https://simson.net/clips/1990/1990.Computerworld.GNU-Software.Aug-6..pdf https://simson.net/clips/1990/1990.Computerworld.GNU-Softwar... This 1990 Computerworl

https://simson.net/clips/1990/1990.Computerworld.GNU-Software.Aug-6..pdf https://simson.net/clips/1990/1990.Computerworld.GNU-Softwar... This 1990 Computerworld article mentions that Lotus compiled all their Unix applications with gcc. Given the timeframe involved, this likely means early gcc 1.x and supporting tools