mingw-cross-env.pri: remove unnecessary options

  - qmake/pkg-config can handle all the config
  - *.dlls are installed in `bin` but gcc links with `*.dll.a` in `lib`
  - `-fpermissive` is not required

Author: tonytheodore

mingw-cross-env.pri

@@ -1,38 +1,8 @@
 # cross compilation unix->win32
 # To use static linking, pass CONFIG+=mingw-cross-env to qmake
 # To use shared linking, pass CONFIG+=mingw-cross-env-shared to qmake
-CONFIG(mingw-cross-env) {
-  LIBS += mingw-cross-env/lib/libglew32s.a 
-  LIBS += mingw-cross-env/lib/libglut.a 
-  LIBS += mingw-cross-env/lib/libopengl32.a 
-  LIBS += mingw-cross-env/lib/libGLEW.a 
-#  exists( mingw-cross-env/lib/libglaux.a ) {
-#    LIBS += mingw-cross-env/lib/libglaux.a
-#  }
-  LIBS += mingw-cross-env/lib/libglu32.a 
-  LIBS += mingw-cross-env/lib/libopencsg.a 
-  LIBS += mingw-cross-env/lib/libmpfr.a 
-  LIBS += mingw-cross-env/lib/libgmp.a 
-  LIBS += mingw-cross-env/lib/libCGAL.a
-  LIBS += mingw-cross-env/lib/libfontconfig.a
-  LIBS += mingw-cross-env/lib/libfreetype.a
-  LIBS += mingw-cross-env/lib/libharfbuzz.a
-  LIBS += mingw-cross-env/lib/libbz2.a
-  LIBS += mingw-cross-env/lib/libexpat.a
-  LIBS += mingw-cross-env/lib/libintl.a
-  LIBS += mingw-cross-env/lib/libiconv.a
-}
-
-CONFIG(mingw-cross-env-shared) {
-  # on MXE, the shared library .dll files are under 'bin' not 'lib'.
-  QMAKE_LFLAGS += -L./mingw-cross-env/bin
-  LIBS += -lglew32 -lglut -lopengl32 -lGLEW -lglu32
-  LIBS += -lopencsg -lmpfr -lgmp -lCGAL 
-  LIBS += -lfontconfig -lfreetype -lharfbuzz -lbz2 -lexpat -lintl -liconv
-}
 
-CONFIG(mingw-cross-env)|CONFIG(mingw-cross-env-shared) {
-  QMAKE_CXXFLAGS += -fpermissive
+mingw-cross-env* {
   QMAKE_DEL_FILE = rm -f
   QMAKE_CXXFLAGS_WARN_ON += -Wno-unused-local-typedefs #eigen3
 }