Flowistry 0.5.41 fails to cross-compile on Macbook M1

[yarrow]

Likely this is because I'm running an x86_64 compiler but asking it to build for Apple silicon. (I've been reluctant to use a Tier 2 compiler since no CI tests are run, so my rustc is x86_64 running under Rosetta; on the other hand, some other projects run better when compiled for Apple silicon. This is the first time I've run into a problem with the setup.)

Flowistry could not run because your project failed to build with error:
error[E0463]: can't find crate for `std`
  |
  = note: the `aarch64-apple-darwin` target may not be installed
  = help: consider downloading the target with `rustup target add aarch64-apple-darwin`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error[E0463]: can't find crate for `core`
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/lib.rs:257:13
    |
257 |     pub use core;
    |             ^^^^ can't find crate
    |
    = note: the `aarch64-apple-darwin` target may not be installed
    = help: consider downloading the target with `rustup target add aarch64-apple-darwin`
    = help: consider building the standard library from source with `cargo build -Zbuild-std`

error[E0463]: can't find crate for `core`
 --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:1:5
  |
1 | use core::{
  |     ^^^^ can't find crate
  |
  = note: the `aarch64-apple-darwin` target may not be installed
  = help: consider downloading the target with `rustup target add aarch64-apple-darwin`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error[E0463]: can't find crate for `core`
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:33:5
   |
33 | use core::fmt::{self, Write};
   |     ^^^^ can't find crate
   |
   = note: the `aarch64-apple-darwin` target may not be installed
   = help: consider downloading the target with `rustup target add aarch64-apple-darwin`
   = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: cannot find macro `vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:336:25
    |
336 |     let mut distances = vec![0; (a_len + 2) * (b_len + 2)];
    |                         ^^^

error: cannot find macro `write` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:24:9
   |
24 |         write!(fmt, "{}", text)
   |         ^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:368:21
    |
368 |                       write!(writer, "{:x}", self)
    |                       ^^^^^
...
384 | / impl_bits! {
385 | |     u8, i8,
386 | |     u16, i16,
387 | |     u32, i32,
...   |
390 | |     usize, isize,
391 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `impl_bits` (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:13:3
   |
13 | #[derive(Debug, PartialEq)]
   |   ^^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:374:21
    |
374 |                       write!(writer, "{:x}", self)
    |                       ^^^^^
...
384 | / impl_bits! {
385 | |     u8, i8,
386 | |     u16, i16,
387 | |     u32, i32,
...   |
390 | |     usize, isize,
391 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `impl_bits` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0416]: identifier `None` is bound more than once in the same pattern
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:43:20
   |
43 |             (None, None) => return Ok(count),
   |                    ^^^^ used in a pattern more than once

error: cannot find attribute `derive` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:158:3
    |
158 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:161:3
    |
161 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:220:17
    |
220 |                 write!(f, "unrecognized named flag")?;
    |                 ^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:224:21
    |
224 |                     write!(f, " `{}`", _got)?;
    |                     ^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:230:17
    |
230 |                 write!(f, "invalid hex flag")?;
    |                 ^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:234:21
    |
234 |                     write!(f, " `{}`", _got)?;
    |                     ^^^^^

error: cannot find macro `write` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:238:17
    |
238 |                 write!(f, "encountered empty flag")?;
    |                 ^^^^^

error[E0412]: cannot find type `Result` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:19:43
   |
19 |     fn fmt(&self, fmt: &mut Formatter) -> Result<(), fmt::Error> {
   |                                           ^^^^^^ not found in this scope

error[E0412]: cannot find type `Result` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:30:26
   |
30 | pub type HammingResult = Result<usize, StrSimError>;
   |                          ^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:35:18
   |
35 |     where Iter1: IntoIterator<Item=Elem1>,
   |                  ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:36:18
   |
36 |           Iter2: IntoIterator<Item=Elem2>,
   |                  ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `PartialEq` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:37:18
   |
37 |           Elem1: PartialEq<Elem2> {
   |                  ^^^^^^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:42:14
   |
42 |             (Some(x), Some(y)) => if x != y { count += 1 },
   |              ^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:42:23
   |
42 |             (Some(x), Some(y)) => if x != y { count += 1 },
   |                       ^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:66:22
   |
66 |     where &'a Iter1: IntoIterator<Item=Elem1>,
   |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:67:22
   |
67 |           &'b Iter2: IntoIterator<Item=Elem2>,
   |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `PartialEq` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:68:18
   |
68 |           Elem1: PartialEq<Elem2> {
   |                  ^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:135:14
    |
135 | impl<'a, 'b> IntoIterator for &'a StringWrapper<'b> {
    |              ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:159:22
    |
159 |     where &'a Iter1: IntoIterator<Item=Elem1>,
    |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:160:22
    |
160 |           &'b Iter2: IntoIterator<Item=Elem2>,
    |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `PartialEq` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:161:18
    |
161 |           Elem1: PartialEq<Elem2> {
    |                  ^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:201:22
    |
201 |     where &'a Iter1: IntoIterator<Item=Elem1>,
    |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `IntoIterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:202:22
    |
202 |           &'b Iter2: IntoIterator<Item=Elem2>,
    |                      ^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `PartialEq` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:203:18
    |
203 |           Elem1: PartialEq<Elem2> {
    |                  ^^^^^^^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:208:20
    |
208 |     let mut cache: Vec<usize> = (1..b_len+1).collect();
    |                    ^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:274:33
    |
274 |     let mut prev_two_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                                 ^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:275:29
    |
275 |     let mut prev_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                             ^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:276:29
    |
276 |     let mut curr_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                             ^^^ not found in this scope

error[E0405]: cannot find trait `Eq` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:328:17
    |
328 |     where Elem: Eq + Hash + Clone {
    |                 ^^ not found in this scope

error[E0405]: cannot find trait `Clone` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:328:29
    |
328 |     where Elem: Eq + Hash + Clone {
    |                             ^^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:357:17
    |
357 |                 Some(&value) => value,
    |                 ^^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:391:18
    |
391 |     let (x, y): (Vec<_>, Vec<_>) = (a.chars().collect(), b.chars().collect());
    |                  ^^^ not found in this scope

error[E0412]: cannot find type `Vec` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:391:26
    |
391 |     let (x, y): (Vec<_>, Vec<_>) = (a.chars().collect(), b.chars().collect());
    |                          ^^^ not found in this scope

error[E0405]: cannot find trait `Iterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:415:29
    |
415 | fn bigrams(s: &str) -> impl Iterator<Item=(char, char)> + '_ {
    |                             ^^^^^^^^ not found in this scope

error[E0412]: cannot find type `String` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:437:12
    |
437 |     let a: String = a.chars().filter(|&x| !char::is_whitespace(x)).collect();
    |            ^^^^^^ not found in this scope

error[E0412]: cannot find type `String` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:438:12
    |
438 |     let b: String = b.chars().filter(|&x| !char::is_whitespace(x)).collect();
    |            ^^^^^^ not found in this scope

error[E0433]: failed to resolve: use of undeclared type `Vec`
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:84:26
   |
84 |     let mut b_consumed = Vec::with_capacity(b_len);
   |                          ^^^ use of undeclared type `Vec`

error[E0433]: failed to resolve: use of undeclared type `Vec`
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:274:46
    |
274 |     let mut prev_two_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                                              ^^^ use of undeclared type `Vec`

error[E0433]: failed to resolve: use of undeclared type `Vec`
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:275:42
    |
275 |     let mut prev_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                                          ^^^ use of undeclared type `Vec`

error[E0433]: failed to resolve: use of undeclared type `Vec`
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:276:42
    |
276 |     let mut curr_distances: Vec<usize> = Vec::with_capacity(b_len + 1);
    |                                          ^^^ use of undeclared type `Vec`

error[E0425]: cannot find function, tuple struct or tuple variant `Ok` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:43:36
   |
43 |             (None, None) => return Ok(count),
   |                                    ^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Err` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/strsim-0.10.0/src/lib.rs:44:25
   |
44 |             _ => return Err(StrSimError::DifferentLengthArgs),
   |                         ^^^ not found in this scope

Some errors have detailed explanations: E0405, E0412, E0416, E0425, E0433, E0463, E0531.
For more information about an error, try `rustc --explain E0405`.
error: could not compile `strsim` (lib) due to 40 previous errors
error[E0463]: can't find crate for `std`
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:247:6
    |
247 | impl std::error::Error for ParseError {}
    |      ^^^ can't find crate
    |
    = note: the `aarch64-apple-darwin` target may not be installed
    = help: consider downloading the target with `rustup target add aarch64-apple-darwin`
    = help: consider building the standard library from source with `cargo build -Zbuild-std`

error[E0405]: cannot find trait `Iterator` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:38:16
   |
38 | impl<B: Flags> Iterator for Iter<B> {
   |                ^^^^^^^^ not found in this scope

error[E0412]: cannot find type `Option` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:41:27
   |
41 |     fn next(&mut self) -> Option<Self::Item> {
   |                           ^^^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:43:13
   |
43 |             Some((_, flag)) => Some(flag),
   |             ^^^^ not found in this scope

error[E0405]: cannot find trait `Iterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:107:16
    |
107 | impl<B: Flags> Iterator for IterNames<B> {
    |                ^^^^^^^^ not found in this scope

error[E0412]: cannot find type `Option` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:110:27
    |
110 |     fn next(&mut self) -> Option<Self::Item> {
    |                           ^^^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:111:19
    |
111 |         while let Some(flag) = self.flags.get(self.idx) {
    |                   ^^^^ not found in this scope

error[E0425]: cannot find value `None` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:114:24
    |
114 |                 return None;
    |                        ^^^^ not found in this scope

error[E0425]: cannot find value `None` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:143:9
    |
143 |         None
    |         ^^^^ not found in this scope

error[E0412]: cannot find type `Result` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:42:66
   |
42 | pub fn to_writer<B: Flags>(flags: &B, mut writer: impl Write) -> Result<(), fmt::Error>
   |                                                                  ^^^^^^ not found in this scope

error[E0412]: cannot find type `Result` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:97:43
   |
97 | pub fn from_str<B: Flags>(input: &str) -> Result<B, ParseError>
   |                                           ^^^^^^ not found in this scope

error[E0531]: cannot find tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:118:34
    |
118 |         let parsed_flag = if let Some(flag) = flag.strip_prefix("0x") {
    |                                  ^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:154:15
    |
154 |         Self: Sized;
    |               ^^^^^ not found in this scope

error[E0412]: cannot find type `Result` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:152:34
    |
152 |     fn parse_hex(input: &str) -> Result<Self, ParseError>
    |                                  ^^^^^^ not found in this scope

error[E0412]: cannot find type `String` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:169:14
    |
169 |         got: String,
    |              ^^^^^^ not found in this scope

error[E0412]: cannot find type `String` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:175:14
    |
175 |         got: String,
    |              ^^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:131:18
    |
131 | pub trait Flags: Sized + 'static {
    |                  ^^^^^ not found in this scope

error[E0412]: cannot find type `Option` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:162:39
    |
162 |     fn from_bits(bits: Self::Bits) -> Option<Self> {
    |                                       ^^^^^^ not found in this scope

error[E0425]: cannot find value `None` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:168:13
    |
168 |             None
    |             ^^^^ not found in this scope

error[E0412]: cannot find type `Option` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:184:33
    |
184 |     fn from_name(name: &str) -> Option<Self> {
    |                                 ^^^^^^ not found in this scope

error[E0425]: cannot find value `None` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:187:20
    |
187 |             return None;
    |                    ^^^^ not found in this scope

error[E0425]: cannot find value `None` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:196:9
    |
196 |         None
    |         ^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:230:15
    |
230 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:238:15
    |
238 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:246:15
    |
246 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:257:15
    |
257 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:265:15
    |
265 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:273:15
    |
273 |         Self: Sized,
    |               ^^^^^ not found in this scope

error[E0405]: cannot find trait `Clone` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:320:5
    |
320 |     Clone
    |     ^^^^^ not found in this scope

error[E0405]: cannot find trait `Copy` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:321:7
    |
321 |     + Copy
    |       ^^^^ not found in this scope

error[E0405]: cannot find trait `PartialEq` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:322:7
    |
322 |     + PartialEq
    |       ^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `Sized` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:327:7
    |
327 |     + Sized
    |       ^^^^^ not found in this scope

error[E0412]: cannot find type `Result` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:355:46
    |
355 |                   fn parse_hex(input: &str) -> Result<Self, ParseError> {
    |                                                ^^^^^^ not found in this scope
...
384 | / impl_bits! {
385 | |     u8, i8,
386 | |     u16, i16,
387 | |     u32, i32,
...   |
390 | |     usize, isize,
391 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `impl_bits` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0412]: cannot find type `Result` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:361:46
    |
361 |                   fn parse_hex(input: &str) -> Result<Self, ParseError> {
    |                                                ^^^^^^ not found in this scope
...
384 | / impl_bits! {
385 | |     u8, i8,
386 | |     u16, i16,
387 | |     u32, i32,
...   |
390 | |     usize, isize,
391 | | }
    | |_- in this macro invocation
    |
    = note: this error originates in the macro `impl_bits` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0405]: cannot find trait `Iterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:407:16
    |
407 |     type Iter: Iterator<Item = Self>;
    |                ^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `Iterator` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:410:21
    |
410 |     type IterNames: Iterator<Item = (&'static str, Self)>;
    |                     ^^^^^^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Some` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:43:32
   |
43 |             Some((_, flag)) => Some(flag),
   |                                ^^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Some` in this scope
  --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:51:21
   |
51 |                     Some(B::from_bits_retain(self.inner.remaining.bits()))
   |                     ^^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/iter.rs:139:24
    |
139 |                 return Some((flag.name(), B::from_bits_retain(bits)));
    |                        ^^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Ok` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:105:16
    |
105 |         return Ok(parsed_flags);
    |                ^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Err` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:113:20
    |
113 |             return Err(ParseError::empty_flag());
    |                    ^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Ok` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:134:5
    |
134 |     Ok(parsed_flags)
    |     ^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Ok` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/parser.rs:242:9
    |
242 |         Ok(())
    |         ^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:166:13
    |
166 |             Some(truncated)
    |             ^^^^ not found in this scope

error[E0425]: cannot find function, tuple struct or tuple variant `Some` in this scope
   --> /Users/yarrow/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.4.1/src/traits.rs:192:24
    |
192 |                 return Some(Self::from_bits_retain(flag.value().bits()));
    |                        ^^^^ not found in this scope

Some errors have detailed explanations: E0405, E0412, E0425, E0463, E0531.
error: could not compile `bitflags` (lib) due to 58 previous errors

[willcrichton]

Hi @yarrow, thanks for the report. I believe this is a fundamental limitation to using code that links against the compiler via #![feature(rustc_private)]. It's the same reason I can't yet produce Flowistry binaries for ARM -- GitHub does not offer ARM runners. I don't believe there's any way to cross-compile rustc_private code at the moment, but I will update this thread if that changes.

[yarrow]

Thanks! I've checked, and Flowistry does work if I create a .cargo/config.toml file in a project where I want to use it, with:

[build]
target = "x86_64-apple-darwin"

(overriding the global target = "aarch64-apple-darwin" in my ~/.cargo/config.toml

[willcrichton]

Wait sorry -- are you trying to use x86-compiled Flowistry? Or are you trying to use ARM-compiled Flowistry on x86-targeted code?

I just tried cross-compiling Flowistry on my laptop and still got an error:

$ rustup toolchain install nightly-2023-08-25 -c rust-src rustc-dev llvm-tools-preview miri --target x86_64-apple-darwin
<works fine>
$ cargo build --release --target x86_64-apple-darwin
<snip>
error[E0463]: can't find crate for `rustc_driver`
 --> /Users/will/.cargo/registry/src/index.crates.io-6f17d22bba15001f/indexical-0.3.1/src/impls/rustc.rs:1:1
  |
1 | extern crate rustc_driver;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate

[yarrow]

Flowistry works in Rosetta mode if I compile my project for x86 and use x86-compiled Flowistry with the x86-compiled rustc.

(I usually use the x86 rustc in Rosetta mode with an aarch64-apple-darwin target — I want to use a Tier 1 compiler but produce binaries that run faster on my machine.)