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I see the issue. Right-click on your project in the Project Explorer view and click on Properties in the menu. In the Properties dialog, select the C/C++ Build tab, and then ensure the "Generate Makefiles automatically" is enabled. Then click OK to close the dialog. Now when you build, the makefile is generated and the build should complete. I don't know if this is intended or not, but it doesn't seem very obvious to me; I'll raise the issue internally within ARM.