JuliaLang/julia — pull request #902 by bpowers (2012-05-30 21:01:26+00:00)
Title: build: don't re-configure LLVM each make invocation

When LLVM is reconfigured, it rewrites a config header, which causes
its build system to assume a great many (all?) object files are out of
date, triggering a massive and unnecessary recompile. By moving the
configure step out of the $(LLVM_OBJ_SOURCE) target we can avoid this.