Incremental Build?

[Andy Chien]

Hello,

I'm making some modifications to libc for testing purpose in my own
project. All the build instructions I can find basically says to do
run configure, make and make install.  However, the build time is
fairly long even on modern, fast computer which makes iteration time
painful.  I was wondering if there is any tips or tricks to build
incrementally or speed up the process some how?  Thanks

Andy