Macro is necessary on windows, otherwise the M_PI macro is missing.
Build fails with:
qjackctlGraph.cpp: In member function 'void qjackctlGraphConnect::updatePathTo(const QPointF&)':
qjackctlGraph.cpp:982:55: error: 'M_PI' was not declared in this scope
982 | const qreal arrow_angle = path.angleAtPercent(0.5) * M_PI / 180.0;
Macro is necessary on windows, otherwise the M_PI macro is missing. Build fails with: