So I've build the following fat binary
➜ wallet-core git:(m/rust_fix) ✗ lipo -detailed_info build/local/catalyst/libwallet_core_rs.a
Fat header in: build/local/catalyst/libwallet_core_rs.a
fat_magic 0xcafebabe
nfat_arch 2
architecture x86_64
cputype CPU_TYPE_X86_64
cpusubtype CPU_SUBTYPE_X86_64_ALL
capabilities 0x0
offset 48
size 1038808
align 2^3 (8)
architecture arm64
cputype CPU_TYPE_ARM64
cpusubtype CPU_SUBTYPE_ARM64_ALL
capabilities 0x0
offset 1038856
size 2649760
align 2^3 (8)
Using the tutorial https://nadim.computer/posts/2022-02-11-maccatalyst.html
and use xcodebuild to build a xcframework from different fat libs in order to create a universal framework:
#!/bin/bash
set -e
TARGET_NAME="libwallet_core_rs.a"
TARGET_XCFRAMEWORK_NAME=../swift/WalletCoreRs.xcframework
BUILD_FOLDER=../build/local
CRATE="wallet-core-rs"
HEADER_NAME="WalletCoreRSBindgen.h"
create_xc_framework() {
rm -rf $TARGET_XCFRAMEWORK_NAME
xcodebuild -create-xcframework -library $BUILD_FOLDER/$TARGET_NAME -library $BUILD_FOLDER/darwin_universal/$TARGET_NAME -library $BUILD_FOLDER/aarch64-apple-ios/release/$TARGET_NAME -library $BUILD_FOLDER/catalyst/$TARGET_NAME -output $TARGET_XCFRAMEWORK_NAME
}
cd rust
echo "Generating Native targets"
CARGO_TARGET_DIR=$BUILD_FOLDER/ cargo build --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target wasm32-unknown-emscripten --release
if [[ `uname` == "Darwin" ]]; then
echo "Generating Android targets"
CARGO_TARGET_DIR=$BUILD_FOLDER/ cargo build --target aarch64-linux-android --release
CARGO_TARGET_DIR=$BUILD_FOLDER/ cargo build --target armv7-linux-androideabi --release
CARGO_TARGET_DIR=$BUILD_FOLDER/ cargo build --target x86_64-linux-android --release
CARGO_TARGET_DIR=$BUILD_FOLDER/ cargo build --target i686-linux-android --release
echo "Generating iOS targets"
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target aarch64-apple-ios --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target aarch64-apple-ios-sim --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target x86_64-apple-ios --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target aarch64-apple-darwin --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo build --target x86_64-apple-darwin --release
CARGO_TARGET_DIR=$BUILD_FOLDER cargo +nightly build -Z build-std --target aarch64-apple-ios-macabi --release --lib
CARGO_TARGET_DIR=$BUILD_FOLDER cargo +nightly build -Z build-std --target x86_64-apple-ios-macabi --release --lib
lipo $BUILD_FOLDER/x86_64-apple-ios/release/$TARGET_NAME $BUILD_FOLDER/aarch64-apple-ios-sim/release/$TARGET_NAME -create -output $BUILD_FOLDER/$TARGET_NAME
mkdir -p $BUILD_FOLDER/darwin_universal
lipo $BUILD_FOLDER/x86_64-apple-darwin/release/$TARGET_NAME $BUILD_FOLDER/aarch64-apple-darwin/release/$TARGET_NAME -create -output $BUILD_FOLDER/darwin_universal/$TARGET_NAME
mkdir -p $BUILD_FOLDER/catalyst
lipo $BUILD_FOLDER/aarch64-apple-ios-macabi/release/$TARGET_NAME $BUILD_FOLDER/x86_64-apple-ios-macabi/release/$TARGET_NAME -create -output $BUILD_FOLDER/catalyst/$TARGET_NAME
create_xc_framework
fi
cbindgen --crate $CRATE --output ../src/rust/bindgen/$HEADER_NAME
cd -
cp build/local/release/${TARGET_NAME} build/local/lib/
Everything was working fine until XCode 14.2 start to spit out this spurious error:
error: unable to determine the platform for the given binary '$HOME/Documents/C++/wallet-core/build/local/catalyst/libwallet_core_rs.a'; check your deployment version settings
lipo tells me that the build/local/catalyst/libwallet_core_rs.a
is perfectly valid fat binary.
That's what gives rustc spec info about the aarch64 target:
➜ wallet-core git:(m/rust_fix) ✗ rustc -Z unstable-options --target=aarch64-apple-ios-macabi --print target-spec-json | jq
{
"abi": "macabi",
"abi-return-struct-as-int": true,
"arch": "aarch64",
"archive-format": "darwin",
"bitcode-llvm-cmdline": "-triple\u0000arm64-apple-ios-macabi\u0000-emit-obj\u0000-disable-llvm-passes\u0000-Os\u0000",
"cpu": "apple-a12",
"data-layout": "e-m:o-i64:64-i128:128-n32:64-S128",
"debuginfo-kind": "dwarf-dsym",
"default-dwarf-version": 2,
"dll-suffix": ".dylib",
"dynamic-linking": true,
"eh-frame-header": false,
"emit-debug-gdb-scripts": false,
"features": "+neon,+fp-armv8,+apple-a12",
"forces-embed-bitcode": true,
"frame-pointer": "non-leaf",
"function-sections": false,
"has-rpath": true,
"is-builtin": true,
"is-like-osx": true,
"link-env": [
"ZERO_AR_DATE=1"
],
"link-env-remove": [
"IPHONEOS_DEPLOYMENT_TARGET"
],
"linker-is-gnu": false,
"lld-flavor": "darwin",
"llvm-target": "arm64-apple-ios-macabi",
"max-atomic-width": 128,
"os": "ios",
"pre-link-args": {
"gcc": [
"-target",
"arm64-apple-ios-macabi"
],
"ld": [
"-arch",
"arm64",
"-platform_version",
"mac-catalyst",
"7.0",
"7.0"
],
"ld64.lld": [
"-arch",
"arm64",
"-platform_version",
"mac-catalyst",
"7.0",
"7.0"
]
},
"split-debuginfo": "packed",
"supported-split-debuginfo": [
"packed",
"unpacked",
"off"
],
"target-family": [
"unix"
],
"target-pointer-width": "64",
"vendor": "apple"
}
Everything outside of catalyst works well, but I wonder how to fix this error if anyone encountered it.