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Improve compilation error on 32-bit (#2424)

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## Issue Addressed

Closes #1661

## Proposed Changes

Add a dummy package called `target_check` which gets compiled early in the build and fails if the target is 32-bit

## Additional Info

You can test the efficacy of this check with:

```
cross build --release --manifest-path lighthouse/Cargo.toml --target i686-unknown-linux-gnu
```

In which case this compilation error is shown:

```
error: Lighthouse requires a 64-bit CPU and operating system
  --> common/target_check/src/lib.rs:8:1
   |
8  | / assert_cfg!(
9  | |     target_pointer_width = "64",
10 | |     "Lighthouse requires a 64-bit CPU and operating system",
11 | | );
   | |__^
```
This commit is contained in:
Michael Sproul
2021-06-30 04:56:22 +00:00
parent 9461ac2d50
commit 379664a648
5 changed files with 36 additions and 0 deletions
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6
lighthouse/Cargo.toml
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@@ -47,6 +47,7 @@ lazy_static = "1.4.0"
serde_json = "1.0.59"
task_executor = { path = "../common/task_executor" }
malloc_utils = { path = "../common/malloc_utils" }
target_check = { path = "../common/target_check" }
[dev-dependencies]
tempfile = "3.1.0"
@@ -57,3 +58,8 @@ eth2_libp2p = { path = "../beacon_node/eth2_libp2p" }
[[test]]
name = "lighthouse_tests"
path = "tests/main.rs"
# Prevent cargo-udeps from flagging the dummy package `target_check`, which exists only
# to assert properties of the compilation target.
[package.metadata.cargo-udeps.ignore]
normal = ["target_check"]