Re: How to use llvm15 for building a package

[Luya Tshimbalanga <luya@xxxxxxxxxxxxxxxxx>]

On 2023-07-03 17:08, Tom Stellard wrote:

On 7/3/23 11:31, Luya Tshimbalanga wrote:

Hello team,

I attempt to build openshadinglanguage with llvm15 as upstream has yet to support LLVM 16. Can someone have a pointed how to set a cmake parameter for llvm15 and its bitecode validation?

See the spec file on: https://src.fedoraproject.org/rpms/openshadinglanguage/blob/rawhide/f/openshadinglanguage.spec

Have you tried changing the BuildRequires from llvm-devel to llvm15-devel and clang-devel to clang15-devel?
It may autodetect llvm15 if you do that.

Unfortunately it did not as I had to manually set "-DLLVM_ROOT=%{_libdir}/llvm15 \".

The compiling led to the following error:

CMake Error at src/cmake/llvm_macros.cmake:43 (message):
  You must have a valid llvm bitcode generator (clang++) somewhere.
Call Stack (most recent call first):
  src/liboslexec/CMakeLists.txt:223 (EMBED_LLVM_BITCODE_IN_CPP)

-- 
Luya Tshimbalanga
Fedora Design Team
Fedora Design Suite maintainer

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