Add Glog log under Arm-linux system

I. Introduction of Glog
Glog is a lightweight C + + log library developed by Google that is simple to use and lightweight in the program.
The following features are primarily supported:
1 parameter setting to control logging behavior by setting flag parameters;
2 severity rating, logging based on log severity rating;
3 log information can be recorded conditionally;
4 Conditional Abort program, rich conditions to determine the macro, can be preset program termination conditions;
5 abnormal signal processing. Program abnormal situation, can customize the exception processing process;
6 Support Debug function, can only be used in debug mode;
7 custom log information;
8 thread safety logging mode;
9 system level log records;
Google perror style log information;
11 Thin Log string information.

Here's a record of how glog is used in a working project.

Second, compiling Glog
First download the Glog file: glog-0.3.3.tar.gz, unzip it tar-zxvf glog-0.3.3.tar.gz. Enter its directory to execute the following command:

$ ./configure --host=arm-arago-linux-gnueabi

The –host=arm-arago-linux-gnueabi here indicates the development of the platform, if not run on the corresponding arm, directly run "./configure" can.
Generate makefile, load execute make command. There will be a dynamic library libglog.so.0 of. So in the Glog current directory. Copy it to the target machine's/usr/lib directory.
Note: The compiler and runtime are not the same, the runtime is in the/usr/lib, when the compiler applied to the Glog program will also need to add libglog.so.0 in the compilation library. The path to the compiled library here is:/ti-sdk-am335x/linux-devkit/arm-arago-linux-gnueabi/usr/lib. Otherwise, it is not possible to compile the library when it is compiled, but cannot find the library.
In makefile, you need to add a link to the Glog keyword:-lglog.

@$$GG -fstack-check -fbounds-check -fstack-protector-all -g -o $(application_name) $(TOPOBJS) -lm -lpthread -lxml2 -lrt -lglog

Third, practical application
The above steps are completed before they can be used in the program.
Take a look at some of the initialization operations on Glog.

voidInt_glog (void){Chardefpath[ -] = {0};Charstr[ the] ="MkDir";//Get current path    intCNT = Readlink ("/proc/self/exe", Defpath,sizeof(Defpath));//delete the exe name     for(inti = CNT; I >=0; -I.) {if(Defpath[i] = ='/') {defpath[i+1] =' + '; Break; }    }//Create log folderstrcat(Defpath,"Usr/log");if(Access (Defpath, FILE_F_OK)! =0){strcat(Str,defpath);    System (STR); Usleep100000);}//log InitializationGoogle::initgooglelogging ("New"); Flags_colorlogtostderr =true;//Set the output to screen log to show the corresponding color    //flags_servitysinglelog = true;//used to differentiate log files by rankFlags_logbufsecs =0;//buffered log output, default is 30 seconds, here to output immediatelyFlags_max_log_size =1;//maximum log size is 100MBFlags_stop_logging_if_full_disk =true;//Stop log output when the disk is fully writtenGoogle::setstderrlogging (Google::glog_info);//Set the log at a level higher than google::info output to the screen at the same time    //Log name and output address    Charinfo[ -] = {0};Charwarn[ -] = {0};Charerror[ -] = {0};Charfatal[ -] = {0};strcpy(Info, Defpath);strcpy(Warn, Defpath);strcpy(Error, Defpath);strcpy(Fatal, Defpath);strcat(Info,"/info_");strcat(Warn,"/warning_");strcat(Error,"/error_");strcat(Fatal,"/fatal_");     Google::setlogdestination (Google::glog_info,info);     Google::setlogdestination (Google::glog_warning,warn);     Google::setlogdestination (Google::glog_error,error);     Google::setlogdestination (google::glog_fatal,fatal); LOG (INFO) <<"------------------------------"<<endl; LOG (INFO) <<"---------creat Log!!! ---------\ n "; LOG (INFO) <<"------------------------------"<<endl;}

The library function is called in the initialization code, and the header file in Glog-0.3.3\src\glog needs to be added to the code engineering file, otherwise the function definition cannot be found.
Running the program in this example generates the log file in the Usr/log file under the folder where the program is running. The logs are categorized according to different levels.

Add Glog log under Arm-linux system