Link error on Mac OS-X

[Gretsch]

Hi all,

Long time since I posted last, also long time since I coded !

Anyhow, I've moved on from Linux to OS X and am trying to re-compile my app to run under mac. Issue I'm having is getting a link error.
Qt version:

Qt Creator 3.3.0 (opensource)
Based on Qt 5.4.0 (Clang 6.0 (Apple), 64 bit)

Built on Dec 8 2014 at 15:34:58

From revision d36c4d87db

qmake output is:

08:11:05: Starting: "/Users/vi/Qt/5.4/clang_64/bin/qmake" /Users/vi/Qt/BudgetTracker/BudgetTracker.pro -r -spec macx-g++ CONFIG+=debug CONFIG+=x86_64 QT+=widgets QT+=printsupport
08:11:06: The process "/Users/vi/Qt/5.4/clang_64/bin/qmake" exited normally.

When I try to build the project I get:

ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [BudgetTracker.app/Contents/MacOS/BudgetTracker] Error 1
08:14:21: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project BudgetTracker (kit: Desktop)
When executing step "Make"

I should also mention it's failing when referencing a NCReport file (Ver 2.12.3)

Undefined symbols for architecture x86_64:
  "NCReportPreviewWindow::setOutput(NCReportPreviewOutput*)", referenced from:
      MainWindow::printMenu() in mainwindow.o
etc etc etc...

Undefined symbols for architecture x86_64:
  "NCReportPreviewWindow::setOutput(NCReportPreviewOutput*)", referenced from:
      MainWindow::printMenu() in mainwindow.o
etc etc etc...

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I think it may have something to do with selecting the right compiler or kit ?