First build ergo-lib-c:

cargo build --release --features rest --features mnemonic_gen -p ergo-lib-c

adding:

• --target x86_64-apple-ios for iPhone simulator on Intel macs,
• --target aarch64-apple-ios for iPhone on Apple silicon macs,
• --target aarch64-apple-ios-sim for iPhone simulator on Apple silicon macs.

To install a target run rustup target add <target> using triple for target from the list above.

This creates a static library under <project_root_directory>/target/release. Next we use cbindgen to generate C-headers. Important: we need a nightly version of rustc for this step, as we use macros to generate *portions of the C-bindings. cbindgen can't 'see' through the macros so the nightly compiler is used to expand the macros before cbindgen passes over the code.

cd bindings/ergo-lib-c
rustup override set nightly
cbindgen --config cbindgen.toml --crate ergo-lib-c --output h/ergo_lib.h
rustup override set stable

To build this project we need to point swift to this directory for linking.

cd ../ergo-lib-ios
swift build -Xlinker -L../../target/release/

To run tests we must also pass in the library directory:

swift test -Xlinker -L../../target/release/ --skip RestNodeApiTests --skip RestNodeApiIntegrationTests

The RestNodeApiTests assume you have an ergo node running on localhost.

Make sure ergo-lib-c is built as described above.

Starting at the root of the sigma-rust repository, type:

cd bindings/ergo-lib-ios
swift package generate-xcodeproj
xcodebuild -project ./ErgoLib.xcodeproj -xcconfig ./Config/iPhoneSimulator_{arm|intel}.xcconfig -sdk iphonesimulator

choosing either arm or intel in the last line depending on your mac's architecture.

Then double click ErgoLib.xcodeproj which opens Xcode. You need to manually point the linker towards the directory where the ergo-lib static library resides. Refer to the following image:

Set Other Linker Flags to be -L/absolute/path/to/sigma-rust/target/release for x86_64 and -L/absolute/path/to/sigma-rust/target/aarch64-apple-ios-sim/release for simulator on Apple silicon macs. The project can now be built.

First we need to build an ARM64 target for ergo-lib-c:

rustup target add aarch64-apple-ios
cargo build --release --target=aarch64-apple-ios -p ergo-lib-c

Next starting at the root of the sigma-rust repository, type:

cd bindings/ergo-lib-ios
swift package generate-xcodeproj
xcodebuild -project ./ErgoLib.xcodeproj -xcconfig ./Config/iPhoneOS.xcconfig -sdk iphoneos

Next navigate in Xcode to Build Settings as indicated by 1 and 2 in the picture below. Set the fields Base SDK, Excluded Architecture and Supported Platforms exactly as pictured by 3 and 4.

Then set Other Linker Flags to be -L/absolute/path/to/sigma-rust/aarch64-apple-ios/release. Finally we can build the project.