Merge pull request #28333 from gounthar/feat/riscv64-cross

ci: add riscv64 cross-compilation to Cirrus CI alt-arch matrix

.cirrus.yml

@@ -260,6 +260,8 @@ alt_build_task:
             ALT_NAME: 'Alt Arch. MIPS Cross'
       - env:
             ALT_NAME: 'Alt Arch. MIPS64 Cross'
+      - env:
+            ALT_NAME: 'Alt Arch. RISCV64 Cross'
       - env:
             ALT_NAME: 'Alt Arch. Other Cross'
     # This task cannot make use of the shared repo.tar.zst artifact.

contrib/cirrus/runner.sh

@@ -304,6 +304,9 @@ function _run_altbuild() {
                 mips64le)
             _build_altbuild_archs "${arches[@]}"
             ;;
+        Alt*RISCV64*Cross)
+            _build_altbuild_archs "riscv64"
+            ;;
         *)
             die "Unknown/Unsupported \$$ALT_NAME '$ALT_NAME'"
     esac