Index: head/graphics/gmt5/files/patch-src_common__sighandler.c
===================================================================
--- head/graphics/gmt5/files/patch-src_common__sighandler.c	(revision 538426)
+++ head/graphics/gmt5/files/patch-src_common__sighandler.c	(revision 538427)
@@ -1,11 +1,13 @@
 --- src/common_sighandler.c.orig	2019-02-25 06:44:38 UTC
 +++ src/common_sighandler.c
-@@ -69,6 +69,8 @@ void backtrace_symbols_fd(void *const *buffer, int siz
+@@ -69,6 +69,10 @@ void backtrace_symbols_fd(void *const *buffer, int siz
  #  define UC_IP(uc) ((void *) (uc)->uc_mcontext.mc_rip)
  # elif defined( __arm__)
  #  define UC_IP(uc) ((void *) (uc)->uc_mcontext.arm_pc)
 +# elif defined( __ppc__)
 +#  define UC_IP(uc) ((void *) (uc)->uc_mcontext.mc_srr0)
++# elif defined( __aarch64__)
++#  define UC_IP(uc) ((void *) (uc)->uc_mcontext.mc_gpregs.gp_elr)
  # else
  #  define UC_IP(uc) ((void *) (uc)->uc_mcontext.mc_eip)
  # endif