Building V8 in Ubuntu 64 bit

If you are trying to build Google V8 in a Ubuntu 64bit machine you might get

/usr/include/gnu/stubs.h:7:27: error: gnu/stubs-32.h: No such file or directory

error when you ran scons with default arguments. When default arguments are used, it tries to guess the OS. In my case it failed to detect the correct architecture (i.e. x64). So you can specify arch argument when you run the scons to manually set the architecture. i.e.

scons arch=x64

arch argument accepts any of arm, ia32, x64 or mips