Make fails when attempting to compile for various Apple & iOS targets

[AdamCampbell]

I am trying to follow this guide
It's a little outdated but I have checked out repo in order to manually compile for these targets.

I have run:

configure --target=armv7-apple-ios,armv7s-apple-ios,i386-apple-ios,aarch64-apple-ios,x86_64-apple-ios --prefix=$HOME/rustc-ios
make -j8 && make install

However I think the ordering in the makefile is wrong as it tries to run an install.sh that does not exist.

rust-compile-log.txt
Log of failed installation is attached with the main issue being:

Install std stage2 (armv7-apple-ios)
sh: /Users/adam/Development/rust/build/build/tmp/dist/rust-std-1.19.0-dev-armv7-apple-ios/install.sh: No such file or directory

[kennytm]

rustbuild refers to the install.sh thing in https://github.com/rust-lang/rust/blob/0ed1ec9f9e/src/bootstrap/install.rs#L92.

---

[Not about the bug] Nowadays you don't need to build a cross-compiler from source yourself. rustup is enough to setup everything for iOS (and Android) development. The whole "Installing Rust with multirust" should be replaced by "Install rustup."

curl https://sh.rustup.rs -sSf | sh

and the whole "Building a Cross Compiler" should be replaced by

rustup target add aarch64-apple-ios 
rustup target add armv7-apple-ios 
rustup target add armv7s-apple-ios 
rustup target add x86_64-apple-ios 
rustup target add i386-apple-ios

then go on from "Hello, World: Building the Rust Library" (but ignore the multirust override ios step).

cc @jgallagher

[AdamCampbell]

Oh awesome thanks @kennytm that should make things much easier.
May as well leave this issue open for now, don't know if this compilation log represents a compiler error or user error now since so much has changed.

[piaojin]

@kennytm

curl https://sh.rustup.rs -sSf | sh
and the whole "Building a Cross Compiler" should be replaced by

rustup target add aarch64-apple-ios 
rustup target add armv7-apple-ios 
rustup target add armv7s-apple-ios 
rustup target add x86_64-apple-ios 
rustup target add i386-apple-ios

work for me, thanks!

[ppamorim]

I am getting component 'rust-std' for target 'i386-apple-ios' is unavailable for download for channel stable when running the commands above, only the target aarch64-apple-ios and rustup target add x86_64-apple-ios work.

[kennytm]

@ppamorim All 32-bit Apple targets have been removed since 1.42.0. You could just leave those targets out. See https://blog.rust-lang.org/2020/01/03/reducing-support-for-32-bit-apple-targets.html for details.