diff --git a/mkspecs/common/g++-win32.conf b/mkspecs/common/g++-win32.conf
new file mode 100644
index 00000000000..610503379d6
--- /dev/null
+++ b/mkspecs/common/g++-win32.conf
@@ -0,0 +1,82 @@
+#
+# This file is used as a basis for the following compilers, when targeting
+# MinGW-w64:
+#
+# - GCC
+# - Clang
+#
+# Compiler-specific settings go into win32-g++/qmake.conf and
+# win32-clang-g++/qmake.conf
+#
+
+load(device_config)
+include(gcc-base.conf)
+include(g++-base.conf)
+
+# modifications to gcc-base.conf and g++-base.conf
+
+MAKEFILE_GENERATOR      = MINGW
+QMAKE_PLATFORM          = win32 mingw
+CONFIG                 += debug_and_release debug_and_release_target precompile_header
+DEFINES                += UNICODE _UNICODE WIN32
+QMAKE_COMPILER_DEFINES += __GNUC__ _WIN32
+# can't add 'DEFINES += WIN64' and 'QMAKE_COMPILER_DEFINES += _WIN64' defines for
+# x86_64 platform similar to 'msvc-desktop.conf' toolchain, because, unlike for MSVC,
+# 'QMAKE_TARGET.arch' is inherently unavailable.
+
+QMAKE_LEX               = flex
+QMAKE_LEXFLAGS          =
+QMAKE_YACC              = bison -y
+QMAKE_YACCFLAGS         = -d
+
+QMAKE_CFLAGS_SSE2      += -mstackrealign
+
+QMAKE_CXXFLAGS_RTTI_ON  = -frtti
+QMAKE_CXXFLAGS_RTTI_OFF = -fno-rtti
+QMAKE_CXXFLAGS_EXCEPTIONS_ON = -fexceptions -mthreads
+
+QMAKE_INCDIR            =
+
+QMAKE_RUN_CC            = $(CC) -c $(CFLAGS) $(INCPATH) -o $obj $src
+QMAKE_RUN_CC_IMP        = $(CC) -c $(CFLAGS) $(INCPATH) -o $@ $<
+QMAKE_RUN_CXX           = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $obj $src
+QMAKE_RUN_CXX_IMP       = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $@ $<
+
+QMAKE_LFLAGS_EXCEPTIONS_ON = -mthreads
+QMAKE_LFLAGS_RELEASE    = -Wl,-s
+QMAKE_LFLAGS_CONSOLE    = -Wl,-subsystem,console
+QMAKE_LFLAGS_WINDOWS    = -Wl,-subsystem,windows
+QMAKE_LFLAGS_DLL        = -shared
+QMAKE_LFLAGS_GCSECTIONS = -Wl,--gc-sections
+equals(QMAKE_HOST.os, Windows) {
+    QMAKE_LINK_OBJECT_MAX = 10
+    QMAKE_LINK_OBJECT_SCRIPT = object_script
+}
+QMAKE_EXT_OBJ           = .o
+QMAKE_EXT_RES           = _res.o
+QMAKE_PREFIX_SHLIB      =
+QMAKE_EXTENSION_SHLIB   = dll
+QMAKE_PREFIX_STATICLIB  = lib
+QMAKE_EXTENSION_STATICLIB = a
+QMAKE_LIB_EXTENSIONS    = a dll.a
+
+QMAKE_LIBS              =
+QMAKE_LIBS_GUI          = -lgdi32 -lcomdlg32 -loleaut32 -limm32 -lwinmm -lws2_32 -lole32 -luuid -luser32 -ladvapi32
+QMAKE_LIBS_NETWORK      = -lws2_32
+QMAKE_LIBS_OPENGL       = -lglu32 -lopengl32 -lgdi32 -luser32
+QMAKE_LIBS_OPENGL_ES2   = -lgdi32 -luser32
+QMAKE_LIBS_OPENGL_ES2_DEBUG = -lgdi32 -luser32
+QMAKE_LIBS_COMPAT       = -ladvapi32 -lshell32 -lcomdlg32 -luser32 -lgdi32 -lws2_32
+QMAKE_LIBS_QT_ENTRY     = -lmingw32 -lqtmain
+
+QMAKE_IDL               = midl
+QMAKE_LIB               = $${CROSS_COMPILE}ar -rc
+QMAKE_RC                = $${CROSS_COMPILE}windres
+
+QMAKE_STRIP             = $${CROSS_COMPILE}strip
+QMAKE_STRIPFLAGS_LIB   += --strip-unneeded
+QMAKE_OBJCOPY           = $${CROSS_COMPILE}objcopy
+QMAKE_NM                = $${CROSS_COMPILE}nm -P
+
+include(angle.conf)
+include(windows-vulkan.conf)
diff --git a/mkspecs/win32-clang-g++/qmake.conf b/mkspecs/win32-clang-g++/qmake.conf
index 1cae64ce993..4630ec46029 100644
--- a/mkspecs/win32-clang-g++/qmake.conf
+++ b/mkspecs/win32-clang-g++/qmake.conf
@@ -7,84 +7,21 @@
 #   configure -xplatform win32-clang-g++ -device-option CROSS_COMPILE=x86_64-w64-mingw32-
 #
 
-load(device_config)
-include(../common/gcc-base.conf)
-include(../common/g++-base.conf)
-include(../common/angle.conf)
-include(../common/windows-vulkan.conf)
+include(../common/g++-win32.conf)
 
-# modifications to gcc-base.conf and g++-base.conf
+# modifications to g++-win32.conf
 
-MAKEFILE_GENERATOR      = MINGW
-QMAKE_PLATFORM          = win32 mingw
-CONFIG                 += debug_and_release debug_and_release_target precompile_header
-DEFINES                += UNICODE _UNICODE WIN32
-QMAKE_COMPILER          = gcc clang llvm   # clang pretends to be gcc
-QMAKE_COMPILER_DEFINES += __GNUC__ _WIN32
-# can't add 'DEFINES += WIN64' and 'QMAKE_COMPILER_DEFINES += _WIN64' defines for
-# x86_64 platform similar to 'msvc-desktop.conf' toolchain, because, unlike for MSVC,
-# 'QMAKE_TARGET.arch' is inherently unavailable.
+QMAKE_COMPILER         += clang llvm   # clang pretends to be gcc
 
 QMAKE_CC                = $${CROSS_COMPILE}clang
-QMAKE_LEX               = flex
-QMAKE_LEXFLAGS          =
-QMAKE_YACC              = bison -y
-QMAKE_YACCFLAGS         = -d
 QMAKE_CFLAGS           +=
 QMAKE_CFLAGS_WARN_ON   += -Wextra -Wno-ignored-attributes
 
-QMAKE_CFLAGS_SSE2      += -mstackrealign
-
 QMAKE_CXX               = $${CROSS_COMPILE}clang++
-QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS         +=
 QMAKE_CXXFLAGS_WARN_ON  = $$QMAKE_CFLAGS_WARN_ON
-QMAKE_CXXFLAGS_RTTI_ON  = -frtti
-QMAKE_CXXFLAGS_RTTI_OFF = -fno-rtti
-QMAKE_CXXFLAGS_EXCEPTIONS_ON = -fexceptions -mthreads
-
-QMAKE_INCDIR            =
-
-QMAKE_RUN_CC            = $(CC) -c $(CFLAGS) $(INCPATH) -o $obj $src
-QMAKE_RUN_CC_IMP        = $(CC) -c $(CFLAGS) $(INCPATH) -o $@ $<
-QMAKE_RUN_CXX           = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $obj $src
-QMAKE_RUN_CXX_IMP       = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $@ $<
 
 QMAKE_LINK              = $${CROSS_COMPILE}clang++
 QMAKE_LINK_C            = $${CROSS_COMPILE}clang
-QMAKE_LFLAGS_EXCEPTIONS_ON = -mthreads
-QMAKE_LFLAGS_RELEASE    = -Wl,-s
-QMAKE_LFLAGS_CONSOLE    = -Wl,-subsystem,console
-QMAKE_LFLAGS_WINDOWS    = -Wl,-subsystem,windows
-QMAKE_LFLAGS_DLL        = -shared
-QMAKE_LFLAGS_GCSECTIONS = -Wl,--gc-sections
-equals(QMAKE_HOST.os, Windows) {
-    QMAKE_LINK_OBJECT_MAX = 10
-    QMAKE_LINK_OBJECT_SCRIPT = object_script
-}
-QMAKE_EXT_OBJ           = .o
-QMAKE_EXT_RES           = _res.o
-QMAKE_PREFIX_SHLIB      =
-QMAKE_EXTENSION_SHLIB   = dll
-QMAKE_PREFIX_STATICLIB  = lib
-QMAKE_EXTENSION_STATICLIB = a
-QMAKE_LIB_EXTENSIONS    = a dll.a
-
-QMAKE_LIBS              =
-QMAKE_LIBS_GUI          = -lgdi32 -lcomdlg32 -loleaut32 -limm32 -lwinmm -lws2_32 -lole32 -luuid -luser32 -ladvapi32
-QMAKE_LIBS_NETWORK      = -lws2_32
-QMAKE_LIBS_OPENGL       = -lglu32 -lopengl32 -lgdi32 -luser32
-QMAKE_LIBS_OPENGL_ES2   = -lgdi32 -luser32
-QMAKE_LIBS_OPENGL_ES2_DEBUG = -lgdi32 -luser32
-QMAKE_LIBS_COMPAT       = -ladvapi32 -lshell32 -lcomdlg32 -luser32 -lgdi32 -lws2_32
-QMAKE_LIBS_QT_ENTRY     = -lmingw32 -lqtmain
-
-QMAKE_IDL               = midl
-QMAKE_LIB               = $${CROSS_COMPILE}ar -rc
-QMAKE_RC                = $${CROSS_COMPILE}windres
-
-QMAKE_STRIP             = $${CROSS_COMPILE}strip
-QMAKE_STRIPFLAGS_LIB   += --strip-unneeded
-QMAKE_OBJCOPY           = $${CROSS_COMPILE}objcopy
-QMAKE_NM                = $${CROSS_COMPILE}nm -P
 
 load(qt_config)
diff --git a/mkspecs/win32-g++/qmake.conf b/mkspecs/win32-g++/qmake.conf
index 9f366e08b86..9c289a05f9f 100644
--- a/mkspecs/win32-g++/qmake.conf
+++ b/mkspecs/win32-g++/qmake.conf
@@ -7,83 +7,19 @@
 #   configure -xplatform win32-g++ -device-option CROSS_COMPILE=i686-w64-mingw32-
 #
 
-load(device_config)
-include(../common/gcc-base.conf)
-include(../common/g++-base.conf)
-include(../common/angle.conf)
-include(../common/windows-vulkan.conf)
+include(../common/g++-win32.conf)
 
-# modifications to gcc-base.conf and g++-base.conf
-
-MAKEFILE_GENERATOR      = MINGW
-QMAKE_PLATFORM          = win32 mingw
-CONFIG                 += debug_and_release debug_and_release_target precompile_header
-DEFINES                += UNICODE _UNICODE WIN32
-QMAKE_COMPILER_DEFINES += __GNUC__ _WIN32
-# can't add 'DEFINES += WIN64' and 'QMAKE_COMPILER_DEFINES += _WIN64' defines for
-# x86_64 platform similar to 'msvc-desktop.conf' toolchain, because, unlike for MSVC,
-# 'QMAKE_TARGET.arch' is inherently unavailable.
+# modifications to g++-win32.conf
 
 QMAKE_CC                = $${CROSS_COMPILE}gcc
-QMAKE_LEX               = flex
-QMAKE_LEXFLAGS          =
-QMAKE_YACC              = bison -y
-QMAKE_YACCFLAGS         = -d
 QMAKE_CFLAGS           += -fno-keep-inline-dllexport
 QMAKE_CFLAGS_WARN_ON   += -Wextra
 
-QMAKE_CFLAGS_SSE2      += -mstackrealign
-
 QMAKE_CXX               = $${CROSS_COMPILE}g++
 QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
 QMAKE_CXXFLAGS_WARN_ON  = $$QMAKE_CFLAGS_WARN_ON
-QMAKE_CXXFLAGS_RTTI_ON  = -frtti
-QMAKE_CXXFLAGS_RTTI_OFF = -fno-rtti
-QMAKE_CXXFLAGS_EXCEPTIONS_ON = -fexceptions -mthreads
-
-QMAKE_INCDIR            =
-
-QMAKE_RUN_CC            = $(CC) -c $(CFLAGS) $(INCPATH) -o $obj $src
-QMAKE_RUN_CC_IMP        = $(CC) -c $(CFLAGS) $(INCPATH) -o $@ $<
-QMAKE_RUN_CXX           = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $obj $src
-QMAKE_RUN_CXX_IMP       = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $@ $<
 
 QMAKE_LINK              = $${CROSS_COMPILE}g++
 QMAKE_LINK_C            = $${CROSS_COMPILE}gcc
-QMAKE_LFLAGS_EXCEPTIONS_ON = -mthreads
-QMAKE_LFLAGS_RELEASE    = -Wl,-s
-QMAKE_LFLAGS_CONSOLE    = -Wl,-subsystem,console
-QMAKE_LFLAGS_WINDOWS    = -Wl,-subsystem,windows
-QMAKE_LFLAGS_DLL        = -shared
-QMAKE_LFLAGS_GCSECTIONS = -Wl,--gc-sections
-equals(QMAKE_HOST.os, Windows) {
-    QMAKE_LINK_OBJECT_MAX = 10
-    QMAKE_LINK_OBJECT_SCRIPT = object_script
-}
-QMAKE_EXT_OBJ           = .o
-QMAKE_EXT_RES           = _res.o
-QMAKE_PREFIX_SHLIB      =
-QMAKE_EXTENSION_SHLIB   = dll
-QMAKE_PREFIX_STATICLIB  = lib
-QMAKE_EXTENSION_STATICLIB = a
-QMAKE_LIB_EXTENSIONS    = a dll.a
-
-QMAKE_LIBS              =
-QMAKE_LIBS_GUI          = -lgdi32 -lcomdlg32 -loleaut32 -limm32 -lwinmm -lws2_32 -lole32 -luuid -luser32 -ladvapi32
-QMAKE_LIBS_NETWORK      = -lws2_32
-QMAKE_LIBS_OPENGL       = -lglu32 -lopengl32 -lgdi32 -luser32
-QMAKE_LIBS_OPENGL_ES2   = -lgdi32 -luser32
-QMAKE_LIBS_OPENGL_ES2_DEBUG = -lgdi32 -luser32
-QMAKE_LIBS_COMPAT       = -ladvapi32 -lshell32 -lcomdlg32 -luser32 -lgdi32 -lws2_32
-QMAKE_LIBS_QT_ENTRY     = -lmingw32 -lqtmain
-
-QMAKE_IDL               = midl
-QMAKE_LIB               = $${CROSS_COMPILE}ar -rc
-QMAKE_RC                = $${CROSS_COMPILE}windres
-
-QMAKE_STRIP             = $${CROSS_COMPILE}strip
-QMAKE_STRIPFLAGS_LIB   += --strip-unneeded
-QMAKE_OBJCOPY           = $${CROSS_COMPILE}objcopy
-QMAKE_NM                = $${CROSS_COMPILE}nm -P
 
 load(qt_config)