I just got word that Pike 7.6.112 fails to build with the Mach development library version 1.3.99 installed. This is because src/threads.c refers to task_thread_times_info_data_t if defined(HAVE_MACH_TASK_INFO_H), but <mach/task_info.h> doesn't #include <mach/message.h> containing the definition.

Questions are implicit.