Julia: Julia 1.9.0 :ERROR: LoadError: Unable to open libLLVM! when llvm is installed in Windows environment

Question

I get an error message when I add SeisIO package in Julia 1.9.0 (Windows 11 environment),which introduces me that"ERROR: Error building LightXML:ERROR: LoadError: Unable to open libLLVM!".Codes are following:

(@v1.9) pkg> add SeisIO; build; precompile
   Resolving package versions...
  No Changes to `C:\Users\47136\.julia\environments\v1.9\Project.toml`
  No Changes to `C:\Users\47136\.julia\environments\v1.9\Manifest.toml`
    Building WebIO ────→ `C:\Users\47136\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\976d0738247f155d0dcd77607edea644f069e1e9\build.log`
    Building Blink ────→ `C:\Users\47136\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\08d0b679fd7caa49e2bca9214b131289e19808c0\build.log`
    Building PlotlyJS ─→ `C:\Users\47136\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\7452869933cd5af22f59557390674e8679ab2338\build.log`
    Building LightXML ─→ `C:\Users\47136\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\be855e3c975b89746b09952407c156b5e4a33a1d\build.log`
ERROR: Error building `LightXML`:
ERROR: LoadError: Unable to open libLLVM!
Stacktrace:
  [1] error(s::String)
    @ Base .\error.jl:35
  [2] (::BinaryProvider.var"#open_libllvm#124")()
    @ BinaryProvider C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\PlatformNames.jl:652
  [3] detect_cxx11_string_abi()
    @ BinaryProvider C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\PlatformNames.jl:655
  [4] detect_compiler_abi()
    @ BinaryProvider C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\PlatformNames.jl:668
  [5] top-level scope
    @ C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\PlatformNames.jl:685
  [6] include(mod::Module, _path::String)
    @ Base .\Base.jl:457
  [7] include(x::String)
    @ BinaryProvider C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\BinaryProvider.jl:1
  [8] top-level scope
    @ C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\BinaryProvider.jl:12
  [9] include
    @ .\Base.jl:457 [inlined]
 [10] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::String)
    @ Base .\loading.jl:2012
 [11] top-level scope
    @ stdin:2
in expression starting at C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\PlatformNames.jl:685
in expression starting at C:\Users\47136\.julia\packages\BinaryProvider\U2dKK\src\BinaryProvider.jl:1
in expression starting at stdin:2
ERROR: LoadError: Failed to precompile BinaryProvider [b99e7846-7c00-51b0-8f62-c81ae34c0232] to "C:\\Users\\47136\\.julia\\compiled\\v1.9\\BinaryProvider\\jl_9954.tmp".
Stacktrace:
  [1] error(s::String)
    @ Base .\error.jl:35
  [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, keep_loaded_modules::Bool)
    @ Base .\loading.jl:2262
  [3] compilecache
    @ .\loading.jl:2129 [inlined]
  [4] _require(pkg::Base.PkgId, env::String)
    @ Base .\loading.jl:1772
  [5] _require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:1623
  [6] macro expansion
    @ .\loading.jl:1611 [inlined]
  [7] macro expansion
    @ .\lock.jl:267 [inlined]
  [8] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:1574
  [9] include(fname::String)
    @ Base.MainInclude .\client.jl:478
 [10] top-level scope
    @ C:\Users\47136\.julia\packages\LightXML\W8FVT\deps\build.jl:1
 [11] include(fname::String)
    @ Base.MainInclude .\client.jl:478
 [12] top-level scope
    @ none:5
in expression starting at C:\Users\47136\.julia\packages\LightXML\W8FVT\deps\build_Zlib.v1.2.11.jl:1
in expression starting at C:\Users\47136\.julia\packages\LightXML\W8FVT\deps\build.jl:1

I have checked libLLVM version by versioninfo:

julia> versioninfo()
Julia Version 1.9.0-rc2
Commit 72aec423c2 (2023-04-01 10:41 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 12 × Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, skylake)
  Threads: 1 on 12 virtual cores
Environment:
  JULIA_PKG_SERVER = https://mirrors.bfsu.edu.cn/julia

I have updated the version of Julia,the version of packages,but I have not instlled the LLVM once again.I hope to find the reason of "unable to open libLLVM"and fix it,and add the SeisIO pacakge to my Julia in win11 environment.thanks!

Answer 1

Simply run @show Base.libllvm_path() under the julia prompt to see if there's a dll file, then copy and rename that file to libLLVM.dll.

julia> @show Base.libllvm_path()
Base.libllvm_path() = Symbol("D:\\Dev\\Julia\\bin\\libLLVM-14jl.dll")
Symbol("D:\\Dev\\Julia\\bin\\libLLVM-14jl.dll")

For Win10, the same problem I met when I built LibPQ with Julia-1.9.2, and this method worked!