Add i586-unknown-linux-musl target

.travis.yml

@@ -126,7 +126,7 @@ matrix:
       if: branch = auto
     - env: IMAGE=dist-armv7-linux DEPLOY=1
       if: branch = auto
-    - env: IMAGE=dist-i586-gnu-i686-musl DEPLOY=1
+    - env: IMAGE=dist-i586-gnu-i586-i686-musl DEPLOY=1
       if: branch = auto
     - env: IMAGE=dist-i686-freebsd DEPLOY=1
       if: branch = auto

src/bootstrap/configure.py

@@ -108,6 +108,8 @@ v("musl-root", "target.x86_64-unknown-linux-musl.musl-root",
   "MUSL root installation directory (deprecated)")
 v("musl-root-x86_64", "target.x86_64-unknown-linux-musl.musl-root",
   "x86_64-unknown-linux-musl install directory")
+v("musl-root-i586", "target.i586-unknown-linux-musl.musl-root",
+  "i586-unknown-linux-musl install directory")
 v("musl-root-i686", "target.i686-unknown-linux-musl.musl-root",
   "i686-unknown-linux-musl install directory")
 v("musl-root-arm", "target.arm-unknown-linux-musleabi.musl-root",

src/bootstrap/native.rs

@@ -429,6 +429,8 @@ impl Step for Openssl {
             "arm-unknown-linux-gnueabihf" => "linux-armv4",
             "armv7-linux-androideabi" => "android-armv7",
             "armv7-unknown-linux-gnueabihf" => "linux-armv4",
+            "i586-unknown-linux-gnu" => "linux-elf",
+            "i586-unknown-linux-musl" => "linux-elf",
             "i686-apple-darwin" => "darwin-i386-cc",
             "i686-linux-android" => "android-x86",
             "i686-unknown-freebsd" => "BSD-x86-elf",

src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile

@@ -21,6 +21,9 @@ COPY scripts/musl.sh /build/
 RUN CC=gcc CFLAGS="-m32 -fPIC -Wa,-mrelax-relocations=no" \
     CXX=g++ CXXFLAGS="-m32 -Wa,-mrelax-relocations=no" \
     bash musl.sh i686 --target=i686 && \
+    CC=gcc CFLAGS="-march=pentium -m32 -fPIC -Wa,-mrelax-relocations=no" \
+    CXX=g++ CXXFLAGS="-march=pentium -m32 -Wa,-mrelax-relocations=no" \
+    bash musl.sh i586 --target=i586 && \
     rm -rf /build
 
 COPY scripts/sccache.sh /scripts/
@@ -28,6 +31,7 @@ RUN sh /scripts/sccache.sh
 
 ENV RUST_CONFIGURE_ARGS \
       --target=i686-unknown-linux-musl,i586-unknown-linux-gnu \
+      --musl-root-i586=/musl-i586 \
       --musl-root-i686=/musl-i686 \
       --enable-extended
 
@@ -38,12 +42,13 @@ ENV RUST_CONFIGURE_ARGS \
 # See: https://github.com/rust-lang/rust/issues/34978
 ENV CFLAGS_i686_unknown_linux_musl=-Wa,-mrelax-relocations=no
 ENV CFLAGS_i586_unknown_linux_gnu=-Wa,-mrelax-relocations=no
+# FIXME remove -Wl,-melf_i386 after cc is updated to include
+#       https://github.com/alexcrichton/cc-rs/pull/281
+ENV CFLAGS_i586_unknown_linux_musl="-Wa,-mrelax-relocations=no -Wl,-melf_i386"
+
+ENV TARGETS=i586-unknown-linux-gnu
+ENV TARGETS=$TARGETS,i686-unknown-linux-musl
 
 ENV SCRIPT \
-      python2.7 ../x.py test \
-          --target i686-unknown-linux-musl \
-          --target i586-unknown-linux-gnu \
-          && \
-      python2.7 ../x.py dist \
-          --target i686-unknown-linux-musl \
-          --target i586-unknown-linux-gnu
+      python2.7 ../x.py test --target $TARGETS && \
+      python2.7 ../x.py dist --target $TARGETS,i586-unknown-linux-musl

src/ci/docker/scripts/musl.sh

@@ -39,7 +39,7 @@ fi
 
 cd $MUSL
 ./configure --disable-shared --prefix=/musl-$TAG $@
-if [ "$TAG" = "i686" ]; then
+if [ "$TAG" = "i586" -o "$TAG" = "i686" ]; then
   hide_output make -j$(nproc) AR=ar RANLIB=ranlib
 else
   hide_output make -j$(nproc)

src/librustc_back/target/i586_unknown_linux_musl.rs

@@ -0,0 +1,18 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use target::TargetResult;
+
+pub fn target() -> TargetResult {
+    let mut base = super::i686_unknown_linux_musl::target()?;
+    base.options.cpu = "pentium".to_string();
+    base.llvm_target = "i586-unknown-linux-musl".to_string();
+    Ok(base)
+}

src/librustc_back/target/mod.rs

@@ -147,6 +147,7 @@ supported_targets! {
     ("powerpc64-unknown-linux-gnu", powerpc64_unknown_linux_gnu),
     ("powerpc64le-unknown-linux-gnu", powerpc64le_unknown_linux_gnu),
     ("s390x-unknown-linux-gnu", s390x_unknown_linux_gnu),
+    ("sparc64-unknown-linux-gnu", sparc64_unknown_linux_gnu),
     ("arm-unknown-linux-gnueabi", arm_unknown_linux_gnueabi),
     ("arm-unknown-linux-gnueabihf", arm_unknown_linux_gnueabihf),
     ("arm-unknown-linux-musleabi", arm_unknown_linux_musleabi),
@@ -156,16 +157,17 @@ supported_targets! {
     ("armv7-unknown-linux-gnueabihf", armv7_unknown_linux_gnueabihf),
     ("armv7-unknown-linux-musleabihf", armv7_unknown_linux_musleabihf),
     ("aarch64-unknown-linux-gnu", aarch64_unknown_linux_gnu),
+
     ("aarch64-unknown-linux-musl", aarch64_unknown_linux_musl),
     ("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
     ("i686-unknown-linux-musl", i686_unknown_linux_musl),
+    ("i586-unknown-linux-musl", i586_unknown_linux_musl),
     ("mips-unknown-linux-musl", mips_unknown_linux_musl),
     ("mipsel-unknown-linux-musl", mipsel_unknown_linux_musl),
+
     ("mips-unknown-linux-uclibc", mips_unknown_linux_uclibc),
     ("mipsel-unknown-linux-uclibc", mipsel_unknown_linux_uclibc),
 
-    ("sparc64-unknown-linux-gnu", sparc64_unknown_linux_gnu),
-
     ("i686-linux-android", i686_linux_android),
     ("x86_64-linux-android", x86_64_linux_android),
     ("arm-linux-androideabi", arm_linux_androideabi),

src/tools/build-manifest/src/main.rs

@@ -67,6 +67,7 @@ static TARGETS: &'static [&'static str] = &[
     "i386-apple-ios",
     "i586-pc-windows-msvc",
     "i586-unknown-linux-gnu",
+    "i586-unknown-linux-musl",
     "i686-apple-darwin",
     "i686-linux-android",
     "i686-pc-windows-gnu",