Before you build the TQt library and example programs, you must run the "configure" script to set the platform information and other build settings. You can use the -platform option to specify the operating system and compiler you are using. Supported platforms and compilers: aix-g++ aix-xlc aix-xlc-64 freebsd-g++ freebsd-icc irix-cc irix-cc-64 irix-g++ linux-ecc-64 linux-g++ linux-g++-64 linux-icc macx-g++ macx-pbuilder solaris-cc solaris-cc-64 solaris-g++ solaris-g++-64 win32-g++ win32-icc win32-msvc win32-msvc.net Example: ./configure -platform irix-cc-64 -shared -debug Customization: You can create your own custom configuration by adding new files to the mkspecs directory. Use existing similar configurations as a starting point.