unifdef -UUSG
USG was defined for a handful of pre-SVR4 systems based on AT&T's Unix System Group releases in the old imake configs and has never been defined in X11R7 modular builds.
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USG was defined for a handful of pre-SVR4 systems based on AT&T's Unix System Group releases in the old imake configs and has never been defined in X11R7 modular builds.