| Age | Commit message (Collapse) | Author | Lines |
|
|
|
|
|
|
|
All musl targets except mips[el] assume static linking by default. This
can be confusing
https://users.rust-lang.org/t/static-cross-compiled-binaries-arent-really-static/6084
When the musl/mips[el] targets was
[added](https://github.com/rust-lang/rust/pull/31298), dynamic linking
was chosen because of binary size concerns, and probably also because
libunwind
[didn't](https://users.rust-lang.org/t/static-cross-compiled-binaries-arent-really-static/6084/8)
supported mips.
Now that we have `crt-static` target-feature (the user can choose
dynamic link for musl targets), and libunwind
[6.0](https://github.com/llvm-mirror/libunwind/commits/release_60) add
support to mips, we do not need to assume dynamic linking.
|
|
(all i32 for now, as in liblibc)
|
|
This PR is an implementation of [RFC 1974] which specifies a new method of
defining a global allocator for a program. This obsoletes the old
`#![allocator]` attribute and also removes support for it.
[RFC 1974]: https://github.com/rust-lang/rfcs/pull/197
The new `#[global_allocator]` attribute solves many issues encountered with the
`#![allocator]` attribute such as composition and restrictions on the crate
graph itself. The compiler now has much more control over the ABI of the
allocator and how it's implemented, allowing much more freedom in terms of how
this feature is implemented.
cc #27389
|
|
This patch adds a `-Z linker-flavor` flag to rustc which can be used to invoke
the linker using a different interface.
For example, by default rustc assumes that all the Linux targets will be linked
using GCC. This makes it impossible to use LLD as a linker using just `-C
linker=ld.lld` because that will invoke LLD with invalid command line
arguments. (e.g. rustc will pass -Wl,--gc-sections to LLD but LLD doesn't
understand that; --gc-sections would be the right argument)
With this patch one can pass `-Z linker-flavor=ld` to rustc to invoke the linker
using a LD-like interface. This way, `rustc -C linker=ld.lld -Z
linker-flavor=ld` will invoke LLD with the right arguments.
`-Z linker-flavor` accepts 4 different arguments: `em` (emcc), `ld`,
`gcc`, `msvc` (link.exe). `em`, `gnu` and `msvc` cover all the existing linker
interfaces. `ld` is a new flavor for interfacing GNU's ld and LLD.
This patch also changes target specifications. `linker-flavor` is now a
mandatory field that specifies the *default* linker flavor that the target will
use. This change also makes the linker interface *explicit*; before, it used to
be derived from other fields like linker-is-gnu, is-like-msvc,
is-like-emscripten, etc.
Another change to target specifications is that the fields `pre-link-args`,
`post-link-args` and `late-link-args` now expect a map from flavor to linker
arguments.
``` diff
- "pre-link-args": ["-Wl,--as-needed", "-Wl,-z,-noexecstack"],
+ "pre-link-args": {
+ "gcc": ["-Wl,--as-needed", "-Wl,-z,-noexecstack"],
+ "ld": ["--as-needed", "-z,-noexecstack"],
+ },
```
[breaking-change] for users of custom targets specifications
|
|
Sounds like jemalloc is broken on systems which differ in page size than the
host it was compiled on (unless an option was passed). This unfortunately
reduces the portability of binaries created and can often make Rust segfault by
default. For now let's patch over this by disabling jemalloc until we can figure
out a better solution.
Closes #36994
Closes #37320
cc jemalloc/jemalloc#467
|
|
to better express the idea that omitting this field defaults this value
to target_pointer_width
|
|
Change all the target generation functions to return a Result<Target,
String> so that targets that are unable to be instantiated can be
expressed as an Err instead of a panic!(). This should improve #33497 as
well.
|
|
|
|
|
|
cf #31303
|
|
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.
|