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no_std fails to build #95

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brenzi opened this issue Sep 21, 2019 · 12 comments
Closed

no_std fails to build #95

brenzi opened this issue Sep 21, 2019 · 12 comments

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@brenzi
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brenzi commented Sep 21, 2019

Reproduce:

build the following minimal crate:
https://github.com/scs/test-no-std/tree/ed25519-dalek

cargo build --no-default-features results in

error: duplicate lang item in crate `std`: `f32_runtime`.
  |
  = note: first defined in crate `sgx_tstd`.

error: duplicate lang item in crate `std`: `f64_runtime`.
  |
  = note: first defined in crate `sgx_tstd`.

error: duplicate lang item in crate `std`: `panic_impl`.
  |
  = note: first defined in crate `sgx_tstd`.

error: duplicate lang item in crate `std`: `begin_panic`.
  |
  = note: first defined in crate `sgx_tstd`.

error: duplicate lang item in crate `std`: `oom`.
  |
  = note: first defined in crate `sgx_tstd`.

error: aborting due to 5 previous errors

error: Could not compile `test_no_std`.
@brenzi brenzi mentioned this issue Sep 21, 2019
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@tarcieri
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You may be running into rust-lang/cargo#5730

@brenzi
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brenzi commented Sep 21, 2019 •
edited
Loading

I have no build-dependencies in my minimal example. Only this:

...

[lib]
name = "test_no_std"
crate-type = ["staticlib"]

[features]
default = []

[target.'cfg(not(target_env = "sgx"))'.dependencies]
sgx_tstd      = { rev = "v1.0.9", git = "https://github.com/baidu/rust-sgx-sdk", features = ["untrusted_fs","net","backtrace"] }


[dependencies.primitives]
git = "https://github.com/scs/substrate-api-client"
package = "substrate-primitives"
branch = "no_std_rstd"
default-features = false

[dependencies.ed25519-dalek]
version = "1.0.0-pre.1"
default-features = false
features = ["u64_backend"]

..and dropping the primitives dependency doesn't change a thing

@tarcieri
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What does your Cargo.lock look like?

@brenzi
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brenzi commented Sep 21, 2019 

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"checksum rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
"checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
"checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
"checksum sgx_alloc 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_backtrace_sys 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_build_helper 0.1.0 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_demangle 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_libc 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_tprotected_fs 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_trts 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_tstd 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_types 1.0.9 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sgx_unwind 0.0.1 (git+https://github.com/baidu/rust-sgx-sdk?rev=v1.0.9)" = "<none>"
"checksum sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7b4d8bfd0e469f417657573d8451fb33d16cfe0989359b93baf3a1ffc639543d"
"checksum subtle 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "01f40907d9ffc762709e4ff3eb4a6f6b41b650375a3f09ac92b641942b7fb082"
"checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

@brenzi
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brenzi commented Sep 21, 2019

just in case this helps: rustup show

Default host: x86_64-unknown-linux-gnu
rustup home:  /home/abrenzikofer/.rustup

installed toolchains
--------------------

stable-x86_64-unknown-linux-gnu
nightly-2019-05-22-x86_64-unknown-linux-gnu
nightly-2019-07-15-x86_64-unknown-linux-gnu
nightly-2019-08-01-x86_64-unknown-linux-gnu (default)
nightly-x86_64-unknown-linux-gnu

installed targets for active toolchain
--------------------------------------

wasm32-unknown-unknown
x86_64-unknown-linux-gnu

active toolchain
----------------

nightly-2019-08-01-x86_64-unknown-linux-gnu (default)
rustc 1.38.0-nightly (8a58268b5 2019-07-31)

@tarcieri
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byteorder seems like a plausible culprit dalek-cryptography/curve25519-dalek#248

@tarcieri
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cc @hdevalence

@brenzi
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brenzi commented Sep 22, 2019

The interaction seems to be complex, because curve25519-dalek builds fine with no_std in my minimal crate:
https://github.com/scs/test-no-std/tree/curve25519-dalek

@brenzi
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brenzi commented Sep 22, 2019

I think I made it work by removing dev-deps and adding two default-features=false in my fork of ed25519-dalek:
https://github.com/scs/ed25519-dalek/tree/no_std_sgx

test it with:
https://github.com/scs/test-no-std/tree/ed25519-dalek

@brenzi brenzi mentioned this issue Sep 22, 2019
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@isislovecruft
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Hi! I similarly suspect you're running into the cargo build-dependencies features issue. However, you'll also want to ensure you're using ed25519-dalek's nightly and u64_backend (or another backend) features if you're trying to build for no_std (and possibly alloc as well). Also 1342e2a may help you, which ended up in version 1.0.0-pre.2.

@burdges
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burdges commented Oct 7, 2019

I think rand_os activates std before 0.2.1, so before rand 0.7. As rand_core 0.4 alone works, your library crate could pass its own tests no_std, but break no_std inside application: w3f/schnorrkel#31 (comment)

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Hi @brenzi! Are you still running into this issue? If so, please feel free to reopen (I'm trying to triage out old bugs that are no longer relevant).

@h4x3rotab h4x3rotab mentioned this issue Feb 13, 2021
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