diff --git a/components/esp_rom/host_test/rom_test/sdkconfig.defaults b/components/esp_rom/host_test/rom_test/sdkconfig.defaults
index 89c65632c9..823e419d0c 100644
--- a/components/esp_rom/host_test/rom_test/sdkconfig.defaults
+++ b/components/esp_rom/host_test/rom_test/sdkconfig.defaults
@@ -1,3 +1,4 @@
 CONFIG_IDF_TARGET="linux"
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
 CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=n
+CONFIG_COMPILER_WARN_WRITE_STRINGS=y
diff --git a/components/esp_rom/linux/esp_rom_sys.c b/components/esp_rom/linux/esp_rom_sys.c
index 026e195cfe..515e67209e 100644
--- a/components/esp_rom/linux/esp_rom_sys.c
+++ b/components/esp_rom/linux/esp_rom_sys.c
@@ -1,16 +1,8 @@
-// Copyright 2021 Espressif Systems (Shanghai) CO LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -30,7 +22,7 @@ static void call_linux_putc(char c) {
 
 #define is_digit(c) ((c >= '0') && (c <= '9'))
 
-static int _cvt(unsigned long long val, char *buf, long radix, char *digits)
+static int _cvt(unsigned long long val, char *buf, long radix, const char *digits)
 {
 #ifdef SUPPORT_LITTLE_RADIX
     char temp[64];
@@ -65,7 +57,8 @@ static int esp_rom_vprintf(void (*putc)(char c), const char *fmt, va_list ap)
 #else
     char buf[32];
 #endif
-    char c, sign, *cp=buf;
+    char c, sign;
+    const char *cp = buf;
     int left_prec, right_prec, zero_fill, pad, pad_on_right,
         islong, islonglong;
     long long val = 0;
diff --git a/components/log/host_test/log_test/sdkconfig.defaults b/components/log/host_test/log_test/sdkconfig.defaults
index a35fc5148f..3a1006ce0f 100644
--- a/components/log/host_test/log_test/sdkconfig.defaults
+++ b/components/log/host_test/log_test/sdkconfig.defaults
@@ -1,5 +1,6 @@
 CONFIG_IDF_TARGET="linux"
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
+CONFIG_COMPILER_WARN_WRITE_STRINGS=y
 CONFIG_LOG_TIMESTAMP_SOURCE_RTOS=y
 CONFIG_LOG_DEFAULT_LEVEL_VERBOSE=y
 CONFIG_LOG_DEFAULT_LEVEL=5
diff --git a/tools/ci/check_copyright_ignore.txt b/tools/ci/check_copyright_ignore.txt
index ca2c0e4385..eceda4bfaa 100644
--- a/tools/ci/check_copyright_ignore.txt
+++ b/tools/ci/check_copyright_ignore.txt
@@ -588,7 +588,6 @@ components/esp_rom/include/esp_rom_uart.h
 components/esp_rom/include/linux/soc/reset_reasons.h
 components/esp_rom/linux/esp_rom_crc.c
 components/esp_rom/linux/esp_rom_md5.c
-components/esp_rom/linux/esp_rom_sys.c
 components/esp_rom/patches/esp_rom_crc.c
 components/esp_rom/patches/esp_rom_tjpgd.c
 components/esp_rom/test/test_libgcc.c