system/grep: (ppc) error: 'mcontext_t' {aka 'struct <anonymous>'} has no member named 'uc_regs'

...
  CC       pipe-safer.o
sigsegv.c: In function 'sigsegv_handler':
sigsegv.c:225:75: error: 'mcontext_t' {aka 'struct <anonymous>'} has no member named 'uc_regs'; did you mean 'gregs'?
 #    define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.uc_regs->gregs[1]
                                                                           ^~~~~~~
sigsegv.c:940:43: note: in expansion of macro 'SIGSEGV_FAULT_STACKPOINTER'
           uintptr_t old_sp = (uintptr_t) (SIGSEGV_FAULT_STACKPOINTER);
                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~
make[3]: *** [Makefile:2328: sigsegv.o] Error 1
make[3]: *** Waiting for unfinished jobs....

20220507-06_41_53.151973677_grep.log

Edited May 07, 2022 by Zach van Rijn