Microsoft took 30 years to implement a C89 compatible preprocessor: https://docs.microsoft.com/en-us/cpp/preprocessor/preprocessor-experimental-overview?view=ms

Microsoft took 30 years to implement a C89 compatible preprocessor: https://docs.microsoft.com/en-us/cpp/preprocessor/preprocessor-experimental-overview?view=msvc-170 https://docs.microsoft.com/en-us/cpp/preprocessor/preprocess...