Support riscv64 platform

Artifacts.toml

@@ -1956,6 +1956,94 @@ os = "linux"
     sha256 = "d49106316ef5a4dc8cbce8665e720526a921cbba89dc38be41d53fc65c18007f"
     url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v9.1.0+2/GCCBootstrap-powerpc64le-linux-gnu.v9.1.0.x86_64-linux-musl.unpacked.tar.gz"
 
+[["GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "0e0e172850698ee5784355eebeaf661278cfc489"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.squashfs".download]]
+    sha256 = "a51037a3b4eff64d08f63c48d16a5b873833d83a2085ac365cf11b0918c503cf"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v12.1.0/GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.squashfs.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "55460cf13be2ec9fe829768b49ea5b2ba49954ef"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.unpacked".download]]
+    sha256 = "671879f013264f1627b5bff6ec246fd2806b4bc1ae9db74390df7004e00891d5"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v12.1.0/GCCBootstrap-riscv64-linux-gnu.v12.1.0.x86_64-linux-musl.unpacked.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "83e2aeef1b7ff0abe246d83065877e36f270bb32"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.squashfs".download]]
+    sha256 = "a23f65e83be13b0eed7614b77e484dced1db4192732000edc1d4e52e39e4732e"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v13.2.0/GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.squashfs.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "f62985d28a28baf1017c91dbd9f7fe504a718c12"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.unpacked".download]]
+    sha256 = "fc2b0c57b83c22416cdab285b8e3efaa3c55988d1a771e2ade6308d6b24674f5"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v13.2.0/GCCBootstrap-riscv64-linux-gnu.v13.2.0.x86_64-linux-musl.unpacked.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "0a988108fd945733a2b493ae398b67588abc0e32"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.squashfs".download]]
+    sha256 = "2fe11e0f794df6af2ab39b8e6d1c4efc32cdb792fd045409cdcedd96d643a1c5"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v12.1.0/GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.squashfs.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "a10265906d9a12bbc7a2a9a6ed0a4d67cb6a3ad0"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.unpacked".download]]
+    sha256 = "d958a67682d30ea9e04116db4f463c17f0bf63823e352692d5fe7982da86e220"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v12.1.0/GCCBootstrap-riscv64-linux-musl.v12.1.0.x86_64-linux-musl.unpacked.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "fa8d3617b8a7a823076c43315b19eea746e61ea0"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.squashfs".download]]
+    sha256 = "0b1e047575add41887b4706971bc36d34c235a0561e8e03b03698d76b61c7262"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v13.2.0/GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.squashfs.tar.gz"
+
+[["GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "87d33912a955c60bda8476493049f905092cd1db"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.unpacked".download]]
+    sha256 = "a45d64532488eccb57d65b1dc3fbc5aa65b1204a327f05a0db14d4ff582b2b59"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/GCCBootstrap-v13.2.0/GCCBootstrap-riscv64-linux-musl.v13.2.0.x86_64-linux-musl.unpacked.tar.gz"
+
 [["GCCBootstrap-x86_64-apple-darwin14.v10.2.0.x86_64-linux-musl.squashfs"]]
 arch = "x86_64"
 git-tree-sha1 = "ceb591a6cf8b32224a2a62cf3d8a9572c1c83e62"
@@ -3344,25 +3432,25 @@ os = "linux"
 
 [["LLVMBootstrap.v18.1.7.x86_64-linux-musl.squashfs"]]
 arch = "x86_64"
-git-tree-sha1 = "56e29a15fa1dc3da79b6da7476b826c6a989eda3"
+git-tree-sha1 = "b639d2a33c52a6e5c9c6ba4b837478610801983e"
 lazy = true
 libc = "musl"
 os = "linux"
 
     [["LLVMBootstrap.v18.1.7.x86_64-linux-musl.squashfs".download]]
-    sha256 = "f8268c66097dc4bbd342fbc02c65b1e2cf882e32a06e2d5e93e634f76cf2f8f7"
-    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/LLVMBootstrap-v18.1.7/LLVMBootstrap.v18.1.7.x86_64-linux-musl.squashfs.tar.gz"
+    sha256 = "40481110c912b88bd12599ace28c8022add889a6c02652f319fb43c05bd01b0c"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/LLVMBootstrap-v18.1.7+0/LLVMBootstrap.v18.1.7.x86_64-linux-musl.squashfs.tar.gz"
 
 [["LLVMBootstrap.v18.1.7.x86_64-linux-musl.unpacked"]]
 arch = "x86_64"
-git-tree-sha1 = "ba75276dcd66d7dbc627c61fc86e6d6ea2d4cd31"
+git-tree-sha1 = "1943b45494f48fde6fbbef3f80ea06b1b35d0d86"
 lazy = true
 libc = "musl"
 os = "linux"
 
     [["LLVMBootstrap.v18.1.7.x86_64-linux-musl.unpacked".download]]
-    sha256 = "48619ac29449608f86bab79c798e597753a1a6cc398e818a602cc951b1e270d9"
-    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/LLVMBootstrap-v18.1.7/LLVMBootstrap.v18.1.7.x86_64-linux-musl.unpacked.tar.gz"
+    sha256 = "97691f4fa92ec323131595b61ce90b5fe84e881770a31d479ab955748035baad"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/LLVMBootstrap-v18.1.7+0/LLVMBootstrap.v18.1.7.x86_64-linux-musl.unpacked.tar.gz"
 
 [["LLVMBootstrap.v6.0.1.x86_64-linux-musl.squashfs"]]
 arch = "x86_64"
@@ -4068,6 +4156,112 @@ os = "linux"
     sha256 = "5368cefab3e9ebd704d60f13fa5982d1d8566d9025c47ad6288c0c4f3f02efb7"
     url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.8.10/PlatformSupport-powerpc64le-linux-gnu.v2024.8.10.x86_64-linux-musl.unpacked.tar.gz"
 
+[["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "b176fca4332dbcd60e0f4195feafef712394be6d"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs".download]]
+    sha256 = "6348339e933ca990739e4328a4bcf449cb2944feea590f84ca9b25a6dfba6cb4"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs.tar.gz"
+[["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "b176fca4332dbcd60e0f4195feafef712394be6d"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs".download]]
+    sha256 = "6348339e933ca990739e4328a4bcf449cb2944feea590f84ca9b25a6dfba6cb4"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.squashfs.tar.gz"
+
+[["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "5b9695b4efe229b51926b4c9ffb9a0c891e8ccdd"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked".download]]
+    sha256 = "757fe58ba7561cb61051ef22e8a36f3066fb63b0978cf14ad276313368c43a5f"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked.tar.gz"
+[["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "5b9695b4efe229b51926b4c9ffb9a0c891e8ccdd"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked".download]]
+    sha256 = "757fe58ba7561cb61051ef22e8a36f3066fb63b0978cf14ad276313368c43a5f"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-gnu.v2024.12.21.x86_64-linux-musl.unpacked.tar.gz"
+
+[["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "0e6ee4055c36b0931644528bf89ebfa74da8be6b"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs".download]]
+    sha256 = "e691f0639f64304a78ea93e4bcf4e5e052538b85b5aaa9bcad8760e9732a1edc"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.4.7/PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs.tar.gz"
+[["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "0e6ee4055c36b0931644528bf89ebfa74da8be6b"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs".download]]
+    sha256 = "e691f0639f64304a78ea93e4bcf4e5e052538b85b5aaa9bcad8760e9732a1edc"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.4.7/PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.squashfs.tar.gz"
+
+[["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "5b9695b4efe229b51926b4c9ffb9a0c891e8ccdd"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked".download]]
+    sha256 = "757fe58ba7561cb61051ef22e8a36f3066fb63b0978cf14ad276313368c43a5f"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.4.7/PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked.tar.gz"
+[["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "5b9695b4efe229b51926b4c9ffb9a0c891e8ccdd"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked".download]]
+    sha256 = "757fe58ba7561cb61051ef22e8a36f3066fb63b0978cf14ad276313368c43a5f"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.4.7/PlatformSupport-riscv64-linux-gnu.v2024.4.7.x86_64-linux-musl.unpacked.tar.gz"
+
+[["PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.squashfs"]]
+arch = "x86_64"
+git-tree-sha1 = "72708b43067d2c5b35e46fee91fc1f1164f540af"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.squashfs".download]]
+    sha256 = "a8330a71a91ada1eebad7874911ca51cdba7cef5ad0512495384e44fea564507"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.squashfs.tar.gz"
+
+[["PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.unpacked"]]
+arch = "x86_64"
+git-tree-sha1 = "e15c076bcd4f0ed54f8c7db8bded7da61d6eab30"
+lazy = true
+libc = "musl"
+os = "linux"
+
+    [["PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.unpacked".download]]
+    sha256 = "e9f16e6893bf2815a975ffd37ae12b8f74f81e2da5b2d061126fee62833a2bab"
+    url = "https://github.com/JuliaPackaging/Yggdrasil/releases/download/PlatformSupport-v2024.12.21/PlatformSupport-riscv64-linux-musl.v2024.12.21.x86_64-linux-musl.unpacked.tar.gz"
+
 [["PlatformSupport-x86_64-apple-darwin14.v2021.8.10.x86_64-linux-musl.squashfs"]]
 arch = "x86_64"
 git-tree-sha1 = "bc7f1d08ee0ff50a8665304159d0038d4ece04eb"

Project.toml

@@ -1,7 +1,7 @@
 name = "BinaryBuilderBase"
 uuid = "7f725544-6523-48cd-82d1-3fa08ff4056e"
 authors = ["Elliot Saba <staticfloat@gmail.com>"]
-version = "1.32.0"
+version = "1.33.0"
 
 [deps]
 Bzip2_jll = "6e34b625-4abd-537c-b88f-471c36dfa7a0"

src/BinaryBuilderBase.jl

@@ -27,6 +27,8 @@ export AbstractSource, AbstractDependency, SetupSource, PatchSource,
 
 include("compat.jl")
 
+include("riscv64.jl")
+
 include("ArchiveUtils.jl")
 include("Sources.jl")
 include("Dependencies.jl")

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

@@ -135,7 +135,7 @@ const ARCHITECTURE_FLAGS = Dict(
             "arm1176jzfs" => ["-mcpu=arm1176jzf-s", "-mfpu=vfp", "-mfloat-abi=hard"],
         ),
         "armv7l" => OrderedDict(
-            # Base armv7l architecture, with the most basic of FPU's
+            # Base armv7l architecture, with the most basic of FPUs
             "armv7l"   => ["-march=armv7-a", "-mtune=generic-armv7-a", "-mfpu=vfpv3", "-mfloat-abi=hard"],
             # armv7l plus NEON and vfpv4, (Raspberry Pi 2B+, RK3328, most boards Elliot has access to)
             "neonvfpv4" => ["-mcpu=cortex-a53", "-mfpu=neon-vfpv4", "-mfloat-abi=hard"],
@@ -158,7 +158,10 @@ const ARCHITECTURE_FLAGS = Dict(
             #"power9"  => ["-mcpu=power9", "-mtune=power9"],
             # Eventually, we'll support power10, once we have compilers that support it.
             #"power10" => ["-mcpu=power10", "-mtune=power10"],
-        )
+        ),
+        "riscv64" => OrderedDict(
+            "riscv64" => [],
+        ),
     ),
     "gcc" => Dict(
         "aarch64" => OrderedDict(

src/Rootfs.jl

@@ -431,7 +431,8 @@ the only GCC versions available to be picked from are `4.8.5` and `5.2.0`, it
 will return `4.8.5`, as binaries compiled with that version will run on this
 platform, whereas binaries compiled with `5.2.0` may not.
 """
-function gcc_version(p::AbstractPlatform,GCC_builds::Vector{GCCBuild},
+function gcc_version(p::AbstractPlatform,
+                     GCC_builds::Vector{GCCBuild},
                      compilers::Vector{Symbol}=[:c];
                      llvm_version::Union{Nothing,VersionNumber}=nothing)
     # First, filter by libgfortran version.
@@ -471,6 +472,12 @@ function gcc_version(p::AbstractPlatform,GCC_builds::Vector{GCCBuild},
         GCC_builds = filter(b -> getversion(b) ≥ v"7", GCC_builds)
     end
 
+    # We only have GCC 12 or newer for RISC-V.
+    # (This could be changed down to GCC 7.1.)
+    if arch(p) == "riscv64"
+        GCC_builds = filter(b -> getversion(b) ≥ v"12", GCC_builds)
+    end
+
     # Rust on Windows requires binutils 2.25 (it invokes `ld` with `--high-entropy-va`),
     # which we bundle with GCC 5.
     if :rust in compilers && Sys.iswindows(p)
@@ -525,6 +532,7 @@ function llvm_version(p::AbstractPlatform, LLVM_builds::Vector{LLVMBuild})
         # The target `apple-m1` was introduced in LLVM 13
         LLVM_builds = filter(b -> getversion(b) >= v"13.0", LLVM_builds)
     end
+
     return getversion.(LLVM_builds)
 end
 
@@ -631,9 +639,11 @@ function choose_shards(p::AbstractPlatform;
         )
 
         # We _always_ need Rootfs and PlatformSupport for our target, at least
+        # We don't have old platform support for riscv64. Remove this once all platfor support is aligned in time.
+        ps_build_new = arch(p) == "riscv64" ? max(ps_build, v"2024.12.21") : ps_build
         append!(shards, [
             find_shard("Rootfs", rootfs_build, archive_type),
-            find_shard("PlatformSupport", ps_build, archive_type; target=p)
+            find_shard("PlatformSupport", ps_build_new, archive_type; target=p)
         ])
 
         if :c in compilers
@@ -741,6 +751,8 @@ function supported_platforms(;exclude::Union{Vector{<:Platform},Function}=Return
     # We have experimental support for some platforms, allow easily including them
     if experimental
         append!(standard_platforms, [
+            Platform("riscv64", "linux"),
+            Platform("riscv64", "linux"; libc="musl"),
         ])
     end
     return exclude_platforms!(standard_platforms,exclude)
@@ -773,6 +785,9 @@ function expand_gfortran_versions(platform::AbstractPlatform)
         libgfortran_versions = [v"5"]
     elseif Sys.isfreebsd(platform) && arch(platform) == "aarch64"
         libgfortran_versions = [v"4", v"5"]
+    elseif arch(platform) == "riscv64"
+        # We don't have older GCC versions
+        libgfortran_versions = [v"5"]
     else
         libgfortran_versions = [v"3", v"4", v"5"]
     end
@@ -810,7 +825,7 @@ function expand_cxxstring_abis(platform::AbstractPlatform; skip=Sys.isbsd)
 
     if sanitize(platform) == "memory"
         p = deepcopy(platform)
-        p["cxxstring_abi"] = "cxx11" #Clang only seems to generate cxx11 abi
+        p["cxxstring_abi"] = "cxx11" # Clang only seems to generate cxx11 abi
         return [p]
     end
 

src/Runner.jl

@@ -18,7 +18,7 @@ const default_host_platform = Platform("x86_64", "linux"; libc="musl", cxxstring
 function nbits(p::AbstractPlatform)
     if arch(p) in ("i686", "armv6l", "armv7l")
         return 32
-    elseif arch(p) in ("x86_64", "aarch64", "powerpc64le")
+    elseif arch(p) in ("x86_64", "aarch64", "powerpc64le", "riscv64")
         return 64
     else
         error("Unknown bitwidth for architecture $(arch(p))")
@@ -32,6 +32,8 @@ function proc_family(p::AbstractPlatform)
         return "arm"
     elseif arch(p) == "powerpc64le"
         return "power"
+    elseif arch(p) == "riscv64"
+        return "riscv"
     else
         error("Unknown processor family for architecture $(arch(p))")
     end
@@ -662,6 +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
@@ -1288,6 +1291,8 @@ function platform_envs(platform::AbstractPlatform, src_name::AbstractString;
             mapping["GNU_LIBC_VERSION"] = "glibc 2.19"
         elseif arch(platform) in ("x86_64", "i686",  "powerpc64le")
             mapping["GNU_LIBC_VERSION"] = "glibc 2.17"
+        elseif arch(platform) in ("riscv64",)
+            mapping["GNU_LIBC_VERSION"] = "glibc 2.35"
         end
     end