denzp/rustc-llvm-proxy

Proxy LLVM calls into Rust own shared library in runtime

rustc-llvm-proxy's Issues

llvm path search failed

I used this with Lubuntu OS and I got an error.

Unable to find LLVM shared lib in possible locations:
- /home/elipmoc/Ruscall/target/debug/build/backtrace-sys-8182ca9299c7255f/lib/rustlib/sys-8182ca9299c7255f/codegen-backends
- /home/elipmoc/Ruscall/target/debug/build/libloading-0b292a9395ce7c46/lib/rustlib/0b292a9395ce7c46/codegen-backends
- /home/elipmoc/Ruscall/target/lib/rustlib/codegen-backends
- /home/elipmoc/Ruscall/target/debug/lib/rustlib/codegen-backends
- /usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib/rustlib/unknown-linux-gnu/codegen-backends
- /usr/local/lib/rustlib/codegen-backends

The actual LLVM path:
/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends

For reference, it shows my folder hierarchy

elipmoc@elipmoc-VirtualBox:/usr/local/lib/rustlib$ tree
.
├── channel-manifest.toml
├── components
├── etc
│   ├── debugger_pretty_printers_common.py
│   ├── gdb_load_rust_pretty_printers.py
│   ├── gdb_rust_pretty_printing.py
│   └── lldb_rust_formatters.py
├── install.log
├── manifest-cargo
├── manifest-clippy-preview
├── manifest-llvm-tools-preview
├── manifest-rls-preview
├── manifest-rust-analysis-x86_64-unknown-linux-gnu
├── manifest-rustc
├── manifest-rust-docs
├── manifest-rustfmt-preview
├── manifest-rust-std-x86_64-unknown-linux-gnu
├── rust-installer-version
├── uninstall.sh
└── x86_64-unknown-linux-gnu
    ├── analysis
    │   ├── liballoc-df62bb65f06c3fce.json
    │   ├── liballoc_jemalloc-176ad923b373d249.json
    │   ├── liballoc_system-b60481cd37bb2f9c.json
    │   ├── libcompiler_builtins-413f819da6fb7434.json
    │   ├── libcore-fc975690cfdac0c6.json
    │   ├── liblibc-f6720b49dfa826ad.json
    │   ├── libpanic_abort-1eae0a727d3c5cb1.json
    │   ├── libpanic_unwind-0a9df30e23fb9934.json
    │   ├── libprofiler_builtins-1d16405aa91e302c.json
    │   ├── librustc_asan-128db398baa86153.json
    │   ├── librustc_lsan-27591ed3ec7fea5c.json
    │   ├── librustc_msan-b956233ae5bfe7d8.json
    │   ├── librustc_tsan-5b32846900bc0a22.json
    │   ├── libstd-6d0691438ced7d3f.json
    │   ├── libstd_unicode-56ee5bd41c935122.json
    │   └── libunwind-d396f179f24659b4.json
    ├── bin
    │   ├── llvm-nm
    │   ├── llvm-objcopy
    │   ├── llvm-objdump
    │   ├── llvm-profdata
    │   ├── llvm-size
    │   ├── llvm-strip
    │   └── rust-lld
    ├── codegen-backends
    │   ├── librustc_codegen_llvm-emscripten.so
    │   └── librustc_codegen_llvm-llvm.so
    └── lib
        ├── liballoc-df62bb65f06c3fce.rlib
        ├── liballoc_jemalloc-176ad923b373d249.rlib
        ├── liballoc_system-b60481cd37bb2f9c.rlib
        ├── libarena-37e4513629a65816.so
        ├── libarrayvec-4aec608b9651c775.rlib
        ├── libatty-95997ae7d263951b.rlib
        ├── libbacktrace-f55c8e893ad42790.rlib
        ├── libbacktrace_sys-4f84d8a581d755f5.rlib
        ├── libbitflags-c5845c939d519dea.rlib
        ├── libbyteorder-26d855aacc1735ac.rlib
        ├── libcfg_if-69bd3cd6bd7ab6db.rlib
        ├── libchalk_engine-87641b4125279989.rlib
        ├── libchalk_macros-cf6fe206cce1b0cb.rlib
        ├── libcompiler_builtins-413f819da6fb7434.rlib
        ├── libcore-fc975690cfdac0c6.rlib
        ├── libcrossbeam_deque-5501106451c4f087.rlib
        ├── libcrossbeam_epoch-272e7ded227b24aa.rlib
        ├── libcrossbeam_utils-6a273381cf09c454.rlib
        ├── libdatafrog-0aa76e12c0f7d2d5.rlib
        ├── libeither-da6b3763110233dc.rlib
        ├── libena-c543cf5d7580ecb1.rlib
        ├── libenv_logger-49e6d9ecf1d6e875.rlib
        ├── libflate2-f88cb88a4ddbc667.rlib
        ├── libfmt_macros-1b05448ce826d081.so
        ├── libgetopts-6d314263cbc7d0e0.rlib
        ├── libgraphviz-4da12b0390123c7e.so
        ├── libhumantime-994dcc7f5f1bd5e3.rlib
        ├── libjobserver-6de29164b3d22782.rlib
        ├── liblazy_static-8e4b130cabf8f273.rlib
        ├── liblazy_static-e6fbb9782bd5ce3d.rlib
        ├── liblibc-316acc22f272038a.rlib
        ├── liblibc-f6720b49dfa826ad.rlib
        ├── liblog-ee903c92533839a3.rlib
        ├── liblog_settings-a97d63813549e3d7.rlib
        ├── libmemoffset-5256a5c5255f1d5d.rlib
        ├── libminiz_sys-e356c9b3031c1817.rlib
        ├── libnodrop-5babeac2841cd346.rlib
        ├── libnum_cpus-77e496f30407cacb.rlib
        ├── libowning_ref-a908249218833273.rlib
        ├── libpanic_abort-1eae0a727d3c5cb1.rlib
        ├── libpanic_unwind-0a9df30e23fb9934.rlib
        ├── libparking_lot-4a2c03932d0a6567.rlib
        ├── libparking_lot_core-6224054f1ee932fc.rlib
        ├── libpolonius_engine-0b460d04bbdff8bd.rlib
        ├── libproc_macro-fdfc8f12e4e783bf.so
        ├── libprofiler_builtins-1d16405aa91e302c.rlib
        ├── libquick_error-869939da50d782d0.rlib
        ├── librand-997ca42934a05923.rlib
        ├── libremove_dir_all-9dd784d1d34fda7d.rlib
        ├── librls_data-13d769c93cff44dd.rlib
        ├── librls_span-50d77854f7862d38.rlib
        ├── librustc_allocator-ce468f44dab60006.so
        ├── librustc_apfloat-8d0839e82948c1c3.rlib
        ├── librustc_asan-128db398baa86153.rlib
        ├── librustc_borrowck-77e618a6eee69614.so
        ├── librustc_codegen_utils-e6411a23eb0aed82.so
        ├── librustc_cratesio_shim-f0aac30220444341.so
        ├── librustc_data_structures-be4dd52612e8ff5a.so
        ├── librustc_demangle-4aa9353779238df0.rlib
        ├── librustc_driver-329ba9d6c8478143.so
        ├── librustc_errors-e54ecf9f7f8b9ba4.so
        ├── librustc-f15f2a7202b21f1a.so
        ├── librustc_hash-e9028aabd5a23ea7.rlib
        ├── librustc_incremental-ad0b3542cffb2dc7.so
        ├── librustc_lint-f7f22a66c650c305.so
        ├── librustc_lsan-27591ed3ec7fea5c.rlib
        ├── librustc_metadata-78443f5b734a9c44.so
        ├── librustc_mir-91731b3ff6f28035.so
        ├── librustc_msan-b956233ae5bfe7d8.rlib
        ├── librustc_passes-bbdf4d08e4d62eca.so
        ├── librustc_platform_intrinsics-ede7b71e1d00cedd.so
        ├── librustc_plugin-2615312bad6a88e0.so
        ├── librustc_privacy-6d744c3dd5879069.so
        ├── librustc_rayon-cccb3520e0778309.rlib
        ├── librustc_rayon_core-e2cfb5d90c5b3ee4.rlib
        ├── librustc_resolve-fd7a5b39432acc6c.so
        ├── librustc_save_analysis-564eacbc1bec4f1a.so
        ├── librustc_serialize-089c4b93b74ee632.rlib
        ├── librustc_target-b37b26d7bc7cdf0c.so
        ├── librustc_traits-c4c762409aa2caca.so
        ├── librustc_tsan-5b32846900bc0a22.rlib
        ├── librustc_typeck-81b8e9516bc1b37d.so
        ├── libscoped_tls-42fd0a4700ff0a89.rlib
        ├── libscopeguard-a4e544e422440af9.rlib
        ├── libserialize-68814a49f3a265d0.rlib
        ├── libserialize-68814a49f3a265d0.so
        ├── libsmallvec-5ccb1f7a8878c918.rlib
        ├── libstable_deref_trait-614a3830e1649fdf.rlib
        ├── libstd-6d0691438ced7d3f.rlib
        ├── libstd-6d0691438ced7d3f.so
        ├── libstd_unicode-56ee5bd41c935122.rlib
        ├── libsyntax_ext-4c5ca7fc08f26533.so
        ├── libsyntax-fe019242fcaa3e69.so
        ├── libsyntax_pos-23c841c63327c946.so
        ├── libtempfile-c3441aea3deb695b.rlib
        ├── libterm-96ac2692d7b73542.rlib
        ├── libterm-96ac2692d7b73542.so
        ├── libtermcolor-5e1ccf5abcd632d1.rlib
        ├── libtest-a5189685df267426.rlib
        ├── libtest-a5189685df267426.so
        ├── libunicode_width-b049a810a0e80b4a.rlib
        ├── libunreachable-cb46f3bf74d5a7b8.rlib
        ├── libunwind-d396f179f24659b4.rlib
        └── libvoid-45a8d14566a1ff0b.rlib

6 directories, 147 files

Undefined Reference to LLVMRunFunction

Hi, this crate is great for me :)

I met a link issue while testing a simple code generation example of LLVM:

https://github.com/termoshtt/rustc-llvm-proxy-example/blob/master/src/main.rs

/home/travis/build/termoshtt/rustc-llvm-proxy-example/src/main.rs:87: undefined reference to `LLVMVerifyModule'
/home/travis/build/termoshtt/rustc-llvm-proxy-example/src/main.rs:110: undefined reference to `LLVMLinkInInterpreter'
/home/travis/build/termoshtt/rustc-llvm-proxy-example/src/main.rs:111: undefined reference to `LLVMCreateInterpreterForModule'
/home/travis/build/termoshtt/rustc-llvm-proxy-example/src/main.rs:123: undefined reference to `LLVMRunFunction'
/home/travis/build/termoshtt/rustc-llvm-proxy-example/src/main.rs:130: undefined reference to `LLVMGenericValueToInt'
collect2: error: ld returned 1 exit status

https://travis-ci.org/termoshtt/rustc-llvm-proxy-example/jobs/429177101

rustc-llvm-proxy does links basic APIs e.g. LLVMCreateBuilder, LLVMModuleCreateWithName, and so on, but some APIs are lacked as listed above. I guess it missing to link libLLVMExecutionEngine.a and libLLVMAnalysis.a.
Is this intended behavior or bug?

*-pc-windows-msvc Rustc targets are not supported

Shared LLVM lib exports a very limited amount of symbols for the targets.

tests fail with: Unable to find symbol 'LLVMModuleCreateWithName' in the LLVM shared lib
ptx-linker fails with: Unable to find symbol 'LLVMContextCreate' in the LLVM shared lib

If that can't be fixed, we should at least provide a meaningful error message and a hint to use *-pc-windows-gnu.