MinGW: reuse gcc-base.conf and g++-base.conf

it allows using optimize_full, ltcg and sanitizers

Change-Id: I3ccf8257145c7d8800c2ebe98c5ac5adcec0dc9d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

mkspecs/common/gcc-base-mac.conf

@@ -8,6 +8,8 @@
 # you can use the manual test in tests/manual/mkspecs.
 #
 
+QMAKE_CFLAGS_PIC            = -fPIC
+
 include(gcc-base.conf)
 
 QMAKE_COMPILER_DEFINES += __APPLE__ __GNUC__=4 __APPLE_CC__

mkspecs/common/gcc-base-unix.conf

@@ -8,6 +8,8 @@
 # you can use the manual test in tests/manual/mkspecs.
 #
 
+QMAKE_CFLAGS_PIC        = -fPIC
+
 include(gcc-base.conf)
 
 QMAKE_LFLAGS_SHLIB     += -shared

mkspecs/common/gcc-base.conf

@@ -41,9 +41,9 @@ QMAKE_CFLAGS_WARN_OFF      += -w
 QMAKE_CFLAGS_RELEASE       += $$QMAKE_CFLAGS_OPTIMIZE
 QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -g
 QMAKE_CFLAGS_DEBUG         += -g
-QMAKE_CFLAGS_SHLIB         += -fPIC
+QMAKE_CFLAGS_SHLIB         += $$QMAKE_CFLAGS_PIC
-QMAKE_CFLAGS_STATIC_LIB    += -fPIC
+QMAKE_CFLAGS_STATIC_LIB    += $$QMAKE_CFLAGS_PIC
-QMAKE_CFLAGS_APP           += -fPIC
+QMAKE_CFLAGS_APP           += $$QMAKE_CFLAGS_PIC
 QMAKE_CFLAGS_ISYSTEM        = -isystem
 QMAKE_CFLAGS_YACC          += -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_HIDESYMS      += -fvisibility=hidden

mkspecs/features/link_ltcg.prf

@@ -1,5 +1,6 @@
 gcc {
-    !clang:!intel_icc:greaterThan(QMAKE_HOST.cpu_count, 1) {
+    # on Windows, MinGW's support for -flto=N is broken
+    !clang:!intel_icc:!equals(QMAKE_HOST.os, Windows):greaterThan(QMAKE_HOST.cpu_count, 1) {
         # Override LTO number of jobs
         QMAKE_LFLAGS_LTCG ~= s/^-flto$/-flto=$$QMAKE_HOST.cpu_count/
     }

mkspecs/win32-g++/qmake.conf

@@ -8,6 +8,7 @@
 #
 
 load(device_config)
+include(../common/g++-base.conf)
 
 MAKEFILE_GENERATOR      = MINGW
 QMAKE_PLATFORM          = win32 mingw
@@ -18,52 +19,21 @@ QMAKE_COMPILER_DEFINES += __GNUC__ WIN32
 QMAKE_EXT_OBJ           = .o
 QMAKE_EXT_RES           = _res.o
 
-QMAKE_COMPILER          = gcc
 
 QMAKE_CC                = $${CROSS_COMPILE}gcc
 QMAKE_LEX               = flex
 QMAKE_LEXFLAGS          =
 QMAKE_YACC              = bison -y
 QMAKE_YACCFLAGS         = -d
-QMAKE_CFLAGS            = -pipe -fno-keep-inline-dllexport
+QMAKE_CFLAGS           += -fno-keep-inline-dllexport
-QMAKE_CFLAGS_DEPS       = -M
+QMAKE_CFLAGS_WARN_ON   += -Wextra
-QMAKE_CFLAGS_WARN_ON    = -Wall -Wextra
+QMAKE_CFLAGS_SSE2      += -mstackrealign
-QMAKE_CFLAGS_WARN_OFF   = -w
-QMAKE_CFLAGS_RELEASE    = -O2
-QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO = -O2 -g
-QMAKE_CFLAGS_DEBUG      = -g
-QMAKE_CFLAGS_YACC       = -Wno-unused -Wno-parentheses
-QMAKE_CFLAGS_SPLIT_SECTIONS = -ffunction-sections
-QMAKE_CFLAGS_SSE2       = -msse2 -mstackrealign
-QMAKE_CFLAGS_SSE3       = -msse3
-QMAKE_CFLAGS_SSSE3      = -mssse3
-QMAKE_CFLAGS_SSE4_1     = -msse4.1
-QMAKE_CFLAGS_SSE4_2     = -msse4.2
-QMAKE_CFLAGS_AVX        = -mavx
-QMAKE_CFLAGS_AVX2       = -mavx2
-QMAKE_CFLAGS_NEON       = -mfpu=neon
 
 QMAKE_CXX               = $${CROSS_COMPILE}g++
-QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
-QMAKE_CXXFLAGS_DEPS     = $$QMAKE_CFLAGS_DEPS
-QMAKE_CXXFLAGS_WARN_ON  = $$QMAKE_CFLAGS_WARN_ON
-QMAKE_CXXFLAGS_WARN_OFF = $$QMAKE_CFLAGS_WARN_OFF
-QMAKE_CXXFLAGS_RELEASE  = $$QMAKE_CFLAGS_RELEASE
-QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO = $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
-QMAKE_CXXFLAGS_DEBUG    = $$QMAKE_CFLAGS_DEBUG
-QMAKE_CXXFLAGS_YACC     = $$QMAKE_CFLAGS_YACC
 QMAKE_CXXFLAGS_THREAD   = $$QMAKE_CFLAGS_THREAD
 QMAKE_CXXFLAGS_RTTI_ON  = -frtti
 QMAKE_CXXFLAGS_RTTI_OFF = -fno-rtti
 QMAKE_CXXFLAGS_EXCEPTIONS_ON = -fexceptions -mthreads
-QMAKE_CXXFLAGS_EXCEPTIONS_OFF = -fno-exceptions
-QMAKE_CXXFLAGS_CXX11    = -std=c++11
-QMAKE_CXXFLAGS_CXX14    = -std=c++1y
-QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
-QMAKE_CXXFLAGS_GNUCXX11 = -std=gnu++11
-QMAKE_CXXFLAGS_GNUCXX14 = -std=gnu++1y
-QMAKE_CXXFLAGS_GNUCXX1Z = -std=gnu++1z
-QMAKE_CXXFLAGS_SPLIT_SECTIONS = $$QMAKE_CFLAGS_SPLIT_SECTIONS
 
 QMAKE_INCDIR            =
 
@@ -74,17 +44,11 @@ QMAKE_RUN_CXX_IMP       = $(CXX) -c $(CXXFLAGS) $(INCPATH) -o $@ $<
 
 QMAKE_LINK              = $${CROSS_COMPILE}g++
 QMAKE_LINK_C            = $${CROSS_COMPILE}gcc
-QMAKE_LFLAGS            =
 QMAKE_LFLAGS_EXCEPTIONS_ON = -mthreads
-QMAKE_LFLAGS_EXCEPTIONS_OFF =
 QMAKE_LFLAGS_RELEASE    = -Wl,-s
-QMAKE_LFLAGS_DEBUG      =
 QMAKE_LFLAGS_CONSOLE    = -Wl,-subsystem,console
 QMAKE_LFLAGS_WINDOWS    = -Wl,-subsystem,windows
 QMAKE_LFLAGS_DLL        = -shared
-QMAKE_LFLAGS_CXX11      =
-QMAKE_LFLAGS_CXX14      =
-QMAKE_LFLAGS_CXX1Z      =
 QMAKE_LFLAGS_GCSECTIONS = -Wl,--gc-sections
 QMAKE_LINK_OBJECT_MAX   = 10
 QMAKE_LINK_OBJECT_SCRIPT = object_script
@@ -114,5 +78,6 @@ QMAKE_OBJCOPY           = $${CROSS_COMPILE}objcopy
 QMAKE_NM                = $${CROSS_COMPILE}nm -P
 
 include(../common/windows-gles.conf)
+include(../common/gcc-base.conf)
 
 load(qt_config)