@@ -1146,10 +1146,16 @@ check_func_headers(){

         for hdr in $headers; do

             print_include $hdr

         done

+        echo "#include <stdint.h>"

         for func in $funcs; do

             echo "long check_$func(void) { return (long) $func; }"

         done

-        echo "int main(void) { return 0; }"

+        echo "int main(void) { int ret = 0;"

+        # LTO could optimize out the test functions without this

+        for func in $funcs; do

+            echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"

+        done

+        echo "return ret; }"

     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers

 }