Welcome Igor Todorovski as #curl committer 1152: github.com/curl/curl/pull/1124…
system.h: Remove __IBMC__/__IBMCPP__ guards and apply to all z/OS (__MVS__) compiles by IgorTodorovskiIBM · Pull Request #11241 · curl/curl
z/OS now supports Clang where __IBMC__/__IBMCPP__ macros are not set, yet the same system.h macro values apply.GitHub