[PATCH 3/N] some minor fixes in sim, gold, gdb

[Tom Tromey]

>>>>> "Ralf" == Ralf Wildenhues <Ralf.Wildenhues@gmx.de> writes:

Ralf> - gdb: replace obsolete macros with AC_USE_SYSTEM_EXTENSIONS.
Ralf>   This change needs to come at the same time as the Autoconf update,
Ralf>   as it assumes newer Autoconf semantics to properly replace the
Ralf>   other macros.

This part is ok.  Thanks for taking on this project.

Tom