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Compiling Solang to WebAssembly #497

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talentlessguy opened this issue Sep 24, 2021 · 18 comments
Open

Compiling Solang to WebAssembly #497

talentlessguy opened this issue Sep 24, 2021 · 18 comments
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enhancement New feature or request help wanted Extra attention is needed

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@talentlessguy
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Hello, I'm writing a Deno library for Solidity compiler bindings and I decided to try to wrap Solang.

I am following this guide for compiling Rust to WebAssembly: https://depth-first.com/articles/2020/06/29/compiling-rust-to-webassembly-a-simple-example/

my linux kernel version is 5.10.63, distro is Manjaro Linux

I installed lld, lib32-llvm, libc++, rustc 1.53, rustup 1.24.3

and added this to Cargo.toml:

[dependencies]
getrandom = { version = "0.2", features = ["js"] }

and tried to run cargo build --target wasm32-unknown-unknown --release

and I get this:

error[E0412]: cannot find type `c_int` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/lto.rs:414:89
    |
414 |     pub fn thinlto_debug_options(options: *const *const ::libc::c_char, number: ::libc::c_int);
    |                                                                                         ^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
11  | use std::os::raw::c_int;
    |

error[E0412]: cannot find type `c_char` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/lto.rs:423:30
    |
423 |         name: *const ::libc::c_char,
    |                              ^^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
11  | use std::os::raw::c_char;
    |

error[E0412]: cannot find type `c_int` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/lto.rs:424:25
    |
424 |         length: ::libc::c_int,
    |                         ^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
11  | use std::os::raw::c_int;
    |

error[E0412]: cannot find type `c_char` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/lto.rs:433:30
    |
433 |         name: *const ::libc::c_char,
    |                              ^^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
11  | use std::os::raw::c_char;
    |

error[E0412]: cannot find type `c_int` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/lto.rs:434:25
    |
434 |         length: ::libc::c_int,
    |                         ^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
11  | use std::os::raw::c_int;
    |

error[E0412]: cannot find type `c_char` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/object.rs:104:81
    |
104 |     pub fn LLVMGetSectionContents(SI: LLVMSectionIteratorRef) -> *const ::libc::c_char;
    |                                                                                 ^^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
3   | use std::os::raw::c_char;
    |

error[E0412]: cannot find type `c_char` in crate `libc`
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/object.rs:124:90
    |
124 |     pub fn LLVMGetRelocationValueString(RI: LLVMRelocationIteratorRef) -> *const ::libc::c_char;
    |                                                                                          ^^^^^^ not found in `libc`
    |
help: consider importing this type alias
    |
3   | use std::os::raw::c_char;
    |

error[E0412]: cannot find type `c_void` in crate `libc`
 --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/llvm-sys-120.2.1/src/orc2/lljit.rs:7:27
  |
7 |         Ctx: *mut ::libc::c_void,
  |                           ^^^^^^ not found in `libc`
  |
help: consider importing this enum
  |
1 | use std::os::raw::c_void;
  |

What should I install from C/C++ libraries to make it compile?

thanks in advance
@talentlessguy talentlessguy changed the title Compiling to WebAssembly Compiling Solang to WebAssembly Sep 24, 2021
@seanyoung seanyoung added the enhancement New feature or request label Sep 24, 2021
@seanyoung
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I think solang should be compiled to wasi, like so:

cargo build --target wasm32-wasi --release

Then again I don't know if node and/or browsers support wasi.

If I try that, I just get an error about llvm not being found: the llvm libraries needs to built for wasm first. I've tried to do this with clang and failed, I was going to do this with emscripten next.

@seanyoung
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Also @talentlessguy thank you for looking at porting solang to webassembly, this is really needed 😄

@talentlessguy
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talentlessguy commented Sep 24, 2021 •
edited
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@seanyoung

  1. Yes there's wasi in Node.js and std/wasi in Deno
  2. It still fails but for different reasons:
➜ cargo build --target wasm32-wasi --release
   Compiling lsp-types v0.89.2
   Compiling contract-metadata v0.3.0
   Compiling inkwell v0.1.0-beta.3
   Compiling solang v0.1.8 (/home/v1rtl/Coding/forks/solang)
The following warnings were emitted during compilation:

warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
warning: In file included from /usr/include/llvm/ADT/Hashing.h:48:
warning: In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
warning: /usr/include/llvm/Support/Compiler.h:21:10: fatal error: 'new' file not found
warning: #include <new>
warning:          ^~~~~
warning: 1 error generated.

error: failed to run custom build command for `solang v0.1.8 (/home/v1rtl/Coding/forks/solang)`

Caused by:
  process didn't exit successfully: `/home/v1rtl/Coding/forks/solang/target/release/build/solang-7656b77601092452/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=src/parser/solidity.lalrpop
  TARGET = Some("wasm32-wasi")
  OPT_LEVEL = Some("3")
  HOST = Some("x86_64-unknown-linux-gnu")
  CXX_wasm32-wasi = None
  CXX_wasm32_wasi = None
  TARGET_CXX = None
  CXX = None
  CXXFLAGS_wasm32-wasi = None
  CXXFLAGS_wasm32_wasi = None
  TARGET_CXXFLAGS = None
  CXXFLAGS = None
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("false")
  running: "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "-Wall" "-Wextra" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp"
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/Hashing.h:48:
  cargo:warning=In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
  cargo:warning=/usr/include/llvm/Support/Compiler.h:21:10: fatal error: 'new' file not found
  cargo:warning=#include <new>
  cargo:warning=         ^~~~~
  cargo:warning=1 error generated.
  exit status: 1

  --- stderr


  error occurred: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "-Wall" "-Wextra" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp" with args "clang" did not execute successfully (status code exit status: 1).


warning: build failed, waiting for other jobs to finish...
error[E0308]: mismatched types
   --> /home/v1rtl/.cargo/registry/src/github.com-1ecc6299db9ec823/inkwell-0.1.0-beta.3/src/module.rs:601:95
    |
601 |     pub fn write_bitcode_to_file(&self, file: &File, should_close: bool, unbuffered: bool) -> bool {
    |            ---------------------                                                              ^^^^ expected `bool`, found `()`
    |            |
    |            implicitly returns `()` as its body has no tail or `return` expression

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: build failed

for more context:

I have:

  • gcc 11.1.0
  • llvm 12.0.1-4

@seanyoung
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So there are two issues:

  • clang needs the wasi sdk. Copy this into your clang directory and add --sysroot=wasi-sysroot.. using TARGET_CFLAGS and TARGET_CXXFLAGS
  • inkwell needs a little patch, working on that

@seanyoung
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With that done a whole new world of pain is opened: linking. This requires a wasm build of llvm which can be done with emscripten, I think. I don't have it working yet.

@talentlessguy
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talentlessguy commented Sep 24, 2021 •
edited
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@seanyoung It still errors:

$ env TARGET_CFLAGS=--sysroot=wasi-sysroot.. TARGET_CXXFLAGS=--sysroot=wasi-sysroot cargo build --target wasm32-wasi --release
   Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=master#d018ee22)
   Compiling solang v0.1.8 (/home/v1rtl/Coding/forks/solang)
The following warnings were emitted during compilation:

warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
warning: In file included from /usr/include/llvm/ADT/Hashing.h:48:
warning: In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
warning: /usr/include/llvm/Support/Compiler.h:21:10: fatal error: 'new' file not found
warning: #include <new>
warning:          ^~~~~
warning: 1 error generated.

error: failed to run custom build command for `solang v0.1.8 (/home/v1rtl/Coding/forks/solang)`

Caused by:
  process didn't exit successfully: `/home/v1rtl/Coding/forks/solang/target/release/build/solang-7656b77601092452/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=src/parser/solidity.lalrpop
  TARGET = Some("wasm32-wasi")
  OPT_LEVEL = Some("3")
  HOST = Some("x86_64-unknown-linux-gnu")
  CXX_wasm32-wasi = None
  CXX_wasm32_wasi = None
  TARGET_CXX = None
  CXX = None
  CXXFLAGS_wasm32-wasi = None
  CXXFLAGS_wasm32_wasi = None
  TARGET_CXXFLAGS = Some("--sysroot=wasi-sysroot")
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("false")
  running: "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "--sysroot=wasi-sysroot" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp"
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/Hashing.h:48:
  cargo:warning=In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
  cargo:warning=/usr/include/llvm/Support/Compiler.h:21:10: fatal error: 'new' file not found
  cargo:warning=#include <new>
  cargo:warning=         ^~~~~
  cargo:warning=1 error generated.
  exit status: 1

  --- stderr


  error occurred: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "--sysroot=wasi-sysroot" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp" with args "clang" did not execute successfully (status code exit status: 1).


warning: build failed, waiting for other jobs to finish...
error[E0308]: mismatched types
   --> /home/v1rtl/.cargo/git/checkouts/inkwell-946411d814d2c9f8/d018ee2/src/module.rs:601:95
    |
601 |     pub fn write_bitcode_to_file(&self, file: &File, should_close: bool, unbuffered: bool) -> bool {
    |            ---------------------                                                              ^^^^ expected `bool`, found `()`
    |            |
    |            implicitly returns `()` as its body has no tail or `return` expression

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: build failed

I have clang and wasi-sdk both installed to /usr/bin

@seanyoung
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You need to set the correct sysroot for the wasi sdk (share/sysroot in wasi-sdk).

inkwell needs this fix: TheDan64/inkwell#270

@talentlessguy
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talentlessguy commented Sep 24, 2021 •
edited
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@seanyoung oops sorry I found out the location of sysroot it was in /opt/wasi-sdk

but now I get this:

➜ echo $WASI_SDK_PATH
/opt/wasi-sdk/wasi-sysroot
➜ env TARGET_CFLAGS=--sysroot=$WASI_SDK_PATH TARGET_CXXFLAGS=--sysroot=$WASI_SDK_PATH cargo build --target wasm32-wasi --release
   Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=master#d018ee22)
   Compiling solang v0.1.8 (/home/v1rtl/Coding/forks/solang)
The following warnings were emitted during compilation:

warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
warning: In file included from /usr/include/llvm/ADT/Hashing.h:48:
warning: In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
warning: In file included from /usr/include/llvm/Support/Compiler.h:21:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/new:89:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/__config:1209:2: error: _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
warning: #error _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
warning:  ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
warning: In file included from /usr/include/llvm/ADT/Hashing.h:48:
warning: In file included from /usr/include/llvm/Support/ErrorHandling.h:18:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/string:506:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/string_view:175:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/__string:57:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/algorithm:643:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/memory:668:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/typeinfo:225:16: error: reinterpret_cast from 'std::__type_info_implementations::__non_unique_arm_rtti_bit_impl::__type_name_t' (aka 'unsigned int') to 'size_t' (aka 'unsigned long') is not allowed
warning:         return reinterpret_cast<size_t>(__v);
warning:                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:19:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
warning: In file included from /usr/include/limits.h:124:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
warning: In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:4:
warning: /opt/wasi-sdk/wasi-sysroot/include/__typedef_time_t.h:5:19: error: typedef redefinition with different types ('long long' vs '__time_t' (aka 'long'))
warning: typedef long long time_t;
warning:                   ^
warning: /usr/include/bits/types/time_t.h:7:18: note: previous definition is here
warning: typedef __time_t time_t;
warning:                  ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:19:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
warning: In file included from /usr/include/limits.h:124:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
warning: In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:5:
warning: /opt/wasi-sdk/wasi-sysroot/include/__typedef_suseconds_t.h:6:19: error: typedef redefinition with different types ('long long' vs '__suseconds_t' (aka 'long'))
warning: typedef long long suseconds_t;
warning:                   ^
warning: /usr/include/sys/types.h:138:23: note: previous definition is here
warning: typedef __suseconds_t suseconds_t;
warning:                       ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:19:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
warning: In file included from /usr/include/limits.h:124:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
warning: In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
warning: /opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:8:8: error: redefinition of 'timeval'
warning: struct timeval {
warning:        ^
warning: /usr/include/bits/types/struct_timeval.h:8:8: note: previous definition is here
warning: struct timeval
warning:        ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:19:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
warning: In file included from /usr/include/limits.h:124:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
warning: In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
warning: In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:270:
warning: /opt/wasi-sdk/wasi-sysroot/include/__struct_timespec.h:7:8: error: redefinition of 'timespec'
warning: struct timespec {
warning:        ^
warning: /usr/include/bits/types/struct_timespec.h:10:8: note: previous definition is here
warning: struct timespec
warning:        ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:20:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:321:9: error: no member named 'signbit' in the global namespace; did you mean '__signbit'?
warning: using ::signbit;
warning:       ~~^
warning: /usr/include/bits/mathcalls-helper-functions.h:24:24: note: '__signbit' declared here
warning: __MATHDECL_ALIAS (int, __signbit,, (_Mdouble_ __value), signbit)
warning:                        ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:20:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:322:9: error: no member named 'fpclassify' in the global namespace; did you mean '__fpclassify'?
warning: using ::fpclassify;
warning:       ~~^
warning: /usr/include/bits/mathcalls-helper-functions.h:20:24: note: '__fpclassify' declared here
warning: __MATHDECL_ALIAS (int, __fpclassify,, (_Mdouble_ __value), fpclassify)
warning:                        ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:20:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:323:9: error: no member named 'isfinite' in the global namespace
warning: using ::isfinite;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:324:9: error: no member named 'isinf' in the global namespace
warning: using ::isinf;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:325:9: error: no member named 'isnan' in the global namespace
warning: using ::isnan;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:326:9: error: no member named 'isnormal' in the global namespace
warning: using ::isnormal;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:327:7: error: no member named 'isgreater' in the global namespace; did you mean '::std::greater'?
warning: using ::isgreater;
warning:       ^~
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/functional:742:29: note: '::std::greater' declared here
warning: struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool>
warning:                             ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:20:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:328:7: error: no member named 'isgreaterequal' in the global namespace; did you mean '::std::greater_equal'?
warning: using ::isgreaterequal;
warning:       ^~
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/functional:771:29: note: '::std::greater_equal' declared here
warning: struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool>
warning:                             ^
warning: In file included from src/linker/linker.cpp:2:
warning: In file included from /usr/include/lld/Common/Driver.h:12:
warning: In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
warning: In file included from /usr/include/llvm/ADT/SmallVector.h:19:
warning: In file included from /usr/include/llvm/Support/MathExtras.h:20:
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:329:9: error: no member named 'isless' in the global namespace
warning: using ::isless;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:330:9: error: no member named 'islessequal' in the global namespace
warning: using ::islessequal;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:331:9: error: no member named 'islessgreater' in the global namespace
warning: using ::islessgreater;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:332:9: error: no member named 'isunordered' in the global namespace
warning: using ::isunordered;
warning:       ~~^
warning: /opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:333:9: error: no member named 'isunordered' in the global namespace
warning: using ::isunordered;
warning:       ~~^
warning: 19 errors generated.

error: failed to run custom build command for `solang v0.1.8 (/home/v1rtl/Coding/forks/solang)`

Caused by:
  process didn't exit successfully: `/home/v1rtl/Coding/forks/solang/target/release/build/solang-7656b77601092452/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=src/parser/solidity.lalrpop
  TARGET = Some("wasm32-wasi")
  OPT_LEVEL = Some("3")
  HOST = Some("x86_64-unknown-linux-gnu")
  CXX_wasm32-wasi = None
  CXX_wasm32_wasi = None
  TARGET_CXX = None
  CXX = None
  CXXFLAGS_wasm32-wasi = None
  CXXFLAGS_wasm32_wasi = None
  TARGET_CXXFLAGS = Some("--sysroot=/opt/wasi-sdk/wasi-sysroot")
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("false")
  running: "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "--sysroot=/opt/wasi-sdk/wasi-sysroot" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp"
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/Hashing.h:48:
  cargo:warning=In file included from /usr/include/llvm/Support/ErrorHandling.h:17:
  cargo:warning=In file included from /usr/include/llvm/Support/Compiler.h:21:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/new:89:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/__config:1209:2: error: _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
  cargo:warning=#error _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
  cargo:warning= ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/Hashing.h:48:
  cargo:warning=In file included from /usr/include/llvm/Support/ErrorHandling.h:18:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/string:506:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/string_view:175:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/__string:57:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/algorithm:643:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/memory:668:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/typeinfo:225:16: error: reinterpret_cast from 'std::__type_info_implementations::__non_unique_arm_rtti_bit_impl::__type_name_t' (aka 'unsigned int') to 'size_t' (aka 'unsigned long') is not allowed
  cargo:warning=        return reinterpret_cast<size_t>(__v);
  cargo:warning=               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:19:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
  cargo:warning=In file included from /usr/include/limits.h:124:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
  cargo:warning=In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:4:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/__typedef_time_t.h:5:19: error: typedef redefinition with different types ('long long' vs '__time_t' (aka 'long'))
  cargo:warning=typedef long long time_t;
  cargo:warning=                  ^
  cargo:warning=/usr/include/bits/types/time_t.h:7:18: note: previous definition is here
  cargo:warning=typedef __time_t time_t;
  cargo:warning=                 ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:19:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
  cargo:warning=In file included from /usr/include/limits.h:124:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
  cargo:warning=In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:5:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/__typedef_suseconds_t.h:6:19: error: typedef redefinition with different types ('long long' vs '__suseconds_t' (aka 'long'))
  cargo:warning=typedef long long suseconds_t;
  cargo:warning=                  ^
  cargo:warning=/usr/include/sys/types.h:138:23: note: previous definition is here
  cargo:warning=typedef __suseconds_t suseconds_t;
  cargo:warning=                      ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:19:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
  cargo:warning=In file included from /usr/include/limits.h:124:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
  cargo:warning=In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:269:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/__struct_timeval.h:8:8: error: redefinition of 'timeval'
  cargo:warning=struct timeval {
  cargo:warning=       ^
  cargo:warning=/usr/include/bits/types/struct_timeval.h:8:8: note: previous definition is here
  cargo:warning=struct timeval
  cargo:warning=       ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:19:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/climits:41:
  cargo:warning=In file included from /usr/include/limits.h:124:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/c++/v1/limits.h:57:
  cargo:warning=In file included from /usr/lib/clang/12.0.1/include/limits.h:21:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/limits.h:6:
  cargo:warning=In file included from /opt/wasi-sdk/wasi-sysroot/include/bits/alltypes.h:270:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/__struct_timespec.h:7:8: error: redefinition of 'timespec'
  cargo:warning=struct timespec {
  cargo:warning=       ^
  cargo:warning=/usr/include/bits/types/struct_timespec.h:10:8: note: previous definition is here
  cargo:warning=struct timespec
  cargo:warning=       ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:20:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:321:9: error: no member named 'signbit' in the global namespace; did you mean '__signbit'?
  cargo:warning=using ::signbit;
  cargo:warning=      ~~^
  cargo:warning=/usr/include/bits/mathcalls-helper-functions.h:24:24: note: '__signbit' declared here
  cargo:warning=__MATHDECL_ALIAS (int, __signbit,, (_Mdouble_ __value), signbit)
  cargo:warning=                       ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:20:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:322:9: error: no member named 'fpclassify' in the global namespace; did you mean '__fpclassify'?
  cargo:warning=using ::fpclassify;
  cargo:warning=      ~~^
  cargo:warning=/usr/include/bits/mathcalls-helper-functions.h:20:24: note: '__fpclassify' declared here
  cargo:warning=__MATHDECL_ALIAS (int, __fpclassify,, (_Mdouble_ __value), fpclassify)
  cargo:warning=                       ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:20:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:323:9: error: no member named 'isfinite' in the global namespace
  cargo:warning=using ::isfinite;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:324:9: error: no member named 'isinf' in the global namespace
  cargo:warning=using ::isinf;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:325:9: error: no member named 'isnan' in the global namespace
  cargo:warning=using ::isnan;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:326:9: error: no member named 'isnormal' in the global namespace
  cargo:warning=using ::isnormal;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:327:7: error: no member named 'isgreater' in the global namespace; did you mean '::std::greater'?
  cargo:warning=using ::isgreater;
  cargo:warning=      ^~
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/functional:742:29: note: '::std::greater' declared here
  cargo:warning=struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool>
  cargo:warning=                            ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:20:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:328:7: error: no member named 'isgreaterequal' in the global namespace; did you mean '::std::greater_equal'?
  cargo:warning=using ::isgreaterequal;
  cargo:warning=      ^~
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/functional:771:29: note: '::std::greater_equal' declared here
  cargo:warning=struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool>
  cargo:warning=                            ^
  cargo:warning=In file included from src/linker/linker.cpp:2:
  cargo:warning=In file included from /usr/include/lld/Common/Driver.h:12:
  cargo:warning=In file included from /usr/include/llvm/ADT/ArrayRef.h:14:
  cargo:warning=In file included from /usr/include/llvm/ADT/SmallVector.h:19:
  cargo:warning=In file included from /usr/include/llvm/Support/MathExtras.h:20:
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:329:9: error: no member named 'isless' in the global namespace
  cargo:warning=using ::isless;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:330:9: error: no member named 'islessequal' in the global namespace
  cargo:warning=using ::islessequal;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:331:9: error: no member named 'islessgreater' in the global namespace
  cargo:warning=using ::islessgreater;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:332:9: error: no member named 'isunordered' in the global namespace
  cargo:warning=using ::isunordered;
  cargo:warning=      ~~^
  cargo:warning=/opt/wasi-sdk/wasi-sysroot/include/c++/v1/cmath:333:9: error: no member named 'isunordered' in the global namespace
  cargo:warning=using ::isunordered;
  cargo:warning=      ~~^
  cargo:warning=19 errors generated.
  exit status: 1

  --- stderr


  error occurred: Command "clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=wasm32-wasi" "--sysroot=/opt/wasi-sdk/wasi-sysroot" "-Wno-unused-parameter" "-I/usr/include" "-std=c++14" "-fno-exceptions" "-D_GNU_SOURCE" "-D__STDC_CONSTANT_MACROS" "-D__STDC_FORMAT_MACROS" "-D__STDC_LIMIT_MACROS" "-o" "/home/v1rtl/Coding/forks/solang/target/wasm32-wasi/release/build/solang-711ae689a401e349/out/src/linker/linker.o" "-c" "src/linker/linker.cpp" with args "clang" did not execute successfully (status code exit status: 1).


warning: build failed, waiting for other jobs to finish...
error[E0308]: mismatched types
   --> /home/v1rtl/.cargo/git/checkouts/inkwell-946411d814d2c9f8/d018ee2/src/module.rs:601:95
    |
601 |     pub fn write_bitcode_to_file(&self, file: &File, should_close: bool, unbuffered: bool) -> bool {
    |            ---------------------                                                              ^^^^ expected `bool`, found `()`
    |            |
    |            implicitly returns `()` as its body has no tail or `return` expression

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: build failed

this is wasi-sdk v12.0-1

@seanyoung
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Ok, now the issue is that you are using your systems llvm, so compiled for x86, not an llvm cross-compiled to wasm. That can be done with emscripten (I hope).

@talentlessguy
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@seanyoung do you know how to do that?

I have both emscripten, llvm and wasi-sdk installed. I also have wasm-ld

@seanyoung
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I haven't gotten it working yet. Any help would be appreciated.

@seanyoung
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I think we need this resolved. rustwasm/wasm-pack#654

Then again, others have compiled clang to run in a browser - which means wasi is not necessary.

@seanyoung seanyoung mentioned this issue Mar 27, 2022
Open
@xermicus xermicus added the help wanted Extra attention is needed label Jun 27, 2023
@talentlessguy
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Is this relevant?

https://github.com/rafaelbeckel/test-c-rust-wasm

@seanyoung
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Is this relevant?

https://github.com/rafaelbeckel/test-c-rust-wasm

The problem is linking against llvm libraries, not C in general. Unless I am missing something here

@xermicus
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xermicus commented Oct 3, 2024 •
edited
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FYI we did some experiments using the emscripten target. Compiling LLVM for emscripten was no issue - the only limiting factor seems to be memory usage (in the browser you get max. 3gb)

@talentlessguy
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oh that's really cool

I've tried to compile via cargo build --target wasm32-unknown-emscripten --release but it complains about types. Seems like something's wrong with the mio package

error[E0583]: file not found for module `selector`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/mod.rs:52:5
   |
52 |     mod selector;
   |     ^^^^^^^^^^^^^
   |
   = help: to create the module `selector`, create file "/home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/selector.rs" or "/home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/selector/mod.rs"
   = note: if there is a `mod selector` elsewhere in the crate already, import it with `use crate::...` instead

error[E0583]: file not found for module `waker`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/mod.rs:104:5
    |
104 |     mod waker;
    |     ^^^^^^^^^^
    |
    = help: to create the module `waker`, create file "/home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/waker.rs" or "/home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/waker/mod.rs"
    = note: if there is a `mod waker` elsewhere in the crate already, import it with `use crate::...` instead

error[E0432]: unresolved import `crate::sys::IoSourceState`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/io_source.rs:14:5
   |
14 | use crate::sys::IoSourceState;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `IoSourceState` in `sys`

   Compiling tiny-keccak v2.0.2
   Compiling same-file v1.0.6
error[E0433]: failed to resolve: could not find `Selector` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/poll.rs:321:18
    |
321 |             sys::Selector::new().map(|selector| Poll {
    |                  ^^^^^^^^ could not find `Selector` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:24:14
   |
24 |         sys::event::token(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:38:14
   |
38 |         sys::event::is_readable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:43:14
   |
43 |         sys::event::is_writable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:68:14
   |
68 |         sys::event::is_error(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:99:14
   |
99 |         sys::event::is_read_closed(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:129:14
    |
129 |         sys::event::is_write_closed(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

   Compiling rustc-hex v2.1.0
error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:151:14
    |
151 |         sys::event::is_priority(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:173:14
    |
173 |         sys::event::is_aio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:183:14
    |
183 |         sys::event::is_lio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:221:26
    |
221 |                     sys::event::debug_details(f, self.0)
    |                          ^^^^^ could not find `event` in `sys`

   Compiling cxxbridge-flags v1.0.128
error[E0412]: cannot find type `Selector` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/poll.rs:272:20
    |
272 |     selector: sys::Selector,
    |                    ^^^^^^^^ not found in `sys`

error[E0412]: cannot find type `Selector` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/poll.rs:728:44
    |
728 |     pub(crate) fn selector(&self) -> &sys::Selector {
    |                                            ^^^^^^^^ not found in `sys`

error[E0425]: cannot find value `stream` in this scope
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/sys/unix/tcp.rs:134:58
    |
134 |     unsafe { to_socket_addr(addr.as_ptr()) }.map(|addr| (stream, addr))
    |                                                          ^^^^^^ not found in this scope

error[E0412]: cannot find type `Waker` in module `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/waker.rs:79:17
   |
79 |     inner: sys::Waker,
   |                 ^^^^^ not found in `sys`
   |
help: consider importing one of these structs
   |
1  + use crate::Waker;
   |
1  + use std::task::Waker;
   |
help: if you import `Waker`, refer to it directly
   |
79 -     inner: sys::Waker,
79 +     inner: Waker,
   |

error[E0433]: failed to resolve: could not find `Waker` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/waker.rs:87:14
   |
87 |         sys::Waker::new(registry.selector(), token).map(|inner| Waker { inner })
   |              ^^^^^ could not find `Waker` in `sys`
   |
help: consider importing one of these structs
   |
1  + use crate::Waker;
   |
1  + use std::task::Waker;
   |
help: if you import `Waker`, refer to it directly
   |
87 -         sys::Waker::new(registry.selector(), token).map(|inner| Waker { inner })
87 +         Waker::new(registry.selector(), token).map(|inner| Waker { inner })
   |

error[E0412]: cannot find type `Event` in module `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:18:17
   |
18 |     inner: sys::Event,
   |                 ^^^^^ not found in `sys`
   |
help: consider importing this struct through its public re-export
   |
1  + use crate::event::Event;
   |
help: if you import `Event`, refer to it directly
   |
18 -     inner: sys::Event,
18 +     inner: Event,
   |

error[E0412]: cannot find type `Event` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:187:55
    |
187 |     pub(crate) fn from_sys_event_ref(sys_event: &sys::Event) -> &Event {
    |                                                       ^^^^^ not found in `sys`
    |
help: consider importing this struct through its public re-export
    |
1   + use crate::event::Event;
    |
help: if you import `Event`, refer to it directly
    |
187 -     pub(crate) fn from_sys_event_ref(sys_event: &sys::Event) -> &Event {
187 +     pub(crate) fn from_sys_event_ref(sys_event: &Event) -> &Event {
    |

error[E0412]: cannot find type `Event` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:191:41
    |
191 |             &*(sys_event as *const sys::Event as *const Event)
    |                                         ^^^^^ not found in `sys`
    |
help: consider importing this struct through its public re-export
    |
1   + use crate::event::Event;
    |
help: if you import `Event`, refer to it directly
    |
191 -             &*(sys_event as *const sys::Event as *const Event)
191 +             &*(sys_event as *const Event as *const Event)
    |

error[E0412]: cannot find type `Event` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/event.rs:217:46
    |
217 |             struct EventDetails<'a>(&'a sys::Event);
    |                                              ^^^^^ not found in `sys`
    |
help: consider importing this struct through its public re-export
    |
1   + use crate::event::Event;
    |
help: if you import `Event`, refer to it directly
    |
217 -             struct EventDetails<'a>(&'a sys::Event);
217 +             struct EventDetails<'a>(&'a Event);
    |

error[E0412]: cannot find type `Events` in module `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/events.rs:43:17
   |
43 |     inner: sys::Events,
   |                 ^^^^^^ not found in `sys`
   |
help: consider importing this struct through its public re-export
   |
1  + use crate::Events;
   |
help: if you import `Events`, refer to it directly
   |
43 -     inner: sys::Events,
43 +     inner: Events,
   |

error[E0433]: failed to resolve: could not find `Events` in `sys`
  --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/events.rs:94:25
   |
94 |             inner: sys::Events::with_capacity(capacity),
   |                         ^^^^^^ could not find `Events` in `sys`
   |
help: consider importing this struct through its public re-export
   |
1  + use crate::Events;
   |
help: if you import `Events`, refer to it directly
   |
94 -             inner: sys::Events::with_capacity(capacity),
94 +             inner: Events::with_capacity(capacity),
   |

error[E0412]: cannot find type `Events` in module `sys`
   --> /home/v1rtl/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-1.0.2/src/event/events.rs:189:47
    |
189 |     pub(crate) fn sys(&mut self) -> &mut sys::Events {
    |                                               ^^^^^^ not found in `sys`
    |
help: consider importing this struct through its public re-export
    |
1   + use crate::Events;
    |
help: if you import `Events`, refer to it directly
    |
189 -     pub(crate) fn sys(&mut self) -> &mut sys::Events {
189 +     pub(crate) fn sys(&mut self) -> &mut Events {
    |

   Compiling tinyvec_macros v0.1.1
   Compiling walkdir v2.5.0
   Compiling tinyvec v1.8.0
   Compiling dirs-sys-next v0.1.2
   Compiling codespan-reporting v0.11.1
   Compiling rustversion v1.0.17
   Compiling percent-encoding v2.3.1
Some errors have detailed explanations: E0412, E0425, E0432, E0433, E0583.
For more information about an error, try `rustc --explain E0412`.
error: could not compile `mio` (lib) due to 26 previous errors
warning: build failed, waiting for other jobs to finish..

@xermicus
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xermicus commented Oct 3, 2024

AFAIC mio is a fairly low level crate so to me it's not surprising it causes some issues in emscripten. I guess you can check cargo tree to find out what dependencies rely on them and how to work around that (e.g. use alternatives that work fine in emscripten, gate it behind a feature flag, etc.)

@seanyoung
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I am wondering if the problem is that wasm doesn't have thread support, and there for mio won't work.

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