Omniblade from Thyme project [0] managed to get Generals to compile [1][2] but there is still work to be done:
[0] https://github.com/TheAssemblyArmada/Thyme
[1] https://discord.com/channels/409121752921276426/409121752921...
[2] https://github.com/electronicarts/CnC_Generals_Zero_Hour/com...