fix

testlib.h

@@ -6225,20 +6225,10 @@ std::string testlib_format_(const std::string fmt, ...) {
     return result;
 }
 
-#if __cplusplus >= 202002L && __has_include(<format>)
+#if (__cplusplus >= 202002L && __has_include(<format>)) || __cpp_lib_format
 #   include <format>
-#else
-#   ifndef __cpp_lib_format
-    std::string format(const char *fmt, ...) {
-        FMT_TO_RESULT(fmt, fmt, result);
-        return result;
-    }
-
-    std::string format(const std::string fmt, ...) {
-        FMT_TO_RESULT(fmt, fmt.c_str(), result);
-        return result;
-    }
-#endif
 #endif
 
+#define format testlib_format_
+
 #endif

tests/scripts/compile

@@ -35,7 +35,15 @@ rm -f "$exe_file"
 EXTRA_ARGS=""
 
 if [[ -z "${TESTLIB_COMPILER_OPTIMIZATION_OPT}" ]]; then
-    OPTIMIZATION="2"
+    if [[ "$2" == "--check-only" ]]; then
+        if [[ "$CPP" == "cl.exe" ]]; then
+            OPTIMIZATION="d"
+        else    
+            OPTIMIZATION="0"
+        fi
+    else
+        OPTIMIZATION="2"
+    fi
 else
     OPTIMIZATION="${TESTLIB_COMPILER_OPTIMIZATION_OPT}"
 fi