This adds -Wshadow=local to configure.
gdb/ChangeLog
2018-10-04  Tom Tromey  <tom@tromey.com>
	* configure: Rebuild.
	* warning.m4 (AM_GDB_WARNINGS): Add -Wshadow=local.
gdb/gdbserver/ChangeLog
2018-10-04  Tom Tromey  <tom@tromey.com>
	* configure: Rebuild.
+2018-10-04  Tom Tromey  <tom@tromey.com>
+
+       * configure: Rebuild.
+       * warning.m4 (AM_GDB_WARNINGS): Add -Wshadow=local.
+
 2018-10-04  Tom Tromey  <tom@tromey.com>
 
        * guile/scm-frame.c (gdbscm_frame_read_var): Remove inner
 
 -Wno-error=deprecated-register \
 -Wsuggest-override \
 -Wimplicit-fallthrough=3 \
--Wduplicated-cond"
+-Wduplicated-cond \
+-Wshadow=local"
 
 case "${host}" in
   *-*-mingw32*)
 
+2018-10-04  Tom Tromey  <tom@tromey.com>
+
+       * configure: Rebuild.
+
 2018-10-04  Tom Tromey  <tom@tromey.com>
 
        * server.c (handle_status): Rename inner "thread".
 
 -Wno-error=deprecated-register \
 -Wsuggest-override \
 -Wimplicit-fallthrough=3 \
--Wduplicated-cond"
+-Wduplicated-cond \
+-Wshadow=local"
 
 case "${host}" in
   *-*-mingw32*)
 
 -Wno-error=deprecated-register \
 -Wsuggest-override \
 -Wimplicit-fallthrough=3 \
--Wduplicated-cond"
+-Wduplicated-cond \
+-Wshadow=local"
 
 case "${host}" in
   *-*-mingw32*)