Remove the -cmake-makefiles configure argument as its meaning was in essence "do not pass a -G argument to CMake". Instead, we add the following arguments: -cmake-generator <name> to pass -G <name> to CMake -cmake-use-default-generator to pass no -G argument to CMake If none of those arguments is given, we try to autodetect the generator. If a ninja executable is found, we prefer the Ninja generator. On Unix we fall back to "Unix Makefiles". On Windows, we do a poor man's compiler detection and select one of "NMake Makefiles", "NMake Makefiles JOM" and "MinGW Makefiles". Change-Id: Ic36669bd50956d15fbc71cee73720732cd4bfab8 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>