At the top of llvm/test/lit.site.cfg.in (as well as clang/test/lit.site.congif.in), there is the following comment: ## Autogenerated by LLVM/Clang configuration. # Do not edit! This is true for the lit.site.cfg that is generated from lit.site.cfg.in, but not lit.site.cfg.in itself, correct? -- Eric Niebler BoostPro Computing http://www.boostpro.com