+check_func "setresuid" "$src"
+have_setresuid=$?
+
+#
+# Check for setresgid().
+#
+src='
+#include <unistd.h>
+int main(void) {
+ setresgid(0, 0, 0);
+ return 0;
+}'
+check_func "setresgid" "$src"
+have_setresgid=$?
+
+if [ $have_setresuid -eq 1 -o $have_setresgid -eq 1 ]; then