-HAVE_THEME = true
+ifeq (,$(wildcard $(UIC_QT6)))
+HAVE_QT6 = false
 endif
 
 # ---------------------------------------------------------------------------------------------------------------------
@@ -325,20 +340,54 @@ endif
 PYRCC5 ?= $(shell which pyrcc5 2>/dev/null)
 PYUIC5 ?= $(shell which pyuic5 2>/dev/null)
 
-ifneq ($(PYUIC5),)
-ifneq ($(PYRCC5),)
+PYUIC6 ?= $(shell which pyuic6 2>/dev/null)
+
+ifeq ($(HAVE_QT6),true)
+ifneq ($(PYUIC6),)
+HAVE_FRONTEND = true
 HAVE_PYQT = true
+FRONTEND_TYPE = 6
+endif
+endif
+
 ifneq (,$(findstring true,$(HAVE_QT5)$(HAVE_QT5PKG)$(HAVE_QT5BREW)))
+ifneq ($(PYUIC5)$(PYRCC5),)
 HAVE_FRONTEND = true
+HAVE_PYQT = true
+FRONTEND_TYPE = 5
 endif
 endif
+
+ifneq ($(PYUIC5)$(PYRCC5),)
+PYRCC ?= $(PYRCC5)
+PYUIC ?= $(PYUIC5)
+else ifneq ($(PYUIC6),)
+PYRCC ?= $(RCC_QT6) -g python
+PYUIC ?= $(PYRCC6)
 endif
 
 # ---------------------------------------------------------------------------------------------------------------------
-# Set PyQt tools, part2
+# Set Qt tools, part2
 
-PYRCC ?= $(PYRCC5)
-PYUIC ?= $(PYUIC5)
+ifneq (,$(findstring true,$(HAVE_QT4)$(HAVE_QT5)$(HAVE_QT5PKG)$(HAVE_QT5BREW)$(HAVE_QT6)))
+HAVE_QT = true
+endif
+
+ifeq ($(FRONTEND_TYPE),5)
+MOC = $(MOC_QT5)
+RCC = $(RCC_QT5)
+UIC = $(UIC_QT5)
+HAVE_THEME    = $(HAVE_QT5)
+QT_CXX_FLAGS  = $(QT5_CXX_FLAGS)
+QT_LINK_FLAGS = $(QT5_LINK_FLAGS)
+else ifeq ($(FRONTEND_TYPE),6)
+MOC = $(MOC_QT6)
+RCC = $(RCC_QT6)
+UIC = $(UIC_QT6)
+HAVE_THEME    = $(HAVE_QT6)
+QT_CXX_FLAGS  = $(QT6_CXX_FLAGS)
+QT_LINK_FLAGS = $(QT6_LINK_FLAGS)
+endif
 
 # ---------------------------------------------------------------------------------------------------------------------
 # Set USING_RTAUDIO
@@ -405,6 +454,11 @@ QT5_FLAGS = $(shell $(PKG_CONFIG) --cflags Qt5Core Qt5Gui Qt5Widgets)
 QT5_LIBS  = $(shell $(PKG_CONFIG) --libs Qt5Core Qt5Gui Qt5Widgets)
 endif
 
+ifeq ($(HAVE_QT6),true)
+QT6_FLAGS = $(shell $(PKG_CONFIG) --cflags Qt6Core Qt6Gui Qt6Widgets)
+QT6_LIBS  = $(shell $(PKG_CONFIG) --libs Qt6Core Qt6Gui Qt6Widgets)
+endif
+
 ifeq ($(WASM),true)
 HAVE_SDL  = true
 SDL_FLAGS = -sUSE_SDL=2
diff --git a/source/frontend/Makefile b/source/frontend/Makefile
index 44b7c1d24..0242d1ca2 100644
--- a/source/frontend/Makefile
+++ b/source/frontend/Makefile
@@ -21,7 +21,6 @@ endif
 # ---------------------------------------------------------------------------------------------------------------------
 
 BUILD_CXX_FLAGS += -I. -Iutils
-
 BUILD_CXX_FLAGS += -I../backend
 BUILD_CXX_FLAGS += -I../includes
 BUILD_CXX_FLAGS += -I../modules
@@ -30,38 +29,26 @@ BUILD_CXX_FLAGS += -I../utils
 # ---------------------------------------------------------------------------------------------------------------------
 
 ifeq ($(WINDOWS),true)
-QT5_LINK_FLAGS = $(shell echo $(LINK_FLAGS) | awk 'sub(" -static","")')
+NON_STATIC_LINK_FLAGS = $(shell echo $(LINK_FLAGS) | awk 'sub(" -static","")') -static-libgcc
 else
-QT5_LINK_FLAGS = $(LINK_FLAGS)
+NON_STATIC_LINK_FLAGS = $(LINK_FLAGS)
 endif
 
-ifeq ($(HAVE_QT5),true)
-QT5_PREFIX       = $(shell $(PKG_CONFIG) --variable=prefix Qt5Core)
-BUILD_CXX_FLAGS += $(shell $(PKG_CONFIG) --cflags Qt5Core Qt5Gui Qt5Widgets)
-QT5_LINK_FLAGS  += -Wl,-rpath,$(QT5_PREFIX)/lib $(shell $(PKG_CONFIG) --libs Qt5Core Qt5Gui Qt5Widgets)
-else ifeq ($(HAVE_QT5PKG),true)
-QT5_PREFIX       = $(shell $(PKG_CONFIG) --variable=prefix Qt5OpenGLExtensions)
-BUILD_CXX_FLAGS += -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include/qt5
-QT5_LINK_FLAGS  += -Wl,-rpath,$(QT5_PREFIX)/lib -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
-else ifeq ($(HAVE_QT5BREW),true)
-QT5_PREFIX       = /usr/local/opt/qt5
-BUILD_CXX_FLAGS += -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include
-QT5_LINK_FLAGS  += -Wl,-rpath,$(QT5_PREFIX)/lib -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
-else
-$(error Trying to build frontend without Qt5, cannot continue)
+ifeq (,$(FRONTEND_TYPE))
+$(error Trying to build frontend without Qt and/or PyQt, cannot continue)
 endif
 
 ifeq ($(WINDOWS),true)
-QT5_LINK_FLAGS += -L$(BINDIR) $(BINDIR)/libcarla_utils.dll
+QT_LINK_FLAGS += -L$(BINDIR) $(BINDIR)/libcarla_utils.dll
 else
-QT5_LINK_FLAGS += -L$(BINDIR) -lcarla_utils
+QT_LINK_FLAGS += -L$(BINDIR) -lcarla_utils
 endif
 
 ifeq ($(MACOS),true)
-QT5_LINK_FLAGS += -install_name @rpath/libcarla_frontend.dylib
+QT_LINK_FLAGS += -install_name @rpath/libcarla_frontend.dylib
 # FIXME this does not work: -Wl,-rpath,@loader_path
 else
-QT5_LINK_FLAGS += -Wl,-rpath,'$${ORIGIN}'
+QT_LINK_FLAGS += -Wl,-rpath,'$${ORIGIN}'
 endif
 
 # ---------------------------------------------------------------------------------------------------------------------
@@ -167,10 +154,10 @@ all: $(BINDIR)/libcarla_frontend$(LIB_EXT) $(QMs) $(RES) $(UIs)
 # ---------------------------------------------------------------------------------------------------------------------
 
 dialogs/ui_%.h: dialogs/%.ui
-	$(UIC_QT5) $< -o $@
+	$(UIC) $< -o $@
 
 pluginlist/ui_%.h: pluginlist/%.ui
-	$(UIC_QT5) $< -o $@
+	$(UIC) $< -o $@
 
 %_ui.py: %.ui
 	$(PYUIC) $< -o $@
@@ -183,7 +170,7 @@ resources_rc.py: $(RESDIR)/resources.qrc $(RESDIR)/*/*.png $(RESDIR)/*/*.svg $(R
 
 test: $(OBJS) $(LIBS) test.cpp
 	@echo "Linking test"
-	$(SILENT)$(CXX) $(OBJS) test.cpp $(BUILD_CXX_FLAGS) -Wl,-rpath,$(abspath $(BINDIR)) $(QT5_LINK_FLAGS) -o $@
+	$(SILENT)$(CXX) $(OBJS) test.cpp $(BUILD_CXX_FLAGS) $(NON_STATIC_LINK_FLAGS) -Wl,-rpath,$(abspath $(BINDIR)) $(QT_LINK_FLAGS) -o $@
 
 $(BINDIR)/resources/%: %
 	-@mkdir -p $(BINDIR)/resources
@@ -202,7 +189,7 @@ $(BINDIR)/resources/zynaddsubfx-ui: ../native-plugins/resources/zynaddsubfx-ui
 $(BINDIR)/libcarla_frontend$(LIB_EXT): $(OBJS) $(LIBS)
 	-@mkdir -p $(BINDIR)
 	@echo "Linking libcarla_frontend$(LIB_EXT)"
-	$(SILENT)$(CXX) $(OBJS) $(BUILD_CXX_FLAGS) $(QT5_LINK_FLAGS) $(SHARED) -o $@
+	$(SILENT)$(CXX) $(OBJS) $(BUILD_CXX_FLAGS) $(QT_CXX_FLAGS) $(NON_STATIC_LINK_FLAGS) $(QT_LINK_FLAGS) $(SHARED) -o $@
 ifeq ($(MACOS),true)
 # FIXME this does not work: -Wl,-rpath,@loader_path
 	$(SILENT)install_name_tool -change ../../../bin/libcarla_utils.dylib @loader_path/libcarla_utils.dylib $@
@@ -211,7 +198,7 @@ endif
 $(OBJDIR)/%.cpp.o: %.cpp $(UIs)
 	-@mkdir -p $(shell dirname $@)
 	@echo "Compiling $<"
-	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT_CXX_FLAGS) -c -o $@
 
 -include $(OBJS:%.o=%.d)
 
diff --git a/source/theme/Makefile b/source/theme/Makefile
index 302f2eef8..7f375824f 100644
--- a/source/theme/Makefile
+++ b/source/theme/Makefile
@@ -16,40 +16,6 @@ else
 NON_STATIC_LINK_FLAGS = $(LINK_FLAGS)
 endif
 
-ifeq ($(HAVE_QT4),true)
-QT4_CXX_FLAGS  = $(BUILD_CXX_FLAGS) $(shell pkg-config --cflags QtCore QtGui)
-QT4_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) $(shell pkg-config --libs QtCore QtGui)
-QT4_STYLES_DIR = $(shell pkg-config --variable=libdir QtCore)/qt4/plugins/styles
-endif
-
-ifeq ($(HAVE_QT5),true)
-QT5_CXX_FLAGS  = $(BUILD_CXX_FLAGS) $(shell pkg-config --cflags Qt5Core Qt5Gui Qt5Widgets)
-QT5_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) $(shell pkg-config --libs Qt5Core Qt5Gui Qt5Widgets)
-QT5_STYLES_DIR = $(shell pkg-config --variable=libdir Qt5Core)/qt5/plugins/styles
-else ifeq ($(HAVE_QT5PKG),true)
-ifeq ($(MACOS),true)
-ifeq ($(HAVE_PYQT),true)
-HAVE_QT5       = true
-QT5_PREFIX     = $(shell pkg-config --variable=prefix Qt5OpenGLExtensions)
-QT5_CXX_FLAGS  = $(BUILD_CXX_FLAGS) -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include/qt5
-QT5_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
-QT5_STYLES_DIR = $(QT5_PREFIX)/lib/qt5/plugins/styles
-endif
-endif
-else ifeq ($(HAVE_QT5BREW),true)
-HAVE_QT5       = true
-QT5_PREFIX     = /usr/local/opt/qt5
-QT5_CXX_FLAGS  = $(BUILD_CXX_FLAGS) -DQT_CORE_LIB -DQT_GUI_LIB -DQT_WIDGETS_LIB -I $(QT5_PREFIX)/include
-QT5_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) -F $(QT5_PREFIX)/lib -framework QtCore -framework QtGui -framework QtWidgets
-QT5_STYLES_DIR = $(QT5_PREFIX)/plugins/styles
-endif
-
-ifeq ($(HAVE_QT6),true)
-QT6_CXX_FLAGS  = $(BUILD_CXX_FLAGS) $(shell pkg-config --cflags Qt6Core Qt6Gui Qt6Widgets) -std=gnu++17
-QT6_LINK_FLAGS = $(NON_STATIC_LINK_FLAGS) $(shell pkg-config --libs Qt6Core Qt6Gui Qt6Widgets)
-QT6_STYLES_DIR = $(shell pkg-config --variable=libdir Qt6Core)/qt6/plugins/styles
-endif
-
 # ---------------------------------------------------------------------------------------------------------------------
 
 ifeq ($(HAVE_QT4),true)
@@ -59,70 +25,56 @@ FILES_qt4 = \
 	$(OBJDIR)/moc_CarlaStylePlugin.qt4.cpp \
 	$(OBJDIR)/moc_CarlaStylePrivate.qt4.cpp \
 	$(OBJDIR)/resources.qt4.cpp
-endif
-
-ifeq ($(HAVE_QT5),true)
-FILES_qt5 = \
-	$(OBJDIR)/moc_CarlaStyle.qt5.cpp \
-	$(OBJDIR)/moc_CarlaStyleAnimations.qt5.cpp \
-	$(OBJDIR)/moc_CarlaStylePlugin.qt5.cpp \
-	$(OBJDIR)/moc_CarlaStylePrivate.qt5.cpp \
-	$(OBJDIR)/resources.qt5.cpp
-endif
-
-ifeq ($(HAVE_QT6),true)
-FILES_qt6 = \
-	$(OBJDIR)/moc_CarlaStyle.qt6.cpp \
-	$(OBJDIR)/moc_CarlaStyleAnimations.qt6.cpp \
-	$(OBJDIR)/moc_CarlaStylePlugin.qt6.cpp \
-	$(OBJDIR)/moc_CarlaStylePrivate.qt6.cpp \
-	$(OBJDIR)/resources.qt6.cpp
-endif
 
-# ---------------------------------------------------------------------------------------------------------------------
-
-ifeq ($(HAVE_QT4),true)
 OBJS_qt4 = \
 	$(OBJDIR)/CarlaStyle.cpp.qt4.o \
 	$(OBJDIR)/moc_CarlaStyle.qt4.cpp.o \
 	$(OBJDIR)/moc_CarlaStyleAnimations.qt4.cpp.o \
 	$(OBJDIR)/moc_CarlaStylePrivate.qt4.cpp.o \
 	$(OBJDIR)/resources.qt4.cpp.o
-
-OBJS_qt4_shared = $(OBJS_qt4) \
-	$(OBJDIR)/CarlaStylePlugin.cpp.qt4.o \
-	$(OBJDIR)/moc_CarlaStylePlugin.qt4.cpp.o
 endif
 
 ifeq ($(HAVE_QT5),true)
+FILES_qt5 = \
+	$(OBJDIR)/moc_CarlaStyle.qt5.cpp \
+	$(OBJDIR)/moc_CarlaStyleAnimations.qt5.cpp \
+	$(OBJDIR)/moc_CarlaStylePlugin.qt5.cpp \
+	$(OBJDIR)/moc_CarlaStylePrivate.qt5.cpp \
+	$(OBJDIR)/resources.qt5.cpp
+
 OBJS_qt5 = \
 	$(OBJDIR)/CarlaStyle.cpp.qt5.o \
 	$(OBJDIR)/moc_CarlaStyle.qt5.cpp.o \
 	$(OBJDIR)/moc_CarlaStyleAnimations.qt5.cpp.o \
 	$(OBJDIR)/moc_CarlaStylePrivate.qt5.cpp.o \
 	$(OBJDIR)/resources.qt5.cpp.o
-
-OBJS_qt5_shared = $(OBJS_qt5) \
-	$(OBJDIR)/CarlaStylePlugin.cpp.qt5.o \
-	$(OBJDIR)/moc_CarlaStylePlugin.qt5.cpp.o
 endif
 
 ifeq ($(HAVE_QT6),true)
+FILES_qt6 = \
+	$(OBJDIR)/moc_CarlaStyle.qt6.cpp \
+	$(OBJDIR)/moc_CarlaStyleAnimations.qt6.cpp \
+	$(OBJDIR)/moc_CarlaStylePlugin.qt6.cpp \
+	$(OBJDIR)/moc_CarlaStylePrivate.qt6.cpp \
+	$(OBJDIR)/resources.qt6.cpp
+
 OBJS_qt6 = \
 	$(OBJDIR)/CarlaStyle.cpp.qt6.o \
 	$(OBJDIR)/moc_CarlaStyle.qt6.cpp.o \
 	$(OBJDIR)/moc_CarlaStyleAnimations.qt6.cpp.o \
 	$(OBJDIR)/moc_CarlaStylePrivate.qt6.cpp.o \
 	$(OBJDIR)/resources.qt6.cpp.o
-
-OBJS_qt6_shared = $(OBJS_qt6) \
-	$(OBJDIR)/CarlaStylePlugin.cpp.qt6.o \
-	$(OBJDIR)/moc_CarlaStylePlugin.qt6.cpp.o
 endif
 
 # ---------------------------------------------------------------------------------------------------------------------
 
-ifeq ($(HAVE_QT5),true)
+OBJS_qt_shared = $(OBJS_qt$(FRONTEND_TYPE)) \
+	$(OBJDIR)/CarlaStylePlugin.cpp.qt$(FRONTEND_TYPE).o \
+	$(OBJDIR)/moc_CarlaStylePlugin.qt$(FRONTEND_TYPE).cpp.o
+
+# ---------------------------------------------------------------------------------------------------------------------
+
+ifneq (,$(FRONTEND_TYPE))
 all: $(BINDIR)/styles/carlastyle$(LIB_EXT) $(BINDIR)/styles/carlastyle.json
 else
 all:
@@ -167,20 +119,20 @@ $(MODULEDIR)/$(MODULENAME).qt6.a: $(FILES_qt6) $(OBJS_qt6)
 
 # ---------------------------------------------------------------------------------------------------------------------
 
-$(BINDIR)/styles/carlastyle.dll: $(FILES_qt5) $(OBJS_qt5_shared)
+$(BINDIR)/styles/carlastyle.dll: $(FILES_qt5) $(OBJS_qt_shared)
 	-@mkdir -p $(BINDIR)/styles
 	@echo "Linking carlastyle.dll"
-	$(SILENT)$(CXX) $(OBJS_qt5_shared) $(QT5_LINK_FLAGS) -shared -o $@
+	$(SILENT)$(CXX) $(OBJS_qt_shared) $(NON_STATIC_LINK_FLAGS) $(QT_LINK_FLAGS) -shared -o $@
 
-$(BINDIR)/styles/carlastyle.dylib: $(FILES_qt5) $(OBJS_qt5_shared)
+$(BINDIR)/styles/carlastyle.dylib: $(FILES_qt5) $(OBJS_qt_shared)
 	-@mkdir -p $(BINDIR)/styles
 	@echo "Linking carlastyle.dylib"
-	$(SILENT)$(CXX) $(OBJS_qt5_shared) $(QT5_LINK_FLAGS) -dynamiclib -o $@
+	$(SILENT)$(CXX) $(OBJS_qt_shared) $(NON_STATIC_LINK_FLAGS) $(QT_LINK_FLAGS) -dynamiclib -o $@
 
-$(BINDIR)/styles/carlastyle.so: $(FILES_qt5) $(OBJS_qt5_shared)
+$(BINDIR)/styles/carlastyle.so: $(FILES_qt5) $(OBJS_qt_shared)
 	-@mkdir -p $(BINDIR)/styles
 	@echo "Linking carlastyle.so"
-	$(SILENT)$(CXX) $(OBJS_qt5_shared) $(QT5_LINK_FLAGS) -shared -o $@
+	$(SILENT)$(CXX) $(OBJS_qt_shared) $(NON_STATIC_LINK_FLAGS) $(QT_LINK_FLAGS) -shared -o $@
 
 $(BINDIR)/styles/carlastyle.json: styles/carlastyle.json
 	-@mkdir -p $(BINDIR)/styles
@@ -223,36 +175,38 @@ $(OBJDIR)/resources.qt6.cpp: $(CWD)/../resources/resources-theme.qrc
 $(OBJDIR)/%.qt4.cpp.o: $(OBJDIR)/%.qt4.cpp $(OBJDIR)/moc_CarlaStyle.qt4.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $*.cpp (Qt4)"
-	$(SILENT)$(CXX) $< $(QT4_CXX_FLAGS) -Wno-unused-variable -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT4_CXX_FLAGS) -Wno-unused-variable -c -o $@
 
 $(OBJDIR)/%.qt5.cpp.o: $(OBJDIR)/%.qt5.cpp $(OBJDIR)/moc_CarlaStyle.qt5.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $*.cpp (Qt5)"
-	$(SILENT)$(CXX) $< $(QT5_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT5_CXX_FLAGS) -c -o $@
 
 $(OBJDIR)/%.qt6.cpp.o: $(OBJDIR)/%.qt6.cpp $(OBJDIR)/moc_CarlaStyle.qt6.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $*.cpp (Qt6)"
-	$(SILENT)$(CXX) $< $(QT6_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT6_CXX_FLAGS) -c -o $@
 
 $(OBJDIR)/%.cpp.qt4.o: %.cpp $(OBJDIR)/moc_CarlaStyle.qt4.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (Qt4)"
-	$(SILENT)$(CXX) $< $(QT4_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT4_CXX_FLAGS) -c -o $@
 
 $(OBJDIR)/%.cpp.qt5.o: %.cpp $(OBJDIR)/moc_CarlaStyle.qt5.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (Qt5)"
-	$(SILENT)$(CXX) $< $(QT5_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT5_CXX_FLAGS) -c -o $@
 
 $(OBJDIR)/%.cpp.qt6.o: %.cpp $(OBJDIR)/moc_CarlaStyle.qt6.cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (Qt6)"
-	$(SILENT)$(CXX) $< $(QT6_CXX_FLAGS) -c -o $@
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) $(QT6_CXX_FLAGS) -c -o $@
 
 # ---------------------------------------------------------------------------------------------------------------------
 
--include $(OBJS_qt4_shared:%.o=%.d)
--include $(OBJS_qt5_shared:%.o=%.d)
+-include $(OBJS_qt4:%.o=%.d)
+-include $(OBJS_qt5:%.o=%.d)
+-include $(OBJS_qt6:%.o=%.d)
+-include $(OBJS_qt_shared:%.o=%.d)
 
 # ---------------------------------------------------------------------------------------------------------------------