Compiling tx_ibc.wasm on the ledger failed on M1 Mac

[yito88]

When starting the ledger, the pre-compilation for tx_ibc.wasm built on my local failed.

The application panicked (crashed).
Message:  called `Result::unwrap()` on an `Err` value: ImpossibleRelocation(Dynamic(DynamicLabel(0)))
Location: /Users/yuji/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wasmer-compiler-singlepass-2.3.0/src/machine_arm64.rs:2064

It happened from v0.21.1. v0.21.0 didn't happen. Upgrading ibc-rs might cause this issue.

Chip: Apple M1 Pro
OS: macOS 13.2.1

wasm-opt version 114 (version_114)

[yito88]

I found a workaround.

In my investigation, the commit caused this issue.
It requires std in ibc-rs to receive a packet made by CosmosSDK. (So, the workaround can be applied only for testing between Namada chains.)
And, I changed RUSTFLAGS in the wasm building by referring to near/nearcore#9143.

But I'm not sure why RUSTFLAGS also needs to be changed. If std is the root cause, the RUSTFLAGS change is not needed.

Workaround:

diff --git a/core/Cargo.toml b/core/Cargo.toml
index 9401b7c3c..74d80cdfd 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -39,6 +39,7 @@ abciplus = [
 ]
 
 ibc-mocks = [
   "ibc/mocks",
+  "ibc/std",
 ]
 
@@ -72,7 +73,7 @@ ferveo = {optional = true, git = "https://github.com/anoma/ferveo", rev = "e5abd
 ferveo-common = {git = "https://github.com/anoma/ferveo", rev = "e5abd0acc938da90140351a65a26472eb495ce4d"}
 tpke = {package = "group-threshold-cryptography", optional = true, git = "https://github.com/anoma/ferveo", rev = "e5abd0acc938da90140351a65a26472eb495ce4d"}
 # TODO using the same version of tendermint-rs as we do here.
-ibc = { git = "https://github.com/heliaxdev/cosmos-ibc-rs.git", rev = "38a827d3901e590b2935ee5b6b81b4d67c399560", features = ["serde"], optional = true}
+ibc = { git = "https://github.com/heliaxdev/cosmos-ibc-rs.git", rev = "38a827d3901e590b2935ee5b6b81b4d67c399560", default-features = false, features = ["serde"], optional = true}
 ibc-proto = {git = "https://github.com/heliaxdev/ibc-proto-rs.git", rev = "31892ee743b2af017d5629b2af419ee20b6100c7", default-features = false, optional = true}
 ics23.workspace = true
 impl-num-traits = "0.1.2"
diff --git a/wasm/wasm_source/Makefile b/wasm/wasm_source/Makefile
index a88065355..dee19b9b7 100644
--- a/wasm/wasm_source/Makefile
+++ b/wasm/wasm_source/Makefile
@@ -56,7 +56,7 @@ fmt-check:
 # Build a selected wasm
 # Linker flag "-s" for stripping (https://github.com/rust-lang/cargo/issues/3483#issuecomment-431209957)
 $(wasms): %:
-	RUSTFLAGS='-C link-arg=-s' $(cargo) build --release --target wasm32-unknown-unknown --target-dir 'target' --features $@ && \
+	RUSTFLAGS='-C link-arg=-s -C target-cpu=mvp' $(cargo) build --release --target wasm32-unknown-unknown --target-dir 'target' --features $@ && \
 	cp "./target/wasm32-unknown-unknown/release/namada_wasm.wasm" ../[email protected]
 
 # Build a selected wasm in debug mode

[yito88]

The workaround didn't work with 0.22.0