What's Wrong with make(3)

• Hard to build multi-directory projects with libraries, include file dependencies

• Unreliable – frequent use of 'make clean' to insure everything is built consistently

• Scaling issues – Linux kernel has 19000 lines of Makefiles! (and we still have to run 'make mrproper' and 'make dep')

• Multiple versions of 'make' exist, each with own quirks, features