Llvm5.0-devel -

If you maintain a legacy out-of-tree pass—a piece of code that analyzes or transforms LLVM IR—it likely only works with the . Trying to compile that code against LLVM 18 will result in hundreds of linker errors and deprecated API warnings.

The answer is simple:

While the rest of the world has moved on, millions of lines of production code, proprietary GPU shaders, and embedded firmware still rely on the quirks and interfaces of LLVM 5.0. Let’s unpack what llvm5.0-devel actually is and when you might need to apt install or yum install it. llvm5.0-devel is the development package for LLVM version 5.0.0 (released September 2017). It contains the static libraries ( libLLVM-5.0.a ), headers ( llvm/*.h ), and CMake files required to build other compilers or tools against the LLVM 5.0 infrastructure. llvm5.0-devel

When compiling your tool against llvm5.0-devel , force the old ABI: If you maintain a legacy out-of-tree pass—a piece