Map riscv64 linux to linux64-riscv64 and setup CI (#230)

* Map riscv64 linux to linux64-riscv64

* Add CI for riscv64gc-unknown-linux-gnu

Author: kxxt

.github/workflows/main.yml

@@ -53,6 +53,9 @@ jobs:
         - target: aarch64-unknown-linux-gnu
           rust: stable
           os: ubuntu-latest
+        - target: riscv64gc-unknown-linux-gnu
+          rust: stable
+          os: ubuntu-latest
         - target: x86_64-unknown-linux-musl
           rust: stable
           os: ubuntu-latest

ci/docker/riscv64gc-unknown-linux-gnu/Dockerfile

@@ -0,0 +1,12 @@
+FROM ubuntu:18.04
+
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
+  ca-certificates \
+  make \
+  perl \
+  gcc \
+  libc6-dev \
+  gcc-riscv64-linux-gnu \
+  libc6-dev-riscv64-cross
+ENV CARGO_TARGET_RISCV64GC_UNKNOWN_LINUX_GNU_RUNNER=echo \
+  CARGO_TARGET_RISCV64GC_UNKNOWN_LINUX_GNU_LINKER=riscv64-linux-gnu-gcc

src/lib.rs

@@ -331,9 +331,9 @@ impl Build {
             "powerpc64le-unknown-linux-musl" => "linux-ppc64le",
             "powerpc64le-alpine-linux-musl" => "linux-ppc64le",
             "riscv64gc-unknown-freebsd" => "BSD-riscv64",
-            "riscv64gc-unknown-linux-gnu" => "linux-generic64",
-            "riscv64gc-unknown-linux-musl" => "linux-generic64",
-            "riscv64-alpine-linux-musl" => "linux-generic64",
+            "riscv64gc-unknown-linux-gnu" => "linux64-riscv64",
+            "riscv64gc-unknown-linux-musl" => "linux64-riscv64",
+            "riscv64-alpine-linux-musl" => "linux64-riscv64",
             "riscv64gc-unknown-netbsd" => "BSD-generic64",
             "s390x-unknown-linux-gnu" => "linux64-s390x",
             "sparc64-unknown-netbsd" => "BSD-generic64",