Buildroot
Buildroot is primarily intended to be used with small or embedded systems based on various computer architectures and instruction set architectures ( ISAs ) , including x86 , ARM , MIPS and PowerPC . 
<triplet> instruction set architecture <subj> computer architectures <obj> facet of <triplet> x86 <subj> instruction set architecture <obj> instance of <triplet> MIPS <subj> instruction set architecture <obj> instance of <triplet> PowerPC <subj> instruction set architecture <obj> instance of