--- gdb/configure.orig 2017-09-14 09:28:17 UTC
+++ gdb/configure
@@ -15292,13 +15292,10 @@ if test "${ERROR_ON_WARNING}" = yes ; then
     WERROR_CFLAGS="-Werror"
 fi
 
-# The options we'll try to enable.
+# These options work in either C or C++ modes.
 build_warnings="-Wall -Wpointer-arith \
--Wno-unused -Wunused-value -Wunused-function \
--Wno-switch -Wno-char-subscripts \
--Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable \
--Wno-sign-compare -Wno-narrowing -Wno-error=maybe-uninitialized \
--Wno-mismatched-tags"
+-Wno-unused -Wno-switch -Wno-char-subscripts \
+-Wempty-body -Wno-sign-compare -Wno-narrowing -Wno-mismatched-tags"
 
 case "${host}" in
   *-*-mingw32*)
