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Rollup merge of #111326 - he32:netbsd-aarch64-be, r=oli-obk
Add support for NetBSD/aarch64-be (big-endian arm64).
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compiler/rustc_target/src/spec/aarch64_be_unknown_netbsd.rs
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| @@ -0,0 +1,17 @@ | ||
| use crate::abi::Endian; | ||
| use crate::spec::{Target, TargetOptions}; | ||
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| pub fn target() -> Target { | ||
| Target { | ||
| llvm_target: "aarch64_be-unknown-netbsd".into(), | ||
| pointer_width: 64, | ||
| data_layout: "E-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".into(), | ||
| arch: "aarch64".into(), | ||
| options: TargetOptions { | ||
| mcount: "__mcount".into(), | ||
| max_atomic_width: Some(128), | ||
| endian: Endian::Big, | ||
| ..super::netbsd_base::opts() | ||
| }, | ||
| } | ||
| } |
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| # \*-unknown-netbsd | ||
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| **Tier: 3** | ||
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| [NetBSD] multi-platform 4.4BSD-based UNIX-like operating system. | ||
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| [NetBSD]: https://www.NetBSD.org/ | ||
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| The target names follow this format: `$ARCH-unknown-netbsd{-$SUFFIX}`, | ||
| where `$ARCH` specifies the target processor architecture and | ||
| `-$SUFFIX` (optional) might indicate the ABI. The following targets | ||
| are currently defined running NetBSD: | ||
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| | Target name | NetBSD Platform | | ||
| |--------------------------------|-----------------| | ||
| | `amd64-unknown-netbsd` | [amd64 / x86_64 systems](https://wiki.netbsd.org/ports/amd64/) | | ||
| | `armv7-unknown-netbsd-eabihf` | [32-bit ARMv7 systems with hard-float](https://wiki.netbsd.org/ports/evbarm/) | | ||
| | `armv6-unknown-netbsd-eabihf` | [32-bit ARMv6 systems with hard-float](https://wiki.netbsd.org/ports/evbarm/) | | ||
| | `aarch64-unknown-netbsd` | [64-bit ARM systems, little-endian](https://wiki.netbsd.org/ports/evbarm/) | | ||
| | `aarch64_be-unknown-netbsd` | [64-bit ARM systems, big-endian](https://wiki.netbsd.org/ports/evbarm/) | | ||
| | `i586-unknown-netbsd` | [32-bit i386, restricted to Pentium](https://wiki.netbsd.org/ports/i386/) | | ||
| | `i686-unknown-netbsd` | [32-bit i386 with SSE](https://wiki.netbsd.org/ports/i386/) | | ||
| | `mipsel-unknown-netbsd` | [32-bit mips, requires mips32 cpu support](https://wiki.netbsd.org/ports/evbmips/) | | ||
| | `powerpc-unknown-netbsd` | [Various 32-bit PowerPC systems, e.g. MacPPC](https://wiki.netbsd.org/ports/macppc/) | | ||
| | `sparc64-unknown-netbsd` | [Sun UltraSPARC systems](https://wiki.netbsd.org/ports/sparc64/) | | ||
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| All use the "native" `stdc++` library which goes along with the natively | ||
| supplied GNU C++ compiler for the given OS version. Many of the bootstraps | ||
| are built for NetBSD 9.x, although some exceptions exist (some | ||
| are built for NetBSD 8.x but also work on newer OS versions). | ||
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| ## Designated Developers | ||
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| - [@he32](https://github.com/he32), `he@NetBSD.org` | ||
| - [NetBSD/pkgsrc-wip's rust](https://github.com/NetBSD/pkgsrc-wip/blob/master/rust/Makefile) maintainer (see MAINTAINER variable). This package is part of "pkgsrc work-in-progress" and is used for deployment and testing of new versions of rust | ||
| - [NetBSD's pkgsrc lang/rust](https://github.com/NetBSD/pkgsrc/tree/trunk/lang/rust) for the "proper" package in pkgsrc. | ||
| - [NetBSD's pkgsrc lang/rust-bin](https://github.com/NetBSD/pkgsrc/tree/trunk/lang/rust-bin) which re-uses the bootstrap kit as a binary distribution and therefore avoids the rather protracted native build time of rust itself | ||
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| Fallback to pkgsrc-users@NetBSD.org, or fault reporting via NetBSD's | ||
| bug reporting system. | ||
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| ## Requirements | ||
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| The `amd64-unknown-netbsd` artifacts is being distributed by the | ||
| rust project. | ||
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| The other targets are built by the designated developers (see above), | ||
| and the targets are initially cross-compiled, but many if not most | ||
| of them are also built natively as part of testing. | ||
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| ## Building | ||
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| The default build mode for the packages is a native build. | ||
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| ## Cross-compilation | ||
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| These targets can be cross-compiled, and we do that via the pkgsrc | ||
| package(s). | ||
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| Cross-compilation typically requires the "tools" and "dest" trees | ||
| resulting from a normal cross-build of NetBSD itself, ref. our main | ||
| build script, `build.sh`. | ||
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| See e.g. [do-cross.mk | ||
| Makefile](https://github.com/NetBSD/pkgsrc/tree/trunk/lang/rust/do-cross.mk) | ||
| for the Makefile used to cross-build all the above NetBSD targets | ||
| (except for the `amd64` target). | ||
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| The major option for the rust build is whether to build rust with | ||
| the LLVM rust carries in its distribution, or use the LLVM package | ||
| installed from pkgsrc. The `PKG_OPTIONS.rust` option is | ||
| `rust-internal-llvm`, ref. [the rust package's options.mk make | ||
| fragment](https://github.com/NetBSD/pkgsrc/blob/trunk/lang/rust/options.mk). | ||
| It defaults to being set for a few of the above platforms, for | ||
| various reasons (see comments), but is otherwise unset and therefore | ||
| indicates use of the pkgsrc LLVM. | ||
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| ## Testing | ||
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| The Rust testsuite could presumably be run natively. | ||
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| For the systems where the maintainer can build natively, the rust | ||
| compiler itself is re-built natively. This involves the rust compiler | ||
| being re-built with the newly self-built rust compiler, so excercises | ||
| the result quite extensively. | ||
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| Additionally, for some systems we build `librsvg`, and for the more | ||
| capable systems we build and test `firefox` (amd64, i386, aarch64). | ||
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| ## Building Rust programs | ||
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| Rust ships pre-compiled artifacts for the `amd64-unknown-netbsd` | ||
| target. | ||
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| For the other systems mentioned above, using the `pkgsrc` route is | ||
| probably the easiest, possibly via the `rust-bin` package to save | ||
| time, see the `RUST_TYPE` variable from the `rust.mk` Makefile | ||
| fragment. | ||
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| The pkgsrc rust package has a few files to assist with building | ||
| pkgsrc packages written in rust, ref. the `rust.mk` and `cargo.mk` | ||
| Makefile fragments in the `lang/rust` package. |