Implement flexible target specification#16156

emberian · 2014-08-01T02:58:35Z

See commit message.

emberian · 2014-08-01T02:59:11Z

Still trying to figure out a bug where executables aren't getting the executable bit set...

emberian · 2014-08-01T07:25:43Z

Seems to have resolved itself with a rebase ¯_(ツ)_/¯

huonw · 2014-08-01T07:57:35Z

src/librustc_back/target/mod.rs

Who installs to /etc/rustc?

This feature may want to remain unimplemented for now due to some open questions here, but it probably doesn't matter too much.

huonw · 2014-08-01T07:59:34Z

Can you write a run-make test that checks the compiler is correctly searching for, parsing and using external specifications? (E.g. it could run rustc --target=foo-bar-baz --emit=asm ... with a custom target that disables stack checks, and then grep for stack checks.)

emberian · 2014-08-01T08:34:07Z

Another issue: probably needs to allow specifying target_os instead of taking it from the target triple. I'm not actually sure this is a good idea, though, and it seems MUCH more clear that the target_os comes from the triple name itself. But we'd need to rename "osx" to "darwin", which I feel is almost a lie? Not really sure. Need feedback.

emberian · 2014-08-01T08:34:21Z

(The RFC specifies taking it from the target)

emberian · 2014-08-01T09:05:17Z

@huonw how do those docs look?

emberian · 2014-08-01T09:11:38Z

Hm, glaringly obvious problem: linker should probably include a target triple prefix, for cross compiling. ie, x86_64-unknown-linux-gnu-cc.

errordeveloper · 2014-08-01T09:35:58Z

@farcaller we should try this with arm-none-eabi

emberian · 2014-08-01T09:44:23Z

Be warned that this isn't quite working yet. My current status is:

LLVM ERROR: not a number, or does not fit in an unsigned int

emberian · 2014-08-01T09:47:03Z

(Already fixed I think, still building..)

huonw · 2014-08-01T09:54:54Z

src/librustc_back/target/mod.rs

Do we have a story for interacting with cargo?

Not yet, no.

mneumann · 2014-08-01T14:44:09Z

When compiling this on DragonFly I run into these problems:

/home/mneumann/rust/src/liblibc/lib.rs:2943:47: 2943:53 error: unresolved import
 `types::os::arch::c95::c_uint`. Could not find `arch` in `types::os`.
/home/mneumann/rust/src/liblibc/lib.rs:2943             use types::os::arch::c95
::{c_int, c_uint};

          ^~~~~~
/home/mneumann/rust/src/liblibc/lib.rs:2965:17: 2965:44 error: unresolved import
 `types::os::arch::c95::c_int`. Could not find `arch` in `types::os`.
/home/mneumann/rust/src/liblibc/lib.rs:2965             use types::os::arch::c95
::c_int;
                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/mneumann/rust/src/liblibc/lib.rs:2966:17: 2966:49 error: unresolved import
 `types::os::arch::posix88::mode_t`. Could not find `arch` in `types::os`.
/home/mneumann/rust/src/liblibc/lib.rs:2966             use types::os::arch::pos
ix88::mode_t;
                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/mneumann/rust/src/liblibc/lib.rs:3209:17: 3209:44 error: unresolved import
 `types::os::arch::c95::c_int`. Could not find `arch` in `types::os`.
/home/mneumann/rust/src/liblibc/lib.rs:3209             use types::os::arch::c95
::c_int;
                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/mneumann/rust/src/liblibc/lib.rs:150:54: 150:58 error: unresolved import (
maybe you meant `stat::*`?)
/home/mneumann/rust/src/liblibc/lib.rs:150 pub use funcs::posix88::stat_::{chmod
, fstat, mkdir, stat};

                ^~~~
error: aborting due to 115 previous errors
gmake: *** [x86_64-unknown-dragonfly/stage1/lib/rustlib/x86_64-unknown-dragonfly
/lib/stamp.libc] Error 101

Maybe the target_os is incorrectly determined?

alexcrichton · 2014-08-01T14:45:37Z

src/librustc_back/target/apple_base.rs

false => true ?

Ah nevermind, it would be nice to preserve the comments in the source code to this target specification about why this is false

klutzy · 2014-10-29T09:07:19Z

src/librustc_back/target/windows_base.rs

Seems like x86_64 linker doesn't understand this option, but i686 does.

vadimcn · 2014-10-30T00:49:46Z

Rebased, fixed, squashed: https://github.com/vadimcn/rust/tree/flextarget. Passes tests on Windows.
@cmr: Do you want me to submit it?

aturon · 2014-10-31T20:23:15Z

Revived, yay!

klutzy · 2014-11-01T09:54:19Z

configure

- $gnu_t=$(to_gnu_triple $t) + gnu_t=$(to_gnu_triple $t)

Yup, @klutzy is absolutely right! I guess this doesn't break stuff unless LLVM needs to be rebuilt...

vadimcn · 2014-11-02T03:26:09Z

Darn it! What's going on here???

emberian · 2014-11-03T09:27:09Z

I can't replicate the android failure locally. @alexcrichton do you know what API level the emulators are using?

alexcrichton · 2014-11-03T16:30:36Z

Looks like #17448, but I think that we're using api version 19 maybe?

Removes all target-specific knowledge from rustc. Some targets have changed during this, but none of these should be very visible outside of cross-compilation. The changes make our targets more consistent. iX86-unknown-linux-gnu is now only available as i686-unknown-linux-gnu. We used to accept any value of X greater than 1. i686 was released in 1995, and should encompass the bare minimum of what Rust supports on x86 CPUs. The only two windows targets are now i686-pc-windows-gnu and x86_64-pc-windows-gnu. The iOS target has been renamed from arm-apple-ios to arm-apple-darwin. A complete list of the targets we accept now: arm-apple-darwin arm-linux-androideabi arm-unknown-linux-gnueabi arm-unknown-linux-gnueabihf i686-apple-darwin i686-pc-windows-gnu i686-unknown-freebsd i686-unknown-linux-gnu mips-unknown-linux-gnu mipsel-unknown-linux-gnu x86_64-apple-darwin x86_64-unknown-freebsd x86_64-unknown-linux-gnu x86_64-pc-windows-gnu Closes #16093 [breaking-change]

See commit message.

vadimcn · 2014-11-04T16:25:05Z

@cmr Congrats! :-)

huonw reviewed Aug 1, 2014
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bvssvni mentioned this pull request Aug 1, 2014

PNaCl support for Rust PistonDevelopers/piston#514

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huonw reviewed Aug 1, 2014
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alexcrichton reviewed Aug 1, 2014
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klutzy reviewed Oct 29, 2014
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src/librustc_back/target/windows_base.rs Outdated

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klutzy Oct 29, 2014

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Seems like x86_64 linker doesn't understand this option, but i686 does.

klutzy reviewed Nov 1, 2014
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emberian added 6 commits November 4, 2014 05:07

Use -m32 on 32bit Linux

0e03503

Same fix for mac32

4a6f4c9

Same fix for dragonfly

244bb14

Don't use pie on Android

70dedbb

Update some new use of the old targ_cfg

87a753e

Update for collections reform

61aeab4

bors added a commit that referenced this pull request Nov 4, 2014

auto merge of #16156 : cmr/rust/target-spec, r=alexcrichton

3a8f4ec

See commit message.

bors merged commit 61aeab4 into rust-lang:master Nov 4, 2014

ehuss mentioned this pull request Jul 20, 2019

Target specification? rust-lang/wg-cargo-std-aware#6

Closed

Mark-Simulacrum mentioned this pull request Apr 10, 2020

De-stabilize target spec JSON #71009

Closed

petrochenkov mentioned this pull request Apr 12, 2020

rustc_target: Refactor target specifications related to Windows and UEFI #71030

Merged

ehuss mentioned this pull request Jan 23, 2026

Tracking Issue for target-spec-json (flexible target specifications) #151528

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