Try #1028: --target mips*musl*

.changes/1028.json

@@ -0,0 +1,37 @@
+[
+    {
+        "description": "link to libgcc for armv5te-unknown-linux-musleabi.",
+        "type": "fixed"
+    },
+    {
+        "description": "add C++ support for FreeBSD targets.",
+        "type": "added"
+    },
+    {
+        "description": "test dynamic library support for Android targets in CI.",
+        "type": "internal"
+    },
+    {
+        "description": "test partial C++ support for mips64el-unknown-linux-muslabi64 in CI.",
+        "type": "internal"
+    },
+    {
+        "description": "convert mips64el-unknown-linux-muslabi64 to a hard-float toolchain to match the rust target.",
+        "type": "changed",
+        "breaking": true
+    },
+    {
+        "description": "convert mips64el-unknown-linux-muslabi64 to use the mips64r2 architecture, identical to the rust target.",
+        "type": "changed",
+        "breaking": true
+    },
+    {
+        "description": "document whether MIPS musl targets are hard or soft float.",
+        "type": "internal"
+    },
+    {
+        "description": "convert mips-unknown-linux-musl and mipsel-unknown-linux-musl to use the mips32r2 architecture, identical to the rust targets.",
+        "type": "changed",
+        "breaking": true
+    },
+]

docker/Dockerfile.armv5te-unknown-linux-musleabi

@@ -26,7 +26,9 @@ RUN /musl-symlink.sh $CROSS_MUSL_SYSROOT arm
 
 COPY qemu-runner base-runner.sh /
 
-ENV CARGO_TARGET_ARMV5TE_UNKNOWN_LINUX_MUSLEABI_LINKER=arm-linux-musleabi-gcc \
+COPY arm-linux-musleabi-gcc.sh /usr/bin/
+
+ENV CARGO_TARGET_ARMV5TE_UNKNOWN_LINUX_MUSLEABI_LINKER=arm-linux-musleabi-gcc.sh \
     CARGO_TARGET_ARMV5TE_UNKNOWN_LINUX_MUSLEABI_RUNNER="/qemu-runner arm" \
     CC_armv5te_unknown_linux_musleabi=arm-linux-musleabi-gcc \
     CXX_armv5te_unknown_linux_musleabi=arm-linux-musleabi-g++ \

docker/Dockerfile.i686-unknown-freebsd

@@ -19,7 +19,9 @@ COPY freebsd-install.sh /
 COPY freebsd-extras.sh /
 RUN /freebsd-extras.sh
 
-ENV CARGO_TARGET_I686_UNKNOWN_FREEBSD_LINKER=i686-unknown-freebsd12-gcc \
+COPY i686-unknown-freebsd12-gcc.sh /usr/bin
+
+ENV CARGO_TARGET_I686_UNKNOWN_FREEBSD_LINKER=i686-unknown-freebsd12-gcc.sh \
     CC_i686_unknown_freebsd=i686-unknown-freebsd12-gcc \
     CXX_i686_unknown_freebsd=i686-unknown-freebsd12-g++ \
     BINDGEN_EXTRA_CLANG_ARGS_i686_unknown_freebsd="--sysroot=/usr/local/i686-unknown-freebsd12" \

docker/Dockerfile.mips-unknown-linux-musl

@@ -13,6 +13,8 @@ RUN /xargo.sh
 COPY qemu.sh /
 RUN /qemu.sh mips
 
+# this is a soft-float target for the mips32r2 architecture
+# https://github.com/rust-lang/rust/blob/75d3027fb5ce1af6712e4503c9574802212101bd/compiler/rustc_target/src/spec/mips_unknown_linux_musl.rs#L7
 COPY musl.sh /
 RUN /musl.sh \
     TARGET=mips-linux-muslsf \

docker/Dockerfile.mips64-unknown-linux-muslabi64

@@ -12,6 +12,8 @@ RUN /xargo.sh
 COPY qemu.sh /
 RUN /qemu.sh mips64
 
+# this is a hard-float target for the mips64r2 architecture
+# https://github.com/rust-lang/rust/blob/75d3027fb5ce1af6712e4503c9574802212101bd/compiler/rustc_target/src/spec/mips64_unknown_linux_muslabi64.rs#L7
 COPY musl.sh /
 RUN /musl.sh \
     TARGET=mips64-linux-musl \

docker/Dockerfile.mips64el-unknown-linux-muslabi64

@@ -12,21 +12,29 @@ RUN /xargo.sh
 COPY qemu.sh /
 RUN /qemu.sh mips64el
 
+# this is a hard-float target for the mips64r2 architecture
+# https://github.com/rust-lang/rust/blob/75d3027fb5ce1af6712e4503c9574802212101bd/compiler/rustc_target/src/spec/mips64el_unknown_linux_muslabi64.rs#L6
 COPY musl.sh /
 RUN /musl.sh \
-    TARGET=mips64el-linux-muslsf \
-    "COMMON_CONFIG += -with-arch=mips64"
+    TARGET=mips64el-linux-musl \
+    "COMMON_CONFIG += -with-arch=mips64r2"
 
-ENV CROSS_MUSL_SYSROOT=/usr/local/mips64el-linux-muslsf
+ENV CROSS_MUSL_SYSROOT=/usr/local/mips64el-linux-musl
 COPY musl-symlink.sh /
-RUN /musl-symlink.sh $CROSS_MUSL_SYSROOT mips64el-sf
+RUN /musl-symlink.sh $CROSS_MUSL_SYSROOT mips64el
+RUN mkdir -p $CROSS_MUSL_SYSROOT/usr/lib64
+# needed for the C/C++ runners
+RUN ln -s $CROSS_MUSL_SYSROOT/usr/lib/libc.so $CROSS_MUSL_SYSROOT/usr/lib64/libc.so
+RUN ln -s $CROSS_MUSL_SYSROOT/usr/lib/libc.so.1 $CROSS_MUSL_SYSROOT/usr/lib64/libc.so.1
+
+COPY mips64el-linux-musl-gcc.sh /usr/bin/
 
 COPY qemu-runner base-runner.sh /
 
-ENV CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_MUSLABI64_LINKER=mips64el-linux-muslsf-gcc \
+ENV CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_MUSLABI64_LINKER=mips64el-linux-musl-gcc.sh \
     CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_MUSLABI64_RUNNER="/qemu-runner mips64el" \
-    CC_mips64el_unknown_linux_muslabi64=mips64el-linux-muslsf-gcc \
-    CXX_mips64el_unknown_linux_muslabi64=mips64el-linux-muslsf-g++ \
+    CC_mips64el_unknown_linux_muslabi64=mips64el-linux-musl-gcc \
+    CXX_mips64el_unknown_linux_muslabi64=mips64el-linux-musl-g++ \
     BINDGEN_EXTRA_CLANG_ARGS_mips64el_unknown_linux_muslabi64="--sysroot=$CROSS_MUSL_SYSROOT" \
     QEMU_LD_PREFIX=$CROSS_MUSL_SYSROOT \
     RUST_TEST_THREADS=1

docker/Dockerfile.mipsel-unknown-linux-musl

@@ -13,10 +13,12 @@ RUN /xargo.sh
 COPY qemu.sh /
 RUN /qemu.sh mipsel
 
+# this is a soft-float target for the mips32r2 architecture
+# https://github.com/rust-lang/rust/blob/75d3027fb5ce1af6712e4503c9574802212101bd/compiler/rustc_target/src/spec/mipsel_unknown_linux_musl.rs#L6
 COPY musl.sh /
 RUN /musl.sh \
     TARGET=mipsel-linux-muslsf \
-    "COMMON_CONFIG += -with-arch=mips32"
+    "COMMON_CONFIG += -with-arch=mips32r2"
 
 ENV CROSS_MUSL_SYSROOT=/usr/local/mipsel-linux-muslsf
 COPY musl-symlink.sh /

docker/Dockerfile.x86_64-unknown-freebsd

@@ -19,7 +19,9 @@ COPY freebsd-install.sh /
 COPY freebsd-extras.sh /
 RUN /freebsd-extras.sh
 
-ENV CARGO_TARGET_X86_64_UNKNOWN_FREEBSD_LINKER=x86_64-unknown-freebsd12-gcc \
+COPY x86_64-unknown-freebsd12-gcc.sh /usr/bin
+
+ENV CARGO_TARGET_X86_64_UNKNOWN_FREEBSD_LINKER=x86_64-unknown-freebsd12-gcc.sh \
     CC_x86_64_unknown_freebsd=x86_64-unknown-freebsd12-gcc \
     CXX_x86_64_unknown_freebsd=x86_64-unknown-freebsd12-g++ \
     BINDGEN_EXTRA_CLANG_ARGS_x86_64_unknown_freebsd="--sysroot=/usr/local/x86_64-unknown-freebsd12" \

docker/i686-unknown-freebsd12-gcc.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# the freebsd images need libstdc++ to be linked as well
+# otherwise, we get `undefined reference to `std::ios_base::Init::Init()'`
+
+set -x
+set -euo pipefail
+
+main() {
+    if [[ $# -eq 0 ]]; then
+        exec i686-unknown-freebsd12-gcc "${@}"
+    else
+        exec i686-unknown-freebsd12-gcc "${@}" -lc++ -lstdc++
+    fi
+}
+
+main "${@}"

docker/mips64el-linux-musl-gcc.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# this linker wrapper works around the missing soft-fp routine __trunctfsf2
+# this affects rust versions with compiler-builtins <= 0.1.77,
+# which has not yet been merged into stable. this requires the `-lgcc`
+# linker flag to provide the missing builtin.
+# https://github.com/rust-lang/compiler-builtins/pull/483
+
+set -x
+set -euo pipefail
+
+main() {
+    if [[ $# -eq 0 ]]; then
+        exec mips64el-linux-musl-gcc "${@}"
+    else
+        exec mips64el-linux-musl-gcc "${@}" -lgcc -static-libgcc
+    fi
+}
+
+main "${@}"

docker/x86_64-unknown-freebsd12-gcc.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# the freebsd images need libstdc++ to be linked as well
+# otherwise, we get `undefined reference to `std::ios_base::Init::Init()'`
+
+set -x
+set -euo pipefail
+
+main() {
+    if [[ $# -eq 0 ]]; then
+        exec x86_64-unknown-freebsd12-gcc "${@}"
+    else
+        exec x86_64-unknown-freebsd12-gcc "${@}" -lc++ -lstdc++
+    fi
+}
+
+main "${@}"

targets.toml

@@ -157,6 +157,8 @@ run = true
 [[target]]
 target = "mips64el-unknown-linux-muslabi64"
 os = "ubuntu-latest"
+# FIXME: Lacking partial C++ support due to missing compiler builtins.
+cpp = true
 std = true
 run = true
 
@@ -191,6 +193,7 @@ runners = "qemu-user qemu-system"
 target = "riscv64gc-unknown-linux-gnu"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 runners = "qemu-user qemu-system"
@@ -309,20 +312,23 @@ run = true
 target = "aarch64-linux-android"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 
 [[target]]
 target = "arm-linux-androideabi"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 
 [[target]]
 target = "armv7-linux-androideabi"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 
@@ -337,13 +343,15 @@ run = true
 target = "i686-linux-android"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 
 [[target]]
 target = "x86_64-linux-android"
 os = "ubuntu-latest"
 cpp = true
+dylib = true
 std = true
 run = true
 
@@ -387,12 +395,14 @@ build-std = true
 [[target]]
 target = "i686-unknown-freebsd"
 os = "ubuntu-latest"
+cpp = true
 dylib = true
 std = true
 
 [[target]]
 target = "x86_64-unknown-freebsd"
 os = "ubuntu-latest"
+cpp = true
 dylib = true
 std = true