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Jack's correct about moving this to autoconf at gnu.org. However, you can start by cutting and pasting the configure.ac bits from the same github repo I pointed you to earlier today. The actual commit that brought those changes may be easier to use as a template. https://github.com/google/autofdo/pull/30/commits/0029f4be825f851b9d99bcd19dcb34fd59f1775e On Wed, Mar 23, 2016 at 4:35 PM,

I'm writing a C++ program that uses LLVM, and trying to build it with autotools. Thanks to Diego Novillo, there is an M4 macro that detects llvm-config: https://github.com/google/autofdo/blob/master/m4/ax_llvm.m4 How do I use it? Given that I've written a basic configure.ac that can compile a basic C++ program, how do I modify it to make use of the macro? And should the macro be copied