configure: Enable the -Wwrite-strings flag.
diff --git a/configure b/configure
index 7356552..38320e1 100755
--- a/configure
+++ b/configure
@@ -14690,6 +14690,81 @@
EXTRACFLAGS="$EXTRACFLAGS -Wdeclaration-after-statement"
fi
+ { echo "$as_me:$LINENO: checking for gcc -Wwrite-strings support" >&5
+echo $ECHO_N "checking for gcc -Wwrite-strings support... $ECHO_C" >&6; }
+if test "${ac_cv_c_gcc_write_strings+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -Wwrite-strings"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_link") 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
+ { (case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_c_gcc_write_strings="yes"
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_cv_c_gcc_write_strings="no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_c_gcc_write_strings" >&5
+echo "${ECHO_T}$ac_cv_c_gcc_write_strings" >&6; }
+ if test "$ac_cv_c_gcc_write_strings" = "yes"
+ then
+ EXTRACFLAGS="$EXTRACFLAGS -Wwrite-strings"
+ fi
+
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wpointer-arith -Werror"
{ echo "$as_me:$LINENO: checking for broken string.h that generates warnings" >&5
