Hello everyone,

im fairly new to open-source programming and have never used scons 
before, so be patient with me :) . Now to my problem: I want to extend 
mixxx with an additional window which should visualize something in the 
future. For this purpose I simply wanted to include a C file into one of 
the mixxx classes and a call a function from that class. but when im 
trying to build mixxx i get this error message:

Undefined symbols for architecture x86_64:
   "_postTimecodeOnDiskPlay", referenced from:
       VinylControlXwax::run()      in vinylcontrolxwax.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
scons: *** [osx64_build/mixxx] Error 1
scons: building terminated because of errors.

I included the header file of my C Class in vinylcontrolxwax.h:

extern "C" {
#include "timecoder.h"
#include "InterfaceForDiskPlay.h"

and then call "postTimecodeOnDiskPlay()" from the vinylcontrolxwax.cpp 

What am I doing wrong?


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