[genivi-dlt] undefined reference to dlt_* when compiling Logging example from dlt_user_manual.txt

Prigent, Christophe christophe.prigent at intel.com
Tue May 30 08:12:17 EDT 2017


Good morning,

I have some compilation errors when I'm trying the logging example from https://github.com/GENIVI/dlt-daemon/blob/master/doc/dlt_user_manual.txt (section "=== Logging example").
How can I solve it?

Thank you,
Christophe.

dltdemo.c:
----------
#include <stdio.h>
#include <dlt/dlt.h>

DLT_DECLARE_CONTEXT(mycontext);

int main()
{
   int num;

   DLT_REGISTER_APP("MYAP","My Application");
   DLT_REGISTER_CONTEXT(mycontext,"MYCT", "My Context");

   printf("Hello world");

   for(num=0;num<10;num++) {
      DLT_LOG(mycontext,DLT_LOG_INFO,DLT_STRING("Hello world"),DLT_INT(num));
      sleep(1);
   }

   DLT_UNREGISTER_CONTEXT(mycontext);
   DLT_UNREGISTER_APP();

   return 0;
}

Steps:
------
christophe at XPS12-9Q33 ~/dev/logging-example $ gcc -o dltdemo -ldlt dltdemo.c
dltdemo.c:2:17: fatal error: dlt.h: No such file or directory
compilation terminated.
christophe at XPS12-9Q33 ~/dev/logging-example $ locate dlt.h
/usr/include/qdlt/qdlt.h
/usr/local/include/dlt/dlt.h

With #include <dlt/dlt.h> instead of #include <dlt.h>:

christophe at XPS12-9Q33 ~/dev/logging-example $ gcc -o dltdemo -ldlt dltdemo.c
/tmp/ccqfNZ9M.o: In function `main':
dltdemo.c:(.text+0x72): undefined reference to `dlt_check_library_version'
dltdemo.c:(.text+0x81): undefined reference to `dlt_register_app'
dltdemo.c:(.text+0x95): undefined reference to `dlt_register_context'
dltdemo.c:(.text+0xe0): undefined reference to `dlt_user_log_write_start'
dltdemo.c:(.text+0x103): undefined reference to `dlt_user_log_write_string'
dltdemo.c:(.text+0x11a): undefined reference to `dlt_user_log_write_int'
dltdemo.c:(.text+0x129): undefined reference to `dlt_user_log_write_finish'
dltdemo.c:(.text+0x151): undefined reference to `dlt_unregister_context'
dltdemo.c:(.text+0x156): undefined reference to `dlt_unregister_app'
collect2: error: ld returned 1 exit status
christophe at XPS12-9Q33 ~/dev/logging-example $

Info:
-----
Distro: Linux Mint 18.1 Serena
Kernel: 4.4.0-53-generic x86_64 (64 bit gcc: 5.4.0)
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)


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