+
+if test "$cf_cv_gnu_source" = yes
+then
+echo "$as_me:8032: checking if we should also define _DEFAULT_SOURCE" >&5
+echo $ECHO_N "checking if we should also define _DEFAULT_SOURCE... $ECHO_C" >&6
+if test "${cf_cv_default_source+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+ cat >conftest.$ac_ext <<_ACEOF
+#line 8040 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main ()
+{
+
+#ifdef _DEFAULT_SOURCE
+make an error
+#endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:8055: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:8058: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:8061: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:8064: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ cf_cv_default_source=no
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_cv_default_source=yes
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+
+fi
+echo "$as_me:8075: result: $cf_cv_default_source" >&5
+echo "${ECHO_T}$cf_cv_default_source" >&6
+test "$cf_cv_default_source" = yes && CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE"
+fi