[BUG] blst does not build using cargo risczero test

[SchmErik]

Bug Report

Running cargo risczero test in the blst crate's bindings/rust directory does not work.

Steps to Reproduce

1. install cargo risczero with the experimental feature by running cargo install --force --path risc0/cargo-risczero -F experimental
2. clone BLST by running https://github.com/supranational/blst.git
3. add this change to patch getrandom

diff --git a/bindings/rust/Cargo.toml b/bindings/rust/Cargo.toml
index ce6ba53..d6ecfbe 100644
--- a/bindings/rust/Cargo.toml
+++ b/bindings/rust/Cargo.toml
@@ -50,6 +50,9 @@ serde = { version = "1.0.152", optional = true }
 
 [target.'cfg(not(any(target_arch="wasm32", target_os="none", target_os="unknown", target_os="uefi")))'.dependencies]
 threadpool = "^1.8.1"
+[target.'cfg(all(target_os = "zkvm", target_arch = "riscv32"))'.dependencies]
+getrandom = { version = "0.2", features = ["custom"] }
+
 
 [dev-dependencies]
 rand = "0.8"

4. run cargo risczero test from the directory bindings/rust in the blst directory.
5. The following warning appears in the terminal output:

warning: blst@0.3.11: warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: archive library: /Users/erik/blst/bindings/rust/target/riscv32im-risc0-zkvm-elf/debug/build/blst-66bf3377eb4d0726/out/libblst.a the table of contents is empty (no object file members in the library define global symbols)

followed by linker errors like these:

  = note: rust-lld: error: /Users/erik/blst/bindings/rust/target/riscv32im-risc0-zkvm-elf/debug/build/blst-66bf3377eb4d0726/out/libblst.a(9cfc24e6b3ae334c-server.o):(.debug_rnglists+0x11): unknown relocation (60) against symbol .LFE0
          rust-lld: error: /Users/erik/blst/bindings/rust/target/riscv32im-risc0-zkvm-elf/debug/build/blst-66bf3377eb4d0726/out/libblst.a(9cfc24e6b3ae334c-server.o):(.debug_rnglists+0x11): unknown relocation (61) against symbol .LFB0
          rust-lld: error: /Users/erik/blst/bindings/rust/target/riscv32im-risc0-zkvm-elf/debug/build/blst-66bf3377eb4d0726/out/libblst.a(9cfc24e6b3ae334c-server.o):(.debug_rnglists+0x17): unknown relocation (60) against symbol .LFE1

Expected behavior

I would expect cargo risczero test compile and link successfully and start running tests

Your Environment

• risc0-zkvm version: 0.21
• Rust version: 1.77.2
• Platform/OS: macOS

Additional context

Without the change to the Cargo.toml the compilation will fail with an error that originates from the getrandom crate. I'll file a separate issue for this.

[linear]

ZKVM-422 [BUG] `blst` does not build using `cargo risczero test`