Add target docs for aarch64-apple-darwin (M1/M2 macs)

[TimTheBig]

Add target documentation for aarch64-apple-darwin; 64-bit ARM-based macs running macOS, specifically Macs with "M" series Apple Silicon chips.
"M" series macs are quite popular so it would be useful to have some docs.

[rustbot]

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[rustbot]

Some changes occurred in src/doc/rustc/src/platform-support

cc @Nilstrieb

[GuillaumeGomez]

r? Nilstrieb

[rust-log-analyzer]

The job x86_64-gnu-llvm-17 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

#16 exporting to docker image format
#16 sending tarball 30.7s done
#16 DONE 36.0s
##[endgroup]
Setting extra environment values for docker:  --env ENABLE_GCC_CODEGEN=1 --env GCC_EXEC_PREFIX=/usr/lib/gcc/
[CI_JOB_NAME=x86_64-gnu-llvm-17]
---
sccache: Starting the server...
##[group]Configure the build
configure: processing command line
configure: 
configure: build.configure-args := ['--build=x86_64-unknown-linux-gnu', '--llvm-root=/usr/lib/llvm-17', '--enable-llvm-link-shared', '--set', 'rust.thin-lto-import-instr-limit=10', '--set', 'change-id=99999999', '--enable-verbose-configure', '--enable-sccache', '--disable-manage-submodules', '--enable-locked-deps', '--enable-cargo-native-static', '--set', 'rust.codegen-units-std=1', '--set', 'dist.compression-profile=balanced', '--dist-compression-formats=xz', '--disable-dist-src', '--release-channel=nightly', '--enable-debug-assertions', '--enable-overflow-checks', '--enable-llvm-assertions', '--set', 'rust.verify-llvm-ir', '--set', 'rust.codegen-backends=llvm,cranelift,gcc', '--set', 'llvm.static-libstdcpp', '--enable-new-symbol-mangling']
configure: target.x86_64-unknown-linux-gnu.llvm-config := /usr/lib/llvm-17/bin/llvm-config
configure: llvm.link-shared     := True
configure: rust.thin-lto-import-instr-limit := 10
configure: change-id            := 99999999
---
  Downloaded boml v0.3.1
   Compiling boml v0.3.1
   Compiling y v0.1.0 (/checkout/compiler/rustc_codegen_gcc/build_system)
    Finished `release` profile [optimized] target(s) in 3.62s
     Running `/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-codegen/x86_64-unknown-linux-gnu/release/y test --use-system-gcc --use-backend gcc --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/cg_gcc --release --mini-tests --std-tests`
Using system GCC
[BUILD] example
[AOT] mini_core_hello_world
/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/cg_gcc/mini_core_hello_world
abc
---
##[group]Building stage0 tool linkchecker (x86_64-unknown-linux-gnu)
    Finished `release` profile [optimized] target(s) in 0.12s
##[endgroup]
##[group]Testing stage0 Linkcheck (x86_64-unknown-linux-gnu)
rustc/print.html:8743: broken link - `rustc/platform-support/aarch64-apple-darwin.html`
rustc/platform-support.html:249: broken link - `rustc/platform-support/aarch64-apple-darwin.html`
number of HTML files scanned: 38227
number of HTML redirects found: 12079
number of links checked: 3071877
number of links ignored due to external: 73231

[pthariensflame]

I think this section is supposed to be for building rustc such that it includes the target, not just for building code that uses the target. Although looking at the other documents it's kind of inconsistently used?

[TimTheBig]

The command for building the target std is always the same, so I think this should be fine.

[pthariensflame]

@rustbot label O-macos O-AArch64 A-docs

[pthariensflame]

#124146 may be useful to note?

[madsmtm]

I've documented this target (and more) in #124772 too.

[TimTheBig]

I've documented this target (and more) in #124772 too.

Nice 👍, @madsmtm, do you want to add this aarch64 doc to that pull.
edit: I misread, your docs do have aarch64 in them.

[madsmtm]

do you want to add this aarch64 doc to that pull.

Hmm, not sure what you mean by that? I've added documentation about it to the more general platform-support/apple-darwin.md file which also documents x86_64-apple-darwin.

[TimTheBig]

My mistake I misread. Your docs are good so I will close this pull, I look foreword to reading the new pages.