sr-eth-primitives no_std support error?

[hackfisher]

error: failed to run custom build command for `node-runtime v0.1.0 (/Users/denny/github.com/darwinia-network/darwinia/node/runtime)`

Caused by:
  process didn't exit successfully: `/Users/denny/github.com/darwinia-network/darwinia/target/release/build/node-runtime-f7eaf2f8b8370061/build-script-build` (exit code: 1)
--- stdout
Executing build command: "cargo" "build" "--target=wasm32-unknown-unknown" "--manifest-path=/Users/denny/github.com/darwinia-network/darwinia/target/release/wbuild/node-runtime/Cargo.toml" "--release"

--- stderr
   Compiling wasm-build-runner-impl v1.0.0 (/Users/denny/github.com/darwinia-network/darwinia/target/release/wbuild-runner/node-runtime)
    Finished release [optimized] target(s) in 0.29s
     Running `/Users/denny/github.com/darwinia-network/darwinia/target/release/wbuild-runner/node-runtime/target/release/wasm-build-runner-impl`
   Compiling keccak-hash v0.4.1
   Compiling sr-io v2.0.0 (https://github.com/darwinia-network/substrate.git?branch=darwinia-develop#d2c4b0db)
error[E0152]: duplicate lang item found: `panic_impl`.
   --> /Users/denny/.cargo/git/checkouts/substrate-a7fa553ead635512/d2c4b0d/core/sr-io/src/lib.rs:737:1
    |
737 | / pub fn panic(info: &core::panic::PanicInfo) -> ! {
738 | |     unsafe {
739 | |         let message = rstd::alloc::format!("{}", info);
740 | |         misc::print_utf8(message.as_bytes());
741 | |         core::intrinsics::abort()
742 | |     }
743 | | }
    | |_^
    |
    = note: first defined in crate `std` (which `parity_scale_codec` depends on).

error[E0152]: duplicate lang item found: `oom`.
   --> /Users/denny/.cargo/git/checkouts/substrate-a7fa553ead635512/d2c4b0d/core/sr-io/src/lib.rs:747:1
    |
747 | / pub extern fn oom(_: core::alloc::Layout) -> ! {
748 | |     static OOM_MSG: &str = "Runtime memory exhausted. Aborting";
749 | |
750 | |     unsafe {
...   |
753 | |     }
754 | | }
    | |_^
    |
    = note: first defined in crate `std` (which `parity_scale_codec` depends on).

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0152`.
error: could not compile `sr-io`.

[hackfisher]

Compile branch:

https://github.com/darwinia-network/darwinia/tree/denny_fixing_ethereum_bridge

[AurevoirXavier]

Yes. I mark them as FIXME in xavier-no_std-support-check.

[hackfisher]

➜  sr-eth-primitives git:(denny_fixing_ethereum_bridge) ✗ cargo check --target thumbv7m-none-eabi
warning: /Users/denny/github.com/darwinia-network/darwinia/core/sr-eth-primitives/Cargo.toml: unused manifest key: dependencies.ethereum-types.default-feature
warning: /Users/denny/github.com/darwinia-network/darwinia/core/sr-eth-primitives/Cargo.toml: unused manifest key: dependencies.primitive-types.default-feature
    Checking rustc-hex v2.0.1
    Checking bitvec v0.15.2
    Checking byte-slice-cast v0.3.4
    Checking sr-std v2.0.0 (https://github.com/darwinia-network/substrate.git?branch=darwinia-develop#d2c4b0db)
    Checking c2-chacha v0.2.3
   Compiling crunchy v0.2.2
   Compiling tiny-keccak v2.0.1
    Checking getrandom v0.1.13
    Checking byteorder v1.3.2
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `sr-std`.
warning: build failed, waiting for other jobs to finish...
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `rustc-hex`.
warning: build failed, waiting for other jobs to finish...
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `byte-slice-cast`.
warning: build failed, waiting for other jobs to finish...
error: could not compile `c2-chacha`.
warning: build failed, waiting for other jobs to finish...
error: could not compile `crunchy`.
warning: build failed, waiting for other jobs to finish...
error[E0463]: can't find crate for `std`
 --> /Users/denny/.cargo/registry/src/github.com-1ecc6299db9ec823/getrandom-0.1.13/src/error_impls.rs:8:1
  |
8 | extern crate std;
  | ^^^^^^^^^^^^^^^^^ can't find crate
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `getrandom`.
warning: build failed, waiting for other jobs to finish...
error: could not compile `byteorder`.
warning: build failed, waiting for other jobs to finish...
error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7m-none-eabi` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `bitvec`.

To learn more, run the command again with --verbose.

[AurevoirXavier]

why use thumbv7m-none-eabi toolchain?

[hackfisher]

why use thumbv7m-none-eabi toolchain?

It seems that wasm32-unknown-unknown can also support std (from the doc, not sure):

https://users.rust-lang.org/t/solved-how-to-troubleshoot-why-and-prevent-cargo-rustc-links-in-crate-std-when-no-std-is-specified/25233/3

https://forge.rust-lang.org/release/platform-support.html

[hackfisher]

I made it get compiled under target wasm32-unknown-unknown in branch: denny_fixing_ethereum_bridge,

But this issue still occurs.

[sekisamu]

yes, wasm32-unknown-unknown also supports std. @hackfisher could you merge your branch denny_fixing_ethereum_bridge into develop?

[hackfisher]

yes, wasm32-unknown-unknown also supports std. @hackfisher could you merge your branch denny_fixing_ethereum_bridge into develop?

#118