gdb: Disable on-target GDB for microblaze

Failure:
../../gdb-10.2/bfd/cpu-microblaze.c:75:1: warning: missing initializer for field 'max_reloc_offset_into_insn' of 'bfd_arch_info_type' {aka 'const struct bfd_arch_info'} [-Wmissing-field-initializers]
|    75 | },
|       | ^
| In file included from ../../gdb-10.2/bfd/cpu-microblaze.c:23:
| ./bfd.h:1998:14: note: 'max_reloc_offset_into_insn' declared here
|  1998 |   signed int max_reloc_offset_into_insn;
|       |              ^~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Mark Hatle <mark.hatle@xilinx.com>
(cherry picked from commit bc23fe5c5b810a7821f0de76d71b6093a05fa509)
Signed-off-by: Mark Hatle <mark.hatle@xilinx.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/meta-microblaze/recipes-devtools/gdb/gdb_%.bbappend b/meta-microblaze/recipes-devtools/gdb/gdb_%.bbappend
index 33fbe158..23866471 100644
--- a/meta-microblaze/recipes-devtools/gdb/gdb_%.bbappend
+++ b/meta-microblaze/recipes-devtools/gdb/gdb_%.bbappend
@@ -1,4 +1,11 @@
 MICROBLAZEPATCHES = ""
 MICROBLAZEPATCHES:microblaze = "gdb-microblaze.inc"
 
+# We don't have ptrace support for on-target microblaze GDB currently.  Need
+# to use tcf-agent or other external debug interface.
+MB_DOES_NOT_WORK = ""
+MB_DOES_NOT_WORK:microblaze = "GDB is not currently supported on Microblaze."
+
+PNBLACKLIST[gdb] = "${MB_DOES_NOT_WORK}"
+
 require ${MICROBLAZEPATCHES}