From de26ad1a2a30a65d74b9bf433fc805e261c6ed53 Mon Sep 17 00:00:00 2001
From: Amanieu d'Antras <amanieu@gmail.com>
Date: Mon, 26 Feb 2024 13:13:43 +0000
Subject: [PATCH 1/3] Promote riscv64gc-unknown-linux-musl to tier 2
---
.../docker/host-x86_64/dist-various-2/Dockerfile | 14 ++++++++++++--
src/tools/build-manifest/src/main.rs | 1 +
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/src/ci/docker/host-x86_64/dist-various-2/Dockerfile b/src/ci/docker/host-x86_64/dist-various-2/Dockerfile
index 2621e9a603185..1b98d54169338 100644
--- a/src/ci/docker/host-x86_64/dist-various-2/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-various-2/Dockerfile
@@ -24,7 +24,8 @@ RUN apt-get update && apt-get build-dep -y clang llvm && apt-get install -y --no
# Needed for apt-key to work:
dirmngr \
gpg-agent \
- g++-9-arm-linux-gnueabi
+ g++-9-arm-linux-gnueabi \
+ g++-11-riscv64-linux-gnu
RUN apt-key adv --batch --yes --keyserver keyserver.ubuntu.com --recv-keys 74DA7924C5513486
RUN add-apt-repository -y 'deb https://apt.dilos.org/dilos dilos2 main'
@@ -73,6 +74,10 @@ RUN env \
CC=arm-linux-gnueabi-gcc-9 CFLAGS="-march=armv7-a" \
CXX=arm-linux-gnueabi-g++-9 CXXFLAGS="-march=armv7-a" \
bash musl.sh armv7 && \
+ env \
+ CC=riscv64-linux-gnu-gcc-11 \
+ CXX=riscv64-linux-gnu-g++-11 \
+ bash musl.sh riscv64gc && \
rm -rf /build/*
WORKDIR /tmp
@@ -125,6 +130,7 @@ ENV TARGETS=$TARGETS,x86_64-unknown-none
ENV TARGETS=$TARGETS,aarch64-unknown-uefi
ENV TARGETS=$TARGETS,i686-unknown-uefi
ENV TARGETS=$TARGETS,x86_64-unknown-uefi
+ENV TARGETS=$TARGETS,riscv64gc-unknown-linux-musl
# As per https://bugs.launchpad.net/ubuntu/+source/gcc-defaults/+bug/1300211
# we need asm in the search path for gcc-9 (for gnux32) but not in the search path of the
@@ -132,7 +138,11 @@ ENV TARGETS=$TARGETS,x86_64-unknown-uefi
# Luckily one of the folders is /usr/local/include so symlink /usr/include/x86_64-linux-gnu/asm there
RUN ln -s /usr/include/x86_64-linux-gnu/asm /usr/local/include/asm
+# musl-gcc can't find libgcc_s.so.1 since it doesn't use the standard search paths.
+RUN ln -s /usr/riscv64-linux-gnu/lib/libgcc_s.so.1 /usr/lib/gcc-cross/riscv64-linux-gnu/11/
+
ENV RUST_CONFIGURE_ARGS --enable-extended --enable-lld --enable-llvm-bitcode-linker --disable-docs \
- --musl-root-armv7=/musl-armv7
+ --musl-root-armv7=/musl-armv7 \
+ --musl-root-riscv64gc=/musl-riscv64gc
ENV SCRIPT python3 ../x.py dist --host='' --target $TARGETS
diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs
index ff475b9571b87..2b263f848e89e 100644
--- a/src/tools/build-manifest/src/main.rs
+++ b/src/tools/build-manifest/src/main.rs
@@ -141,6 +141,7 @@ static TARGETS: &[&str] = &[
"riscv64gc-unknown-hermit",
"riscv64gc-unknown-none-elf",
"riscv64gc-unknown-linux-gnu",
+ "riscv64gc-unknown-linux-musl",
"s390x-unknown-linux-gnu",
"sparc64-unknown-linux-gnu",
"sparcv9-sun-solaris",
From a937a3b5a164d267202c2226995d717651991f92 Mon Sep 17 00:00:00 2001
From: Amanieu d'Antras <amanieu@gmail.com>
Date: Sat, 22 Jun 2024 16:42:05 +0200
Subject: [PATCH 2/3] Make riscv64gc-unknown-linux-musl dynamically linked by
default
---
.../src/spec/targets/riscv64gc_unknown_linux_musl.rs | 1 +
1 file changed, 1 insertion(+)
diff --git a/compiler/rustc_target/src/spec/targets/riscv64gc_unknown_linux_musl.rs b/compiler/rustc_target/src/spec/targets/riscv64gc_unknown_linux_musl.rs
index 3e575fdd528de..8b40132986867 100644
--- a/compiler/rustc_target/src/spec/targets/riscv64gc_unknown_linux_musl.rs
+++ b/compiler/rustc_target/src/spec/targets/riscv64gc_unknown_linux_musl.rs
@@ -21,6 +21,7 @@ pub fn target() -> Target {
llvm_abiname: "lp64d".into(),
max_atomic_width: Some(64),
supported_split_debuginfo: Cow::Borrowed(&[SplitDebuginfo::Off]),
+ crt_static_default: false,
..base::linux_musl::opts()
},
}
From 9963a6c400f7c5aa762e0b5419df756432f2e83b Mon Sep 17 00:00:00 2001
From: Amanieu d'Antras <amanieu@gmail.com>
Date: Sat, 22 Jun 2024 17:04:00 +0200
Subject: [PATCH 3/3] Add platform support document for
riscv64gc-unknown-linux-musl
---
src/doc/rustc/src/SUMMARY.md | 1 +
src/doc/rustc/src/platform-support.md | 2 +-
.../riscv64gc-unknown-linux-musl.md | 47 +++++++++++++++++++
3 files changed, 49 insertions(+), 1 deletion(-)
create mode 100644 src/doc/rustc/src/platform-support/riscv64gc-unknown-linux-musl.md
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index d5141591b97e4..467fd6f43e48f 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -66,6 +66,7 @@
- [riscv32imac-unknown-xous-elf](platform-support/riscv32imac-unknown-xous-elf.md)
- [riscv32*-unknown-none-elf](platform-support/riscv32-unknown-none-elf.md)
- [riscv64gc-unknown-linux-gnu](platform-support/riscv64gc-unknown-linux-gnu.md)
+ - [riscv64gc-unknown-linux-musl](platform-support/riscv64gc-unknown-linux-musl.md)
- [sparc-unknown-none-elf](./platform-support/sparc-unknown-none-elf.md)
- [*-pc-windows-gnullvm](platform-support/pc-windows-gnullvm.md)
- [\*-nto-qnx-\*](platform-support/nto-qnx.md)
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index f3b49a65aad28..7fd1808a1f026 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -98,6 +98,7 @@ target | notes
`powerpc64-unknown-linux-gnu` | PPC64 Linux (kernel 3.2, glibc 2.17)
`powerpc64le-unknown-linux-gnu` | PPC64LE Linux (kernel 3.10, glibc 2.17)
[`riscv64gc-unknown-linux-gnu`](platform-support/riscv64gc-unknown-linux-gnu.md) | RISC-V Linux (kernel 4.20, glibc 2.29)
+[`riscv64gc-unknown-linux-musl`](platform-support/riscv64gc-unknown-linux-musl.md) | RISC-V Linux (kernel 4.20, musl 1.2.3)
`s390x-unknown-linux-gnu` | S390x Linux (kernel 3.2, glibc 2.17)
`x86_64-unknown-freebsd` | 64-bit FreeBSD
`x86_64-unknown-illumos` | illumos
@@ -354,7 +355,6 @@ target | std | host | notes
[`riscv64gc-unknown-hermit`](platform-support/hermit.md) | ✓ | | RISC-V Hermit
`riscv64gc-unknown-freebsd` | | | RISC-V FreeBSD
`riscv64gc-unknown-fuchsia` | | | RISC-V Fuchsia
-`riscv64gc-unknown-linux-musl` | | | RISC-V Linux (kernel 4.20, musl 1.2.3)
[`riscv64gc-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | RISC-V NetBSD
[`riscv64gc-unknown-openbsd`](platform-support/openbsd.md) | ✓ | ✓ | OpenBSD/riscv64
[`riscv64-linux-android`](platform-support/android.md) | | | RISC-V 64-bit Android
diff --git a/src/doc/rustc/src/platform-support/riscv64gc-unknown-linux-musl.md b/src/doc/rustc/src/platform-support/riscv64gc-unknown-linux-musl.md
new file mode 100644
index 0000000000000..5b3dc68303803
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/riscv64gc-unknown-linux-musl.md
@@ -0,0 +1,47 @@
+# riscv64gc-unknown-linux-musl
+
+**Tier: 2**
+
+Target for RISC-V Linux programs using musl libc.
+
+## Target maintainers
+
+- [@Amanieu](https://github.com/Amanieu)
+- [@kraj](https://github.com/kraj)
+
+## Requirements
+
+Building the target itself requires a RISC-V compiler that is supported by `cc-rs`.
+
+## Building the target
+
+The target can be built by enabling it for a `rustc` build.
+
+```toml
+[build]
+target = ["riscv64gc-unknown-linux-musl"]
+```
+
+Make sure your C compiler is included in `$PATH`, then add it to the `config.toml`:
+
+```toml
+[target.riscv64gc-unknown-linux-musl]
+cc = "riscv64-linux-gnu-gcc"
+cxx = "riscv64-linux-gnu-g++"
+ar = "riscv64-linux-gnu-ar"
+linker = "riscv64-linux-gnu-gcc"
+```
+
+## Building Rust programs
+
+This target are distributed through `rustup`, and otherwise require no
+special configuration.
+
+## Cross-compilation
+
+This target can be cross-compiled from any host.
+
+## Testing
+
+This target can be tested as normal with `x.py` on a RISC-V host or via QEMU
+emulation.