Linux:

Code Coverage:

This package provides a shallow wrapper around the LLVM C API.

The entire API, wrapped by means of Clang.jl, is available in the LLVM.API submodule. Higher-level wrappers are part of the LLVM top-level module, and are added as the need arises (see COVERAGE.md for a list of wrapped functions).

Version requirements:

• LLVM 3.9 or higher, in full (ie. not only libLLVM.so, but also llvm-config, headers, etc)
• Julia 0.5 or higher
• C++ compiler, and possibly some development headers (like libz1, zlib1g-dev on many popular Linux distributions)

Either install the package using Pkg, or manually clone it and run deps/build.jl which detects available LLVM installations and builds a library with additional API functions. The best matching installation of LLVM will be selected, but any version can be forced by setting the LLVM_VER environment variable at build time. The script will only load LLVM libraries bundled with Julia, but that can be overridden by defining USE_SYSTEM_LLVM.

If installation fails, re-run with the DEBUG environment variable set to 1 (as well as running Julia with --compilecache=no), and attach that output to a bug report.

The build step might fail at building the llvm-extra wrapper with errors like the following:

IR/Pass.o:(.data.rel.ro._ZTVN4llvm15JuliaModulePassE[_ZTVN4llvm15JuliaModulePassE]+0x40): undefined reference to `llvm::ModulePass::createPrinterPass(llvm::raw_ostream&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'
IR/Pass.o:(.data.rel.ro._ZTVN4llvm17JuliaFunctionPassE[_ZTVN4llvm17JuliaFunctionPassE]+0x40): undefined reference to `llvm::FunctionPass::createPrinterPass(llvm::raw_ostream&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'
IR/Pass.o:(.data.rel.ro._ZTVN4llvm19JuliaBasicBlockPassE[_ZTVN4llvm19JuliaBasicBlockPassE]+0x40): undefined reference to `llvm::BasicBlockPass::createPrinterPass(llvm::raw_ostream&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'
collect2: error: ld returned 1 exit status

IR/Pass.o:(.data.rel.ro._ZTVN4llvm15JuliaModulePassE[_ZTVN4llvm15JuliaModulePassE]+0x40): undefined reference to `llvm::ModulePass::createPrinterPass(llvm::raw_ostream&, std::string const&) const'
IR/Pass.o:(.data.rel.ro._ZTVN4llvm17JuliaFunctionPassE[_ZTVN4llvm17JuliaFunctionPassE]+0x40): undefined reference to `llvm::FunctionPass::createPrinterPass(llvm::raw_ostream&, std::string const&) const'
IR/Pass.o:(.data.rel.ro._ZTVN4llvm19JuliaBasicBlockPassE[_ZTVN4llvm19JuliaBasicBlockPassE]+0x40): undefined reference to `llvm::BasicBlockPass::createPrinterPass(llvm::raw_ostream&, std::string const&) const'
collect2: error: ld returned 1 exit status

These indicate a mismatch between the C++ ABI of the LLVM library (more specifically, caused by the C++11 ABI change), and what your compiler selects by default. The Makefile in this package tries to detect any C++11 ABI symbols in the selected LLVM library and configures GLIBC accordingly, but this detection might fail when objdump is not available on your system, or might not help if the target compiler doesn't support said ABI.

Most if these issues can be fixed by using the same compiler LLVM was build with to compile llvm-extra. You can override the selected compiler by defining the CC and CXX environment variables, eg. CC=clang CXX=clang++ julia -e 'Pkg.build("LLVM")'.