On Fri, Mar 16, 2018 at 6:20 AM, Arch Website Notification nobody@archlinux.org wrote:

The todo list "LLVM 6.0" has had the following packages added to it for which you are a maintainer:

• community/crystal (x86_64) - https://www.archlinux.org/packages/community/x86_64/crystal/

Todo list information: Name: LLVM 6.0 URL: https://www.archlinux.org/todo/llvm-60/ Creator: Evangelos Foutras Description: libLLVM-5.0.so -> libLLVM-6.0.so libclang.so.5 -> libclang.so.6

In addition to the above soname changes, our clang package no longer ships static libraries. Instead, those are built as individual shared libraries (using CMake's BUILD_SHARED_LIBS flag).

** I'll add LLVM 5 packages once it's clear they are needed for software that hasn't been ported to LLVM 6 yet. Feel free to ping me on IRC for this. **

Hello Evangelos

I tried to rebuilt Crystal package with LLVM and hit a compilation issue

./bin/crystal build --release --no-debug -D i_know_what_im_doing -o .build/crystal src/compiler/crystal.cr -D without_openssl -D without_zlib _main.o: In function `*Crystal::Compiler#pass_manager_builder:LLVM::PassManagerBuilder': main_module:(.text+0x52dc08): undefined reference to `LLVMInitializeInstCombine' collect2: error: ld returned 1 exit status

That described here https://github.com/crystal-lang/crystal/issues/5556 and it turns out to be a LLVM bug https://bugs.llvm.org/show_bug.cgi?id=35947.

This LLVM bug is fixed in HEAD (https://reviews.llvm.org/D44140) and should be released in 6.0.1. Or maybe we can pull it to the Arch package?