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Jorge Aparicio
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add support for mips(el)-unknown-linux-musl
This target covers MIPS devices that run the trunk version of OpenWRT. The x86_64-unknown-linux-musl target always links statically to C libraries. For the mips(el)-unknown-linux-musl target, we opt for dynamic linking (like most of other targets do) to keep binary size down. As for the C compiler flags used in the build system, we use the same flags used for the mips(el)-unknown-linux-gnu target.
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‎.gitmodules

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@@ -16,4 +16,5 @@
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url = https://github.com/rust-lang/rust-installer.git
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[submodule "src/liblibc"]
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path = src/liblibc
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url = https://github.com/rust-lang-nursery/libc.git
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url = https://github.com/japaric/libc.git
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branch = mips-musl

‎configure

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@@ -1178,7 +1178,7 @@ do
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;;
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*-musl)
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x86_64-*-musl)
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if [ ! -f $CFG_MUSL_ROOT/lib/libc.a ]
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then
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err "musl libc $CFG_MUSL_ROOT/lib/libc.a not found"

‎mk/cfg/mips-unknown-linux-musl.mk

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# mips-unknown-linux-musl configuration
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CC_mips-unknown-linux-musl=mips-openwrt-linux-gcc
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CXX_mips-unknown-linux-musl=mips-openwrt-linux-g++
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CPP_mips-unknown-linux-musl=mips-openwrt-linux-gcc -E
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AR_mips-unknown-linux-musl=mips-openwrt-linux-ar
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CFG_LIB_NAME_mips-unknown-linux-musl=lib$(1).so
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CFG_STATIC_LIB_NAME_mips-unknown-linux-musl=lib$(1).a
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CFG_LIB_GLOB_mips-unknown-linux-musl=lib$(1)-*.so
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CFG_LIB_DSYM_GLOB_mips-unknown-linux-musl=lib$(1)-*.dylib.dSYM
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CFG_JEMALLOC_CFLAGS_mips-unknown-linux-musl := -mips32r2 -msoft-float -mabi=32 $(CFLAGS)
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CFG_GCCISH_CFLAGS_mips-unknown-linux-musl := -Wall -g -fPIC -mips32r2 -msoft-float -mabi=32 $(CFLAGS)
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CFG_GCCISH_CXXFLAGS_mips-unknown-linux-musl := -fno-rtti $(CXXFLAGS)
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CFG_GCCISH_LINK_FLAGS_mips-unknown-linux-musl := -shared -fPIC -g -mips32r2 -msoft-float -mabi=32
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CFG_GCCISH_DEF_FLAG_mips-unknown-linux-musl := -Wl,--export-dynamic,--dynamic-list=
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CFG_LLC_FLAGS_mips-unknown-linux-musl :=
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CFG_INSTALL_NAME_mips-unknown-linux-musl =
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CFG_EXE_SUFFIX_mips-unknown-linux-musl =
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CFG_WINDOWSY_mips-unknown-linux-musl :=
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CFG_UNIXY_mips-unknown-linux-musl := 1
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CFG_LDPATH_mips-unknown-linux-musl :=
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CFG_RUN_mips-unknown-linux-musl=
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CFG_RUN_TARG_mips-unknown-linux-musl=
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RUSTC_FLAGS_mips-unknown-linux-musl := -C target-cpu=mips32r2 -C target-feature="+mips32r2" -C soft-float
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CFG_GNU_TRIPLE_mips-unknown-linux-musl := mips-unknown-linux-musl

‎mk/cfg/mipsel-unknown-linux-musl.mk

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# mipsel-unknown-linux-musl configuration
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CC_mipsel-unknown-linux-musl=mipsel-openwrt-linux-gcc
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CXX_mipsel-unknown-linux-musl=mipsel-openwrt-linux-g++
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CPP_mipsel-unknown-linux-musl=mipsel-openwrt-linux-gcc
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AR_mipsel-unknown-linux-musl=mipsel-openwrt-linux-ar
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CFG_LIB_NAME_mipsel-unknown-linux-musl=lib$(1).so
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CFG_STATIC_LIB_NAME_mipsel-unknown-linux-musl=lib$(1).a
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CFG_LIB_GLOB_mipsel-unknown-linux-musl=lib$(1)-*.so
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CFG_LIB_DSYM_GLOB_mipsel-unknown-linux-musl=lib$(1)-*.dylib.dSYM
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CFG_JEMALLOC_CFLAGS_mipsel-unknown-linux-musl := -mips32 -mabi=32 $(CFLAGS)
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CFG_GCCISH_CFLAGS_mipsel-unknown-linux-musl := -Wall -g -fPIC -mips32 -mabi=32 $(CFLAGS)
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CFG_GCCISH_CXXFLAGS_mipsel-unknown-linux-musl := -fno-rtti $(CXXFLAGS)
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CFG_GCCISH_LINK_FLAGS_mipsel-unknown-linux-musl := -shared -fPIC -g -mips32
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CFG_GCCISH_DEF_FLAG_mipsel-unknown-linux-musl := -Wl,--export-dynamic,--dynamic-list=
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CFG_LLC_FLAGS_mipsel-unknown-linux-musl :=
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CFG_INSTALL_NAME_mipsel-unknown-linux-musl =
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CFG_EXE_SUFFIX_mipsel-unknown-linux-musl :=
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CFG_WINDOWSY_mipsel-unknown-linux-musl :=
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CFG_UNIXY_mipsel-unknown-linux-musl := 1
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CFG_LDPATH_mipsel-unknown-linux-musl :=
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CFG_RUN_mipsel-unknown-linux-musl=
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CFG_RUN_TARG_mipsel-unknown-linux-musl=
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RUSTC_FLAGS_mipsel-unknown-linux-musl := -C target-cpu=mips32 -C target-feature="+mips32"
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CFG_GNU_TRIPLE_mipsel-unknown-linux-musl := mipsel-unknown-linux-musl

‎src/liblibc

‎src/librustc_back/target/mips_unknown_linux_musl.rs

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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use target::Target;
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pub fn target() -> Target {
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Target {
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llvm_target: "mips-unknown-linux-musl".to_string(),
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target_endian: "big".to_string(),
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target_pointer_width: "32".to_string(),
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arch: "mips".to_string(),
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target_os: "linux".to_string(),
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target_env: "musl".to_string(),
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target_vendor: "unknown".to_string(),
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options: super::linux_base::opts()
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}
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}

‎src/librustc_back/target/mipsel_unknown_linux_musl.rs

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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use target::Target;
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pub fn target() -> Target {
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Target {
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llvm_target: "mipsel-unknown-linux-musl".to_string(),
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target_endian: "little".to_string(),
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target_pointer_width: "32".to_string(),
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arch: "mips".to_string(),
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target_os: "linux".to_string(),
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target_env: "musl".to_string(),
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target_vendor: "unknown".to_string(),
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options: super::linux_base::opts()
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}
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}

‎src/librustc_back/target/mod.rs

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@@ -420,6 +420,8 @@ impl Target {
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armv7_unknown_linux_gnueabihf,
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aarch64_unknown_linux_gnu,
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x86_64_unknown_linux_musl,
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mips_unknown_linux_musl,
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mipsel_unknown_linux_musl,
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i686_linux_android,
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arm_linux_androideabi,

‎src/libstd/os/linux/raw.rs

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@@ -93,11 +93,20 @@ mod arch {
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use os::raw::{c_long, c_ulong};
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use os::unix::raw::{gid_t, uid_t};
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96+
#[cfg(target_env = "musl")]
97+
#[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
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#[cfg(not(target_env = "musl"))]
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#[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i32;
97100
#[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = i32;
101+
#[cfg(target_env = "musl")]
102+
#[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
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#[cfg(not(target_env = "musl"))]
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#[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u32;
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#[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u32;
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#[cfg(target_env = "musl")]
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#[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = i32;
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#[cfg(not(target_env = "musl"))]
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#[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = i64;
101110
#[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i32;
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#[repr(C)]

‎src/libstd/sys/common/libunwind.rs

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@@ -101,9 +101,10 @@ pub type _Unwind_Exception_Cleanup_Fn =
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exception: *mut _Unwind_Exception);
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#[cfg_attr(any(all(target_os = "linux", not(target_env = "musl")),
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target_os = "freebsd"),
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target_os = "freebsd",
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all(target_os = "linux", target_env = "musl", not(target_arch = "x86_64"))),
105106
link(name = "gcc_s"))]
106-
#[cfg_attr(all(target_os = "linux", target_env = "musl", not(test)),
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#[cfg_attr(all(target_os = "linux", target_env = "musl", target_arch = "x86_64", not(test)),
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link(name = "unwind", kind = "static"))]
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#[cfg_attr(any(target_os = "android", target_os = "openbsd"),
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link(name = "gcc"))]

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