Yeah dependencies. Incremental builds are much faster. Try a make clean vs ninja clean. Ninja is a whole lot faster. I just rewrote the build scripts for a qnx

Yeah dependencies. Incremental builds are much faster. Try a make clean vs ninja clean. Ninja is a whole lot faster. I just rewrote the build scripts for a qnx makefile based system in CMake. The ninja build files brought down the build time from approximately 18 mins. to 5 mins! Incremental build time came down from 7 mins to about 30 seconds! Admittedly this was probably an extreme case where consultants got comfortable charging by the minute. Send me an email if you are interested in moving to CMake. I'll be willing to consult.