使用 go build 为 Iphone 模拟器构建静态库

#!/bin/sh

# go/clangwrap.sh

sdk_path=`xcrun --sdk $sdk --show-sdk-path`
clang=`xcrun --sdk $sdk --find clang`

if [ "$goarch" == "amd64" ]; then
    carch="x86_64"
elif [ "$goarch" == "arm64" ]; then
    carch="arm64"
fi

exec $clang -arch $carch -isysroot $sdk_path -mios-version-min=10.0 "$@"

building for iOS Simulator, but linking in object file built for iOS ... for architecture arm64

#!/bin/sh
export goos=ios
export goarch=arm64
export cgo_enabled=1
export sdk=iphonesimulator
export cgo_cflags="-fembed-bitcode"
export min_version=15

. ./target.sh

export cgo_ldflags="-target ${target} -syslibroot \"${sdk_path}\""
cc="$(pwd)/clangwrap.sh"
export cc

go build -buildmode=c-archive -o libuplink.a

#!/bin/sh

sdk_path=$(xcrun --sdk "$sdk" --show-sdk-path)
export sdk_path

if [ "$goarch" = "amd64" ]; then
    carch="x86_64"
elif [ "$goarch" = "arm64" ]; then
    carch="arm64"
fi

if [ "$sdk" = "iphoneos" ]; then
  export target="$carch-apple-ios$min_version"
elif [ "$sdk" = "iphonesimulator" ]; then
  export target="$carch-apple-ios$min_version-simulator"
fi

#!/bin/zsh

clang=$(xcrun --sdk "$sdk" --find clang)

exec "$clang" -target "$target" -isysroot "$sdk_path" "$@"

otool -l libuplink.a

...
load command 1
      cmd lc_build_version
  cmdsize 24
 platform 7
    minos 15.0
      sdk 16.2
...

/* known values for the above platform field. */
#define platform_unknown 0
#define platform_any 0xffffff
#define platform_macos 1
#define platform_ios 2
#define platform_tvos 3
#define platform_watchos 4
#define platform_bridgeos 5
#define platform_maccatalyst 6
#define platform_iossimulator 7
#define platform_tvossimulator 8
#define platform_watchossimulator 9
#define platform_driverkit 10

cat `xcrun --sdk iphonesimulator --show-sdk-path`/usr/include/mach-o/loader.h

export sdk=iphoneos

...
Load command 1
      cmd LC_BUILD_VERSION
  cmdsize 24
 platform 2
    minos 15.0
      sdk 16.2
   ntools 0
...