[嵌入式]log4c 日志时间与系统时间不符

解决log4c 日志时间与系统时间不符

问题：
在项目中，通过ubuntu交叉编译log4c在ARM上运行时，发现生成的日志文件中log的打印时间与系统时间并不相符，因为时区的原因慢了8个小时。

解决方案：
将log4crc文件中的dated更改为dated_local:

[root@Matrix_061001 dc]#cat log4crc 
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE log4c SYSTEM "">
<log4c version="1.2.4">
 
<config>
    <bufsize>0</bufsize>
    <debug level="2"/>
    <nocleanup>0</nocleanup>
    <reread>1</reread>
</config>
 
<!-- root category -->
<category name="root" priority="notice"/>
<category name="mycat" priority="debug" appender="stdout"/>
<category name="file" priority="debug" appender="e2g2231_b01"/>
 
<!-- default appenders -->
<appender name="stdout" type="stream" layout="basic"/>
<!--logdir 日志输出路径    prefix  文件名     layout 输出格式 （与下方layout对应）-->
<appender name="e2g2231_b01" type="rollingfile" logdir="/home/guest/e2g2231/log" layout="dated_local" rollingpolicy="RollingPolicy"/>
<appender name="stderr" type="stream" layout="dated_local"/>
<appender name="syslog" type="syslog" layout="basic"/>
 
<!-- default layouts -->
<layout name="basic" type="basic"/>
<layout name="dated_local" type="dated_local"/>
 
<!--sizewin表示达到最大值后新建日志文件  值由maxsize设定，单位Bytes     maxnum为最大文件数目 maxsize=5mb -->
<!--<rollingpolicy name="RollingPolicy" type="sizewin" maxsize="104857600" maxnum="32767" /> -->
<rollingpolicy name="RollingPolicy" type="sizewin" maxsize="10485760" maxnum="5" />
</log4c>

运行结果：

20210715 10:47:09.830 ERROR    file- [file:main.c, line:67, function:main]log:5001

20210715 10:47:09.851 ERROR    file- [file:main.c, line:67, function:main]log:5012

20210715 10:47:09.872 ERROR    file- [file:main.c, line:67, function:main]log:5022

20210715 10:47:09.893 ERROR    file- [file:main.c, line:67, function:main]log:5033

20210715 10:47:09.914 ERROR    file- [file:main.c, line:67, function:main]log:5043

20210715 10:47:09.935 ERROR    file- [file:main.c, line:67, function:main]log:5054

20210715 10:47:09.956 ERROR    file- [file:main.c, line:67, function:main]log:5064

20210715 10:47:09.977 ERROR    file- [file:main.c, line:67, function:main]log:5075

20210715 10:47:09.998 ERROR    file- [file:main.c, line:67, function:main]log:5085

20210715 10:47:10.019 ERROR    file- [file:main.c, line:67, function:main]log:5095

[root@Matrix_061001 log]#date
Thu Jul 15 10:47:12 CST 2021
[root@Matrix_061001 log]#
[root@Matrix_061001 log]#
[root@Matrix_061001 log]#
[root@Matrix_061001 log]#