* i386/cygwin.h (SUBTARGET_OVERRIDE_OPTIONS): New macro to ignore
	fpic/fPIC for windows32 targets.
	* i386/xm-cygwin.h (GET_ENV_PATH_LIST): Replace '\\' in windows32
	paths with '/'.
	* i386/mingw32.h (CPP_SPEC): Define.
	(CPP_PREDEFINES): Add MINGW32 version id.
	* i386/crtdll.h (CPP_PREDEFINES): Likewise.

From-SVN: r25121