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Redox Cross Compilation #38401
Redox Cross Compilation #38401
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r? @sfackler (rust_highfive has picked a reviewer for you, use r? to override) |
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Hopefully these comments will help you navigate the changes.
@@ -0,0 +1 @@ | |||
# rustbuild-only target |
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The old build system is complicated to use, so there is no support for using it.
@@ -36,7 +36,8 @@ fn main() { | |||
// targets, which means we have to build the alloc_jemalloc crate | |||
// for targets like emscripten, even if we don't use it. | |||
if target.contains("rumprun") || target.contains("bitrig") || target.contains("openbsd") || | |||
target.contains("msvc") || target.contains("emscripten") || target.contains("fuchsia") { | |||
target.contains("msvc") || target.contains("emscripten") || target.contains("fuchsia") || | |||
target.contains("redox") { |
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We do not support jemalloc, so we will build with the dummy.
@@ -71,7 +72,49 @@ pub extern "C" fn __rust_usable_size(size: usize, align: usize) -> usize { | |||
imp::usable_size(size, align) | |||
} | |||
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#[cfg(unix)] | |||
#[cfg(target_os = "redox")] | |||
mod imp { |
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Just so we have a stub for potentially using a libc
allocator, we implement alloc_system
similarly to how the unix
implementation works. If desired, these two imp blocks could be combined.
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You're the one defining the abi of the system allocator, so this is largely up to you. If you follow unix's malloc/free conventions then I'd recommend unifying with the above block for Unix. That handles bits and pieces such as alignment for more-aligned types (e.g. simd types).
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I will probably change this to be different from Unix so that it defines externs that ralloc will fulfill.
use MIN_ALIGN; | ||
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||
pub unsafe fn allocate(size: usize, _align: usize) -> *mut u8 { | ||
libc::malloc(size as libc::size_t) as *mut u8 |
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memalign is not used like in the unix
implementation, perhaps this is a problem
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Yes I this is one case where I think you'll want to align with the implementation above. This really ends up just needing an allocator interface which supports alignment as an argument, and that's what memalign
is targeted at.
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Understood, thanks
@@ -19,6 +19,7 @@ | |||
issue = "27783")] | |||
#![feature(allocator)] | |||
#![feature(staged_api)] | |||
#![cfg_attr(target_os = "redox", feature(libc))] |
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Note that ralloc
is used as the default allocator in librust_back
. What we have done here is to ensure that liballoc_system
builds, as it is a required dependency of libstd
. We never link to it, however.
@@ -0,0 +1,232 @@ | |||
use core::{mem, slice}; |
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This is the definition of a Redox scheme. It could probably be removed.
@@ -0,0 +1,72 @@ | |||
use super::error::{Error, Result}; |
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This is the system call ABI definition for x86
@@ -0,0 +1,72 @@ | |||
use super::error::{Error, Result}; |
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This is the system call ABI definition for x86_64
@@ -914,6 +914,11 @@ fn use_color(opts: &TestOpts) -> bool { | |||
} | |||
} | |||
|
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#[cfg(target_os = "redox")] | |||
fn stdout_isatty() -> bool { |
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Redox needs to support isatty
. We return false
as a safe alternative
@@ -1103,6 +1108,12 @@ fn get_concurrency() -> usize { | |||
} | |||
} | |||
|
|||
#[cfg(target_os = "redox")] | |||
fn num_cpus() -> usize { |
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Redox needs to provide a way to get the number of CPUs. We return 1
as a safe alternative
Add memalign to Redox (for use in allocator) This is required to satisfy a review item here: rust-lang/rust#38401
@@ -19,7 +19,7 @@ | |||
issue = "27783")] | |||
#![feature(allocator)] | |||
#![feature(staged_api)] | |||
#![cfg_attr(unix, feature(libc))] | |||
#![cfg_attr(any(unix, target_os = "redox"), feature(libc))] |
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For alloc_system
, we simply reuse the unix
setup to allow a libc
implementation of an allocator
@@ -87,7 +87,7 @@ mod imp { | |||
} | |||
} | |||
|
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#[cfg(target_os = "android")] | |||
#[cfg(any(target_os = "android", target_os = "redox"))] |
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Newlib does not contain posix_memalign
, so we use memalign
linker_is_gnu: true, | ||
no_default_libraries: true, | ||
lib_allocation_crate: "alloc_system".to_string(), | ||
exe_allocation_crate: "alloc_system".to_string(), |
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We use alloc_system
as the default allocator. I personally would like to use ralloc
Can't wait for this to land 👌🏻 |
// Static link | ||
"-static".to_string() | ||
], | ||
late_link_args: vec![ |
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We late link libc and libm so that they can be provided when binaries are linked, rather than using the compiler defaults.
This looks great to me. The only thing that bothers me here is |
Ok @brson - Please see c59bb49. A minor mistake was fixed in 4dcb867. I changed all of the Unix platforms to I changed librustc/session/config.rs to accept target_family only from the target configuration, to insert it as |
@@ -943,26 +943,20 @@ pub fn default_configuration(sess: &Session) -> ast::CrateConfig { | |||
let vendor = &sess.target.target.target_vendor; | |||
let max_atomic_width = sess.target.target.max_atomic_width(); | |||
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let fam = if let Some(ref fam) = sess.target.target.options.target_family { | |||
Symbol::intern(fam) | |||
} else if sess.target.target.options.is_like_windows { |
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Since the windows platforms now correctly define target_family, this is no longer necessary.
@@ -38,7 +38,7 @@ pub fn opts() -> TargetOptions { | |||
relocation_model: "static".to_string(), | |||
disable_redzone: true, | |||
eliminate_frame_pointer: false, | |||
target_family: Some("redox".to_string()), | |||
target_family: None, |
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Redox no longer has a family :-(
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😢
@@ -24,6 +24,7 @@ pub fn opts() -> TargetOptions { | |||
staticlib_prefix: "".to_string(), | |||
staticlib_suffix: ".lib".to_string(), | |||
no_default_libraries: true, | |||
target_family: Some("windows".to_string()), |
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Both the windows bases are covered
@@ -37,6 +37,7 @@ pub fn opts() -> TargetOptions { | |||
function_sections: false, | |||
dynamic_linking: true, | |||
executables: true, | |||
target_family: Some("unix".to_string()), |
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Everything that isn't windows, is set to unix. That includes Linux, OS X, iOS, DragonflyBSD, NetBSD, OpenBSD, FreeBSD, Bitrig, Solaris, Fuchsia, and Haiku
@bors r+ I'm very happy with how this is turning out so far. I wish there wasn't so much cfg sprawl in non-std crates, but that's something we can figure out in the future. Tagging with relnotes not only for the redox support, but also the breaking change to target_family. |
📌 Commit 4dcb867 has been approved by |
Redox Cross Compilation I will admit - there are things here that I wish I did not have to do. This completes the ability to create a cross compiler from the rust repository for `x86_64-unknown-redox`. I will document this PR with inline comments explaining some things. [View this gist to see how a cross compiler is built](https://gist.github.com/jackpot51/6680ad973986e84d69c79854249f2b7e) Prior discussion of a smaller change is here: #38366
Thanks @brson |
Version 1.16.0 (2017-03-16) =========================== Language -------- * Lifetimes in statics and consts default to `'static`. [RFC 1623] * [The compiler's `dead_code` lint now accounts for type aliases][38051]. * [Uninhabitable enums (those without any variants) no longer permit wildcard match patterns][38069] * [Clean up semantics of `self` in an import list][38313] * [`Self` may appear in `impl` headers][38920] * [`Self` may appear in struct expressions][39282] Compiler -------- * [`rustc` now supports `--emit=metadata`, which causes rustc to emit a `.rmeta` file containing only crate metadata][38571]. This can be used by tools like the Rust Language Service to perform metadata-only builds. * [Levenshtein based typo suggestions now work in most places, while previously they worked only for fields and sometimes for local variables][38927]. Together with the overhaul of "no resolution"/"unexpected resolution" errors (#[38154]) they result in large and systematic improvement in resolution diagnostics. * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than `U`][38670] * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798] * [`rustc` no longer attempts to provide "consider using an explicit lifetime" suggestions][37057]. They were inaccurate. Stabilized APIs --------------- * [`VecDeque::truncate`] * [`VecDeque::resize`] * [`String::insert_str`] * [`Duration::checked_add`] * [`Duration::checked_sub`] * [`Duration::checked_div`] * [`Duration::checked_mul`] * [`str::replacen`] * [`str::repeat`] * [`SocketAddr::is_ipv4`] * [`SocketAddr::is_ipv6`] * [`IpAddr::is_ipv4`] * [`IpAddr::is_ipv6`] * [`Vec::dedup_by`] * [`Vec::dedup_by_key`] * [`Result::unwrap_or_default`] * [`<*const T>::wrapping_offset`] * [`<*mut T>::wrapping_offset`] * `CommandExt::creation_flags` * [`File::set_permissions`] * [`String::split_off`] Libraries --------- * [`[T]::binary_search` and `[T]::binary_search_by_key` now take their argument by `Borrow` parameter][37761] * [All public types in std implement `Debug`][38006] * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327] * [`Ipv6Addr` implements `From<[u16; 8]>`][38131] * [Ctrl-Z returns from `Stdin.read()` when reading from the console on Windows][38274] * [std: Fix partial writes in `LineWriter`][38062] * [std: Clamp max read/write sizes on Unix][38062] * [Use more specific panic message for `&str` slicing errors][38066] * [`TcpListener::set_only_v6` is deprecated][38304]. This functionality cannot be achieved in std currently. * [`writeln!`, like `println!`, now accepts a form with no string or formatting arguments, to just print a newline][38469] * [Implement `iter::Sum` and `iter::Product` for `Result`][38580] * [Reduce the size of static data in `std_unicode::tables`][38781] * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`, `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement `Display`][38909] * [`Duration` implements `Sum`][38712] * [`String` implements `ToSocketAddrs`][39048] Cargo ----- * [The `cargo check` command does a type check of a project without building it][cargo/3296] * [crates.io will display CI badges from Travis and AppVeyor, if specified in Cargo.toml][cargo/3546] * [crates.io will display categories listed in Cargo.toml][cargo/3301] * [Compilation profiles accept integer values for `debug`, in addition to `true` and `false`. These are passed to `rustc` as the value to `-C debuginfo`][cargo/3534] * [Implement `cargo --version --verbose`][cargo/3604] * [All builds now output 'dep-info' build dependencies compatible with make and ninja][cargo/3557] * [Build all workspace members with `build --all`][cargo/3511] * [Document all workspace members with `doc --all`][cargo/3515] * [Path deps outside workspace are not members][cargo/3443] Misc ---- * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies the path to the Rust implementation][38589] * [The `armv7-linux-androideabi` target no longer enables NEON extensions, per Google's ABI guide][38413] * [The stock standard library can be compiled for Redox OS][38401] * [Rust has initial SPARC support][38726]. Tier 3. No builds available. * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No builds available. * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379] Compatibility Notes ------------------- * [Uninhabitable enums (those without any variants) no longer permit wildcard match patterns][38069] * In this release, references to uninhabited types can not be pattern-matched. This was accidentally allowed in 1.15. * [The compiler's `dead_code` lint now accounts for type aliases][38051]. * [Ctrl-Z returns from `Stdin.read()` when reading from the console on Windows][38274] * [Clean up semantics of `self` in an import list][38313] [37057]: rust-lang/rust#37057 [37761]: rust-lang/rust#37761 [38006]: rust-lang/rust#38006 [38051]: rust-lang/rust#38051 [38062]: rust-lang/rust#38062 [38062]: rust-lang/rust#38622 [38066]: rust-lang/rust#38066 [38069]: rust-lang/rust#38069 [38131]: rust-lang/rust#38131 [38154]: rust-lang/rust#38154 [38274]: rust-lang/rust#38274 [38304]: rust-lang/rust#38304 [38313]: rust-lang/rust#38313 [38314]: rust-lang/rust#38314 [38327]: rust-lang/rust#38327 [38401]: rust-lang/rust#38401 [38413]: rust-lang/rust#38413 [38469]: rust-lang/rust#38469 [38559]: rust-lang/rust#38559 [38571]: rust-lang/rust#38571 [38580]: rust-lang/rust#38580 [38589]: rust-lang/rust#38589 [38670]: rust-lang/rust#38670 [38712]: rust-lang/rust#38712 [38726]: rust-lang/rust#38726 [38781]: rust-lang/rust#38781 [38798]: rust-lang/rust#38798 [38909]: rust-lang/rust#38909 [38920]: rust-lang/rust#38920 [38927]: rust-lang/rust#38927 [39048]: rust-lang/rust#39048 [39282]: rust-lang/rust#39282 [39379]: rust-lang/rust#39379 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen [cargo/3296]: rust-lang/cargo#3296 [cargo/3301]: rust-lang/cargo#3301 [cargo/3443]: rust-lang/cargo#3443 [cargo/3511]: rust-lang/cargo#3511 [cargo/3515]: rust-lang/cargo#3515 [cargo/3534]: rust-lang/cargo#3534 [cargo/3546]: rust-lang/cargo#3546 [cargo/3557]: rust-lang/cargo#3557 [cargo/3604]: rust-lang/cargo#3604 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
I will admit - there are things here that I wish I did not have to do. This completes the ability to create a cross compiler from the rust repository for
x86_64-unknown-redox
. I will document this PR with inline comments explaining some things.View this gist to see how a cross compiler is built
Prior discussion of a smaller change is here: #38366