+if test "x$CLANG_CPLUSPLUS" = "xyes" ; then
+ for cf_clang_opt in \
+ -Qunused-arguments \
+ -Wno-error=implicit-function-declaration
+ do
+ echo "$as_me:16814: checking if option $cf_clang_opt works" >&5
+echo $ECHO_N "checking if option $cf_clang_opt works... $ECHO_C" >&6
+ cat >conftest.$ac_ext <<_ACEOF
+#line 16817 "configure"
+#include "confdefs.h"
+
+ #include <stdio.h>
+int
+main (void)
+{
+
+ printf("hello!\n");
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:16831: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:16834: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (eval echo "$as_me:16837: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:16840: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+
+ cf_clang_optok=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+
+ cf_clang_optok=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+ echo "$as_me:16851: result: $cf_clang_optok" >&5
+echo "${ECHO_T}$cf_clang_optok" >&6
+ if test $cf_clang_optok = yes; then
+ test -n "$verbose" && echo " adding option $cf_clang_opt" 1>&6
+
+echo "${as_me:-configure}:16856: testing adding option $cf_clang_opt ..." 1>&5