Auto merge of #115238 - workingjubilee:ich-entferne-welke-blumen, r=nikic

Formally demote tier 2 MIPS targets to tier 3

Per https://github.com/rust-lang/compiler-team/issues/648

Fixes https://github.com/rust-lang/rust/issues/115218

src/ci/docker/host-x86_64/dist-various-1/Dockerfile

@@ -29,8 +29,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   g++-arm-linux-gnueabi \
   g++-arm-linux-gnueabihf \
   g++-aarch64-linux-gnu \
-  g++-mips64-linux-gnuabi64 \
-  g++-mips64el-linux-gnuabi64 \
   gcc-arm-none-eabi \
   gcc-sparc64-linux-gnu \
   libc6-dev-sparc64-cross \
@@ -48,12 +46,6 @@ WORKDIR /build
 COPY host-x86_64/dist-various-1/install-x86_64-redox.sh /build
 RUN ./install-x86_64-redox.sh
 
-COPY host-x86_64/dist-various-1/install-mips-musl.sh /build
-RUN ./install-mips-musl.sh
-
-COPY host-x86_64/dist-various-1/install-mipsel-musl.sh /build
-RUN ./install-mipsel-musl.sh
-
 COPY host-x86_64/dist-various-1/install-aarch64-none-elf.sh /build
 RUN ./install-aarch64-none-elf.sh
 
@@ -76,32 +68,7 @@ RUN env \
     env \
     CC=arm-linux-gnueabihf-gcc CFLAGS="-march=armv7-a+fp" \
     CXX=arm-linux-gnueabihf-g++ CXXFLAGS="-march=armv7-a+fp" \
-    bash musl.sh armv7hf && \
+    bash musl.sh armv7hf
-    env \
-    CC=mips-openwrt-linux-gcc \
-    CXX=mips-openwrt-linux-g++ \
-    bash musl.sh mips && \
-    env \
-    CC=mipsel-openwrt-linux-gcc \
-    CXX=mipsel-openwrt-linux-g++ \
-    bash musl.sh mipsel && \
-    env \
-    CC=mips64-linux-gnuabi64-gcc \
-    CXX=mips64-linux-gnuabi64-g++ \
-    bash musl.sh mips64 && \
-    env \
-    CC=mips64el-linux-gnuabi64-gcc \
-    CXX=mips64el-linux-gnuabi64-g++ \
-    bash musl.sh mips64el && \
-    rm -rf /build/*
-
-# FIXME(mozilla/sccache#235) this shouldn't be necessary but is currently
-# necessary to disambiguate the mips compiler with the mipsel compiler. We want
-# to give these two wrapper scripts (currently identical ones) different hashes
-# to ensure that sccache understands that they're different compilers.
-RUN \
-  echo "# a" >> /usr/local/mips-linux-musl/bin/mips-openwrt-linux-musl-wrapper.sh && \
-  echo "# b" >> /usr/local/mipsel-linux-musl/bin/mipsel-openwrt-linux-musl-wrapper.sh
 
 ENV RUN_MAKE_TARGETS=thumbv6m-none-eabi
 ENV RUN_MAKE_TARGETS=$RUN_MAKE_TARGETS,thumbv7m-none-eabi
@@ -110,10 +77,6 @@ ENV RUN_MAKE_TARGETS=$RUN_MAKE_TARGETS,thumbv7em-none-eabihf
 
 ENV TARGETS=asmjs-unknown-emscripten
 ENV TARGETS=$TARGETS,wasm32-unknown-emscripten
-ENV TARGETS=$TARGETS,mips-unknown-linux-musl
-ENV TARGETS=$TARGETS,mipsel-unknown-linux-musl
-ENV TARGETS=$TARGETS,mips64-unknown-linux-muslabi64
-ENV TARGETS=$TARGETS,mips64el-unknown-linux-muslabi64
 ENV TARGETS=$TARGETS,arm-unknown-linux-musleabi
 ENV TARGETS=$TARGETS,arm-unknown-linux-musleabihf
 ENV TARGETS=$TARGETS,armv5te-unknown-linux-gnueabi
@@ -149,10 +112,6 @@ ENV CFLAGS_armv5te_unknown_linux_musleabi="-march=armv5te -marm -mfloat-abi=soft
     CFLAGS_arm_unknown_linux_musleabi="-march=armv6 -marm" \
     CFLAGS_arm_unknown_linux_musleabihf="-march=armv6 -marm -mfpu=vfp" \
     CFLAGS_armv7_unknown_linux_musleabihf="-march=armv7-a+fp" \
-    CC_mipsel_unknown_linux_musl=mipsel-openwrt-linux-gcc \
-    CC_mips_unknown_linux_musl=mips-openwrt-linux-gcc \
-    CC_mips64el_unknown_linux_muslabi64=mips64el-linux-gnuabi64-gcc \
-    CC_mips64_unknown_linux_muslabi64=mips64-linux-gnuabi64-gcc \
     CC_sparc64_unknown_linux_gnu=sparc64-linux-gnu-gcc \
     CC_x86_64_unknown_redox=x86_64-unknown-redox-gcc \
     CC_thumbv7neon_unknown_linux_gnueabihf=arm-linux-gnueabihf-gcc \
@@ -177,10 +136,6 @@ ENV RUST_CONFIGURE_ARGS \
       --musl-root-arm=/musl-arm \
       --musl-root-armhf=/musl-armhf \
       --musl-root-armv7hf=/musl-armv7hf \
-      --musl-root-mips=/musl-mips \
-      --musl-root-mipsel=/musl-mipsel \
-      --musl-root-mips64=/musl-mips64 \
-      --musl-root-mips64el=/musl-mips64el \
       --disable-docs
 
 ENV SCRIPT \

src/ci/docker/host-x86_64/dist-various-1/install-mips-musl.sh

@@ -1,15 +0,0 @@
-#!/bin/sh
-set -ex
-
-mkdir /usr/local/mips-linux-musl
-
-# originally from
-# https://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/
-# OpenWrt-Toolchain-ar71xx-generic_gcc-5.3.0_musl-1.1.16.Linux-x86_64.tar.bz2
-URL="https://ci-mirrors.rust-lang.org/rustc"
-FILE="OpenWrt-Toolchain-ar71xx-generic_gcc-5.3.0_musl-1.1.16.Linux-x86_64.tar.bz2"
-curl -L "$URL/$FILE" | tar xjf - -C /usr/local/mips-linux-musl --strip-components=2
-
-for file in /usr/local/mips-linux-musl/bin/mips-openwrt-linux-*; do
-  ln -s $file /usr/local/bin/`basename $file`
-done

src/ci/docker/host-x86_64/dist-various-1/install-mipsel-musl.sh

@@ -1,15 +0,0 @@
-#!/bin/sh
-set -ex
-
-mkdir /usr/local/mipsel-linux-musl
-
-# Note that this originally came from:
-# https://downloads.openwrt.org/snapshots/trunk/malta/generic/
-# OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2
-URL="https://ci-mirrors.rust-lang.org/rustc"
-FILE="OpenWrt-Toolchain-malta-le_gcc-5.3.0_musl-1.1.15.Linux-x86_64.tar.bz2"
-curl -L "$URL/$FILE" | tar xjf - -C /usr/local/mipsel-linux-musl --strip-components=2
-
-for file in /usr/local/mipsel-linux-musl/bin/mipsel-openwrt-linux-*; do
-  ln -s $file /usr/local/bin/`basename $file`
-done

src/doc/rustc/src/platform-support.md

@@ -93,10 +93,6 @@ target | notes
 `arm-unknown-linux-gnueabihf` | ARMv6 Linux, hardfloat (kernel 3.2, glibc 2.17)
 `armv7-unknown-linux-gnueabihf` | ARMv7-A Linux, hardfloat (kernel 3.2, glibc 2.17)
 [`loongarch64-unknown-linux-gnu`](platform-support/loongarch-linux.md) | LoongArch64 Linux, LP64D ABI (kernel 5.19, glibc 2.36)
-`mips-unknown-linux-gnu` | MIPS Linux (kernel 4.4, glibc 2.23)
-`mips64-unknown-linux-gnuabi64` | MIPS64 Linux, n64 ABI (kernel 4.4, glibc 2.23)
-`mips64el-unknown-linux-gnuabi64` | MIPS64 (LE) Linux, n64 ABI (kernel 4.4, glibc 2.23)
-`mipsel-unknown-linux-gnu` | MIPS (LE) Linux (kernel 4.4, glibc 2.23)
 `powerpc-unknown-linux-gnu` | PowerPC Linux (kernel 3.2, glibc 2.17)
 `powerpc64-unknown-linux-gnu` | PPC64 Linux (kernel 3.2, glibc 2.17)
 `powerpc64le-unknown-linux-gnu` | PPC64LE Linux (kernel 3.10, glibc 2.17)
@@ -162,10 +158,6 @@ target | std | notes
 [`i686-unknown-uefi`](platform-support/unknown-uefi.md) | * | 32-bit UEFI
 [`loongarch64-unknown-none`](platform-support/loongarch-none.md) | * |  | LoongArch64 Bare-metal (LP64D ABI)
 [`loongarch64-unknown-none-softfloat`](platform-support/loongarch-none.md) | * |  | LoongArch64 Bare-metal (LP64S ABI)
-`mips-unknown-linux-musl` | ✓ | MIPS Linux with MUSL
-`mips64-unknown-linux-muslabi64` | ✓ | MIPS64 Linux, n64 ABI, MUSL
-`mips64el-unknown-linux-muslabi64` | ✓ | MIPS64 (LE) Linux, n64 ABI, MUSL
-`mipsel-unknown-linux-musl` | ✓ | MIPS (LE) Linux with MUSL
 [`nvptx64-nvidia-cuda`](platform-support/nvptx64-nvidia-cuda.md) | * | --emit=asm generates PTX code that [runs on NVIDIA GPUs]
 `riscv32i-unknown-none-elf` | * | Bare RISC-V (RV32I ISA)
 `riscv32imac-unknown-none-elf` | * | Bare RISC-V (RV32IMAC ISA)
@@ -282,8 +274,16 @@ target | std | host | notes
 `i686-uwp-windows-msvc` | ? |  | [^x86_32-floats-return-ABI]
 `i686-wrs-vxworks` | ? |  | [^x86_32-floats-return-ABI]
 [`m68k-unknown-linux-gnu`](platform-support/m68k-unknown-linux-gnu.md) | ? |  | Motorola 680x0 Linux
+`mips-unknown-linux-gnu` | ✓ | ✓ | MIPS Linux (kernel 4.4, glibc 2.23)
+`mips-unknown-linux-musl` | ✓ |  | MIPS Linux with musl libc
 `mips-unknown-linux-uclibc` | ✓ |  | MIPS Linux with uClibc
 [`mips64-openwrt-linux-musl`](platform-support/mips64-openwrt-linux-musl.md) | ? |  | MIPS64 for OpenWrt Linux MUSL
+`mips64-unknown-linux-gnuabi64` | ✓ | ✓ | MIPS64 Linux, N64 ABI (kernel 4.4, glibc 2.23)
+`mips64-unknown-linux-muslabi64` | ✓ |  | MIPS64 Linux, N64 ABI, musl libc
+`mips64el-unknown-linux-gnuabi64` | ✓ | ✓ | MIPS64 (little endian) Linux, N64 ABI (kernel 4.4, glibc 2.23)
+`mips64el-unknown-linux-muslabi64` | ✓ |  | MIPS64 (little endian) Linux, N64 ABI, musl libc
+`mipsel-unknown-linux-gnu` | ✓ | ✓ | MIPS (little endian) Linux (kernel 4.4, glibc 2.23)
+`mipsel-unknown-linux-musl` | ✓ |  | MIPS (little endian) Linux with musl libc
 `mipsel-sony-psp` | * |  | MIPS (LE) Sony PlayStation Portable (PSP)
 [`mipsel-sony-psx`](platform-support/mipsel-sony-psx.md) | * |  | MIPS (LE) Sony PlayStation 1 (PSX)
 `mipsel-unknown-linux-uclibc` | ✓ |  | MIPS (LE) Linux with uClibc