Avoid warnings due to the use of -Wuninitialized without -O.

[deliverable/binutils-gdb.git] / gdb / configure

diff --git a/gdb/configure b/gdb/configure
index d77ab938cbb5b763f21e9d7bdc290bcd7971e6a8..d6a9e03450e1e58aef441f0611cf3e020d8716b4 100755 (executable)
--- a/gdb/configure
+++ b/gdb/configure
@@ -19655,8 +19655,21 @@ fi;
 # NOTE: If you add to this list, remember to update
 # gdb/doc/gdbint.texinfo.
 build_warnings="-Wimplicit -Wreturn-type -Wcomment -Wtrigraphs \
--Wformat -Wparentheses -Wpointer-arith -Wuninitialized -Wformat-nonliteral \
+-Wformat -Wparentheses -Wpointer-arith -Wformat-nonliteral \
 -Wunused-label -Wunused-function"
+
+# GCC supports -Wuninitialized only with -O or -On, n != 0.
+if test x${CFLAGS+set} == xset; then
+  case "${CFLAGS}" in
+    *"-O0"* ) ;;
+    *"-O"* )
+      build_warnings="${build_warnings} -Wuninitialized"
+    ;;
+  esac
+else
+  build_warnings="${build_warnings} -Wuninitialized"
+fi
+
 # Up for debate: -Wswitch -Wcomment -trigraphs -Wtrigraphs
 # -Wunused-function -Wunused-variable -Wunused-value
 # -Wchar-subscripts -Wtraditional -Wshadow -Wcast-qual