Upgrading autoconf =============================================================================== If you are in the mood to upgrade autoconf, you should: 1. Consider not upgrading. 2. No really, this is a hassle, you don't want to do it. 3. Get the new version of autoconf and put it in <SRC> 4. configure/build/install autoconf with --prefix=<PFX> 5. Run autoupdate on all the m4 macros in llvm/autoconf/m4 6. Run autoupdate on llvm/autoconf/configure.ac 7. Regenerate configure script with AutoRegen.sh 8. If there are any warnings from AutoRegen.sh, fix them and go to step 7. 9. Test, test, test.