surpher · July 17, 2025 12:48 · Apr 25, 2024 · Aug 5, 2023 · Aug 12, 2022 · Aug 9, 2021
diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -4,7 +4,9 @@ Example of an automated script that does most of this: https://github.com/surphe
 
 ## Install Rust
 
-  curl https://sh.rustup.rs -sSf | sh
+```shell
+curl https://sh.rustup.rs -sSf | sh
+```
 
 ## List available architecture targets
 

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -101,6 +101,10 @@ cargo build --target=aarch64-apple-darwin --release
 cp ../target/arm64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS-arm64/lipact_mock_server.a
 ```
 
+### Mac Catalyst
+
+https://nadim.computer/posts/2022-02-11-maccatalyst.html
+
 ## List architectures in .a file
 
 `lipo -info libpact_mock_server.a`

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -127,6 +127,13 @@ For a fat lib, start by having `cargo` build the Rust code separately for each a
 cargo +nightly build -Z build-std --target aarch64-apple-ios-sim
 ```
 
+## On Linux
+
+```shell
+curll --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+apt-get install protobuf-compiler
+```
+
 [https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/](https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/)
 
 ## Resources

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -121,7 +121,11 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
-## M1 stuff
+## iOS on M1
+
+```shell
+cargo +nightly build -Z build-std --target aarch64-apple-ios-sim
+```
 
 [https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/](https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/)
 

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -1,4 +1,6 @@
-# Dealing with Rust to build PactSwift
+# Dealing with Rust to build PactSwiftMockServer
+
+Example of an automated script that does most of this: https://github.com/surpher/PactSwiftMockServer/blob/fb8148866bb05f49a0b1dcaae66c67bad1e7eca7/Support/build_rust_dependencies
 
 ## Install Rust
 

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -14,7 +14,9 @@ rustup target list
 
 ```  
 rustup target add aarch64-apple-ios aarch64-apple-darwin x86_64-apple-ios x86_64-apple-darwin
-rustup component add rust-src --toolchain nightly-x86_64-apple-darwin
+
+# While arm64-apple-ios-sim is still in Tier 3:
+rustup component add rust-src --toolchain nightly-x86_64-apple-darwin 
 ```
 
 ## Install other toolchains

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -62,7 +62,7 @@ crate-type = ["staticlib", "cdylib"]
 
 ## Build binaries
 
-### Universal iOS
+### Universal iOS (arm64 mobile device + x86_64 simulator)
 
 ```
 cargo lipo --release
@@ -83,11 +83,18 @@ cargo +nightly build -Z build-std --target aarch64-apple-ios-sim --release
 cp ../target/arm64-apple-ios-sim/release/libpact_mock_server.a /path/to/PactSwift/Resources/arm64iOSsim/libpact_mock_server.a
 ```
 
-### macOS 
+### macOS x86_64
 
 ```
 cargo build --targget=x86_64-apple-darwin --release
-cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS/lipact_mock_server.a
+cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS-x86_64/lipact_mock_server.a
+```
+
+### macOS arm64
+
+```
+cargo build --target=aarch64-apple-darwin --release
+cp ../target/arm64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS-arm64/lipact_mock_server.a
 ```
 
 ## List architectures in .a file

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -14,6 +14,7 @@ rustup target list
 
 ```  
 rustup target add aarch64-apple-ios aarch64-apple-darwin x86_64-apple-ios x86_64-apple-darwin
+rustup component add rust-src --toolchain nightly-x86_64-apple-darwin
 ```
 
 ## Install other toolchains
@@ -68,13 +69,20 @@ cargo lipo --release
 cp ../target/universal/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
 ```
 
-### iOS Simulator
+### iOS Simulator x86_64
 
 ```
 cargo build --target=x86_64-apple-ios --release
 cp ../target/x86_64-apple-ios/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
 ```
 
+### iOS Simulator arm64
+
+```
+cargo +nightly build -Z build-std --target aarch64-apple-ios-sim --release
+cp ../target/arm64-apple-ios-sim/release/libpact_mock_server.a /path/to/PactSwift/Resources/arm64iOSsim/libpact_mock_server.a
+```
+
 ### macOS 
 
 ```

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -102,6 +102,10 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
+## M1 stuff
+
+[https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/](https://blog.mozilla.org/data/2021/04/16/this-week-in-glean-rustc-ios-and-an-m1/)
+
 ## Resources
 - https://nachbaur.com/2019/03/22/working-with-multiple-architectures/
 - https://doc.rust-lang.org/edition-guide/rust-2018/rustup-for-managing-rust-versions.html

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -1,3 +1,5 @@
+# Dealing with Rust to build PactSwift
+
 ## Install Rust
 
   curl https://sh.rustup.rs -sSf | sh
@@ -53,6 +55,10 @@ name = "pact_mock_server"
 crate-type = ["staticlib", "cdylib"]
 ```
 
+## Cross compiling
+
+[https://github.com/japaric/rust-cross](https://github.com/japaric/rust-cross)
+
 ## Build binaries
 
 ### Universal iOS

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -11,7 +11,7 @@ rustup target list
 ## Add arch targets
 
 ```  
-rustup target add aarch64-apple-ios x86_64-apple-ios x86_64-apple-darwin
+rustup target add aarch64-apple-ios aarch64-apple-darwin x86_64-apple-ios x86_64-apple-darwin
 ```
 
 ## Install other toolchains

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -97,6 +97,7 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
 ## Resources
+- https://nachbaur.com/2019/03/22/working-with-multiple-architectures/
 - https://doc.rust-lang.org/edition-guide/rust-2018/rustup-for-managing-rust-versions.html
 - https://github.com/guedou/cargo-strip
 - https://github.com/johnthagen/min-sized-rust (Minimize size of rust lib)

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -2,6 +2,12 @@
 
   curl https://sh.rustup.rs -sSf | sh
 
+## List available architecture targets
+
+```
+rustup target list
+```
+
 ## Add arch targets
 
 ```  

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -91,6 +91,8 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
 ## Resources
+- https://doc.rust-lang.org/edition-guide/rust-2018/rustup-for-managing-rust-versions.html
+- https://github.com/guedou/cargo-strip
 - https://github.com/johnthagen/min-sized-rust (Minimize size of rust lib)
 - https://users.rust-lang.org/t/unable-to-build-a-dynamic-library-dylib-for-ios/24918/4 (building and using dynamic libs for development purposes - would be it enough for PactSwift? It shouldn't be embedded in the release app anyway!)
 - https://visly.app/blog/rust-on-ios

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -8,6 +8,12 @@
 rustup target add aarch64-apple-ios x86_64-apple-ios x86_64-apple-darwin
 ```
 
+## Install other toolchains
+
+`rustup toolchain install nightly`
+
+more: https://doc.rust-lang.org/edition-guide/rust-2018/rustup-for-managing-rust-versions.html
+
 ## Install more tools to help with the build
 
 `cargo-lipo` - a tool for building universal iOS binaries, 
@@ -85,6 +91,7 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
 ## Resources
+- https://github.com/johnthagen/min-sized-rust (Minimize size of rust lib)
 - https://users.rust-lang.org/t/unable-to-build-a-dynamic-library-dylib-for-ios/24918/4 (building and using dynamic libs for development purposes - would be it enough for PactSwift? It shouldn't be embedded in the release app anyway!)
 - https://visly.app/blog/rust-on-ios
 - https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -85,6 +85,7 @@ lipo -create foo-arm64.a foo-x86_64.a -output foo.a
 For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
 
 ## Resources
+- https://users.rust-lang.org/t/unable-to-build-a-dynamic-library-dylib-for-ios/24918/4 (building and using dynamic libs for development purposes - would be it enough for PactSwift? It shouldn't be embedded in the release app anyway!)
 - https://visly.app/blog/rust-on-ios
 - https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2
 - https://www.reddit.com/r/rust/comments/aae6x8/rust_ios_and_linking_against_fat_native_libraries/
diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -68,6 +68,23 @@ cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwif
 
 `lipo -info libpact_mock_server.a`
 
+## Extract one of the architectures from a fat library using the lipo command:
+
+```
+lipo libfoo.a -thin arm64 -output libfoo-arm64.a
+```
+
+Use `-thin` and not `-extract` the latter, still outputs a fat file, one which happens to only contain a single architecture.
+
+## Combine multiple architectures into one fat library
+
+```
+lipo -create foo-arm64.a foo-x86_64.a -output foo.a
+```
+
+For a fat lib, start by having `cargo` build the Rust code separately for each architecture. use `lipo` to combine the outputs into a fat binary.
+
 ## Resources
 - https://visly.app/blog/rust-on-ios
-- https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2
+- https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2
+- https://www.reddit.com/r/rust/comments/aae6x8/rust_ios_and_linking_against_fat_native_libraries/
diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -64,6 +64,10 @@ cargo build --targget=x86_64-apple-darwin --release
 cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS/lipact_mock_server.a
 ```
 
+## List architectures in .a file
+
+`lipo -info libpact_mock_server.a`
+
 ## Resources
 - https://visly.app/blog/rust-on-ios
 - https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2
diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -4,50 +4,65 @@
 
 ## Add arch targets
 
-  rustup target add aarch64-apple-ios x86_64-apple-ios x86_64-apple-darwin
+```  
+rustup target add aarch64-apple-ios x86_64-apple-ios x86_64-apple-darwin
+```
 
 ## Install more tools to help with the build
 
 `cargo-lipo` - a tool for building universal iOS binaries, 
 `cbindgen` - a tool for generating C headers from rust
 
-  cargo install cargo-lipo
-  cargo install cbindgen
+```
+cargo install cargo-lipo
+cargo install cbindgen
+```
 
 ## Generate the header file
 
-  cd pact-reference/rust/pact_mock_server_ffi
-  cbindgen src/lib.rs -l c > pact_mock_server.h
-  cp pact_mock_server.h ../PactSwift/Sources/Headers/pact_mock_server.h
+```
+cd pact-reference/rust/pact_mock_server_ffi
+cbindgen src/lib.rs -l c > pact_mock_server.h
+cp pact_mock_server.h ../PactSwift/Sources/Headers/pact_mock_server.h
+```
 
 ## Define the type of binary
 
-  cd pact-reference/rust/pact_mock_server_ffi
-  nano Cargo.toml
+```
+cd pact-reference/rust/pact_mock_server_ffi
+nano Cargo.toml
+```
 
 Set the following:
 
-  [lib]
-  name = "pact_mock_server"
-  crate-type = ["staticlib", "cdylib"]
+```
+[lib]
+name = "pact_mock_server"
+crate-type = ["staticlib", "cdylib"]
+```
 
 ## Build binaries
 
 ### Universal iOS
 
-  cargo lipo --release
-   cp ../target/universal/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
-
+```
+cargo lipo --release
+cp ../target/universal/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
+```
+
 ### iOS Simulator
 
-  cargo build --target=x86_64-apple-ios --release
-  cp ../target/x86_64-apple-ios/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
-
+```
+cargo build --target=x86_64-apple-ios --release
+cp ../target/x86_64-apple-ios/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
+```
+
 ### macOS 
-
-  cargo build --targget=x86_64-apple-darwin --release
-    cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS/lipact_mock_server.a
-
+
+```
+cargo build --targget=x86_64-apple-darwin --release
+cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS/lipact_mock_server.a
+```
 
 ## Resources
 - https://visly.app/blog/rust-on-ios

diff --git a/rust_to_swift.md b/rust_to_swift.md
@@ -0,0 +1,54 @@
+## Install Rust
+
+  curl https://sh.rustup.rs -sSf | sh
+
+## Add arch targets
+
+  rustup target add aarch64-apple-ios x86_64-apple-ios x86_64-apple-darwin
+
+## Install more tools to help with the build
+
+`cargo-lipo` - a tool for building universal iOS binaries, 
+`cbindgen` - a tool for generating C headers from rust
+
+  cargo install cargo-lipo
+  cargo install cbindgen
+
+## Generate the header file
+
+  cd pact-reference/rust/pact_mock_server_ffi
+  cbindgen src/lib.rs -l c > pact_mock_server.h
+  cp pact_mock_server.h ../PactSwift/Sources/Headers/pact_mock_server.h
+
+## Define the type of binary
+
+  cd pact-reference/rust/pact_mock_server_ffi
+  nano Cargo.toml
+
+Set the following:
+
+  [lib]
+  name = "pact_mock_server"
+  crate-type = ["staticlib", "cdylib"]
+
+## Build binaries
+
+### Universal iOS
+
+  cargo lipo --release
+   cp ../target/universal/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
+
+### iOS Simulator
+
+  cargo build --target=x86_64-apple-ios --release
+  cp ../target/x86_64-apple-ios/release/libpact_mock_server.a /path/to/PactSwift/Resources/iOS/lipact_mock_server.a
+
+### macOS 
+
+  cargo build --targget=x86_64-apple-darwin --release
+    cp ../target/x86_64-apple-darwin/release/libpact_mock_server.a /path/to/PactSwift/Resources/macOS/lipact_mock_server.a
+
+
+## Resources
+- https://visly.app/blog/rust-on-ios
+- https://medium.com/flutter-community/using-ffi-on-flutter-plugins-to-run-native-rust-code-d64c0f14f9c2
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