* harbour/common.mak
* harbour/source/compiler/Makefile
* harbour/source/compiler/cmdcheck.c
* harbour/source/compiler/hbmain.c
* harbour/source/compiler/hbusage.c
* disabled support for unfinished -gw compiler switch in
default builds. It can be enabled by developers who will
want to work on this code by recompiling Harbour with
HB_GEN_W32_OBJ macro (f.e. by setting it in C_USR envvar)