Hello, i am trying to the set the name of thread with:

    import core.thread;
    auto thisThread = Thread.getThis();
    thisThread.name = "kiwi";

but GDB prints the name of the programm ("helloworld")

    [Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
    Edit source/app.d to start your project.
    ^C
    Program received signal SIGINT, Interrupt.
    D main () at source/app.d:17
    17          }
    (gdb) info threads
      Id   Target Id         Frame
* 1 Thread 0x7ffff7fd0800 (LWP 3232) "helloworld" D main () at source/app.d:17

Next thing i tried was calling pthread_setname_np (Linux) but it seams that is not defined in phobos, so i tried to delcare it by my self:

    import core.sys.posix.pthread;
    import std.string;
    extern(C) int pthread_setname_np(pthread_t, const char*);
    pthread_setname_np(pthread_self(), toStringz("thread_name"));

but this gives me
   helloworld ~master: building configuration "application"...
dmd -c -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -debug -g -w -version=Have_helloworld -Isource/ source/app.d source/kiwi.d -vcolumns
   Linking...
dmd -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -L--no-as-needed -g .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o: In function `_Dmain': /home/keywan/hello_world/source/app.d:13: undefined reference to `_D3app4mainFZ18pthread_setname_npUmxPaZi'
   collect2: error: ld returned 1 exit status
   --- errorlevel 1
FAIL .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/ helloworld executable
   dmd failed with exit code 1.

sorry for asking stupid questions but my background is more PHP,Perl,Java... any help would be appreciated. (context i am trying to make debugging easier by giving the threads names)

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