Hey guys, I have a problem. Some minutes before, my project with QCP worked perfect, but now, I get some errors, without changing the code...
./debug\qcustomplot.o: In function `ZN19QCPPaintBufferGlFbo5clearERK6QColor':
C:\..../QCustomPlot/qcustomplot.cpp:909: undefined reference to `_imp__glClearColor@16'
C:\..../QCustomPlot/qcustomplot.cpp:910: undefined reference to `_imp__glClear@4'
collect2.exe: error: ld returned 1 exit status
mingw32-make: *** [debug\graphicviewer.exe] Error 1
Why I get this error without changing anything? Qmake and rebuilding the project didnt help, also downloaded the source-files again and pasted them in the folder, also didnt help....