Sample run:
P:\>AddonBuilder.exe P:\broken_project P: -project=P:
2014-06-06 12:13:14,539 [INFO] - ===============================================
===========================
2014-06-06 12:13:14,540 [INFO] - WELCOME TO ADDON BUILDER
2014-06-06 12:13:14,540 [INFO] - ===============================================
===========================
Setting breakpad minidump AppID = 233800
Steam_SetMinidumpSteamID: Caching Steam ID: 76561197994125457 [API loaded no]
2014-06-06 12:13:14,701 [INFO] - Builder starting...
2014-06-06 12:13:14,703 [INFO] - Converting configs ...
2014-06-06 12:13:14,703 [INFO] - Converting cfg "P:\broken_project\config.cpp"
2014-06-06 12:13:14,740 [INFO] - [StandardOutput]=
2014-06-06 12:13:14,740 [ERROR] - [StandardError]=Include file P:\broken_project
\doesnt_exist.hpp not found.
Error reading binary file 'P:\broken_project\config.cpp'
2014-06-06 12:13:14,741 [ERROR] - CfgConvert returned error. Canceling... [resul
t]=1
2014-06-06 12:13:14,741 [INFO] - Build failed
P:\>echo %errorlevel%
0