Log Message:
(1) Recent setup for 7.6 does not support
   bfd_target_elf_flavour
instead only supports
   bfd_target_aout_flavour
   bfd_target_coff_flavour
   bfd_target_ecoff_flavour.
To fix this, we need
  +CONFIGURE_ENV+=                gdb_cv_var_elf=yes
as found in native gdb setup (pkgsrc Makefile).

(2) Utilize curses instead of terminfo,
  +CONFIGURE_ARGS+=       --with-curses

  +# to link -lcurses.7 => /usr/lib/libcurses.so.7
  +# instead of terminfo
  +.include "../../mk/curses.buildlink3.mk"