[frameworks: 15 llvm] fails with llvm/clang 14.0.0

[lazka]

As pointed out here: #10248 (comment)

The error I see in the logs (check_source_compiles: C: needs to be enabled before use.) suggest it is llvm/llvm-project#53950

And indeed

diff --git a/mesonbuild/dependencies/data/CMakeListsLLVM.txt b/mesonbuild/dependencies/data/CMakeListsLLVM.txt
index 9d3e41234..4084597d3 100644
--- a/mesonbuild/dependencies/data/CMakeListsLLVM.txt
+++ b/mesonbuild/dependencies/data/CMakeListsLLVM.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${C
 
 set(PACKAGE_FOUND FALSE)
 
+project(MesonTemp LANGUAGES C CXX)
+
 while(TRUE)
   find_package(LLVM REQUIRED CONFIG QUIET)

seems to make it work here.

I see that the generic CMakeLists file has some logic to inject the language, so I'm not sure if that should be extended or if the above patch is enough.

based on the file history -> pinging @mensinda

[mensinda]

Should be fixed with #10250.

[lazka]

thanks!