Support riscv64 for Go

Author: eschnett

src/BuildToolchains.jl

@@ -170,6 +170,8 @@ function meson_cpu_family(p::AbstractPlatform)
         return "aarch64"
     elseif startswith(arch(p)::String, "arm")
         return "arm"
+    elseif arch(p) == "riscv64"
+        return "riscv64"
     end
 end
 

src/Platforms.jl

@@ -160,7 +160,7 @@ const ARCHITECTURE_FLAGS = Dict(
             #"power10" => ["-mcpu=power10", "-mtune=power10"],
         ),
         "riscv64" => OrderedDict(
-            "riscv64" => [],    # TODO
+            "riscv64" => [],
         ),
     ),
     "gcc" => Dict(

src/Runner.jl

@@ -664,6 +664,7 @@ function generate_compiler_wrappers!(platform::AbstractPlatform; bin_path::Abstr
             "x86_64" => "amd64",
             "i686" => "386",
             "powerpc64le" => "ppc64le",
+            "riscv64" => "riscv64",
         )
         return arch_mapping[arch(p)]
     end