Run tests for riscv64

.github/workflows/main.yml

@@ -50,10 +50,12 @@ jobs:
           - os: ubuntu-latest
             env:
               TARGET_TRIPLE: aarch64-unknown-linux-gnu
-          # s390x requires QEMU 6.1 or greater, we could build it from source, but ubuntu 22.04 comes with 6.2 by default
           - os: ubuntu-latest
             env:
               TARGET_TRIPLE: s390x-unknown-linux-gnu
+          - os: ubuntu-latest
+            env:
+              TARGET_TRIPLE: riscv64gc-unknown-linux-gnu
           - os: windows-latest
             env:
               TARGET_TRIPLE: x86_64-pc-windows-msvc
@@ -92,6 +94,12 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y gcc-s390x-linux-gnu qemu-user
 
+    - name: Install riscv64gc toolchain and qemu
+      if: matrix.env.TARGET_TRIPLE == 'riscv64gc-unknown-linux-gnu'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y gcc-riscv64-linux-gnu qemu-user
+
     - name: Prepare dependencies
       run: ./y.sh prepare
 

build_system/utils.rs

@@ -42,6 +42,16 @@ pub(crate) fn set_cross_linker_and_runner(&mut self) {
                     "/usr/s390x-linux-gnu".to_owned(),
                 ];
             }
+            "riscv64gc-unknown-linux-gnu" => {
+                // We are cross-compiling for riscv64. Use the correct linker and run tests in qemu.
+                self.rustflags.push("-Clinker=riscv64-linux-gnu-gcc".to_owned());
+                self.rustdocflags.push("-Clinker=riscv64-linux-gnu-gcc".to_owned());
+                self.runner = vec![
+                    "qemu-riscv64".to_owned(),
+                    "-L".to_owned(),
+                    "/usr/riscv64-linux-gnu".to_owned(),
+                ];
+            }
             "x86_64-pc-windows-gnu" => {
                 // We are cross-compiling for Windows. Run tests in wine.
                 self.runner = vec!["wine".to_owned()];