为 iOS 编译 Golang 包使用 CGO 导入失败，stdio.h:107:15：致命错误：找不到“stdio.h”文件

如何解决为 iOS 编译 Golang 包使用 CGO 导入失败，stdio.h:107:15：致命错误：找不到“stdio.h”文件

我正在尝试将 Golang 包编译为适用于 iOS 的 c 存档。我在 main.go 中有以下最少的演示代码：

package main

import (
    "fmt"
    //_ "github.com/anacrolix/go-libutp"
)

func main() {
    fmt.Println("Hello World")
}

我使用以下 shell 脚本为 iOS 构建：

#!/bin/bash
DEVELOPER_DIR=`xcode-select --print-path`
IOS_MIN_VERSION="11.0"

IPHONEOS_SDK_VERSION=`xcodebuild -version -sdk | grep -A 1 '^iPhoneOS' | tail -n 1 |  awk '{ print $2 }'`
IPHONEOS_SDK_PATH="$DEVELOPER_DIR/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS$IPHONEOS_SDK_VERSION.sdk"

build_ios_arm64() {
    export CC=`xcrun -find clang`
    export CXX=`xcrun -find clang++`

    export CGO_ENABLED=1
    export GOOS=darwin
    export GOARCH=arm64
    export CGO_CFLAGS="-isysroot $IPHONEOS_SDK_PATH -arch arm64 -miphoneos-version-min=$IOS_MIN_VERSION"
    export CGO_LDFLAGS="-isysroot $IPHONEOS_SDK_PATH -arch arm64 -miphoneos-version-min=$IOS_MIN_VERSION"

    go build -v -tags="ios" --buildmode=c-archive -o build/libgoiostest_ios_arm64.a
}

echo "Building ios arm64..."
build_ios_arm64
echo "Done!"

这完美地工作。但是一旦我导入一个本身使用 CGO 的包（例如 github.com/anacrolix/go-libutp），就像这样：

package main

import (
    "fmt"
    _ "github.com/anacrolix/go-libutp"
)

func main() {
    fmt.Println("Hello World")
}

我收到以下错误消息：

Building ios arm64...
github.com/anacrolix/go-libutp
# github.com/anacrolix/go-libutp
In file included from utp_api.cpp:25:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:15: fatal error: 'stdio.h' file not found
Done!

我在这里做错了什么？

更新： 我刚刚在我的 bash 脚本中添加了以下行：

export SDKROOT=$(xcrun --sdk iphoneos --show-sdk-path)

产生不同的错误：

Building ios arm64...
github.com/anacrolix/go-libutp
# github.com/anacrolix/go-libutp
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:68:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/cdefs.h:816:2: error: Unsupported architecture
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:71:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_types.h:27:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/machine/_types.h:34:2: error: architecture not supported
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:71:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_types.h:27:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:55:9: error: unknown type name '__int64_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:56:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:57:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:60:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:61:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:62:9: error: unknown type name '__uint64_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:68:9: error: unknown type name '__darwin_natural_t'
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:70:9: error: unknown type name '__uint16_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:71:9: error: unknown type name '__int64_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:72:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:73:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:74:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:75:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types.h:76:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:71:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_types.h:43:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
note: '__uint128_t' declared here
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:75:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types/_va_list.h:31:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/machine/types.h:37:2: error: architecture not supported
In file included from utp_api.cpp:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/stdio.h:107:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/_stdio.h:75:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk/usr/include/sys/_types/_va_list.h:32:9: error: unknown type name '__darwin_va_list'
fatal error: too many errors emitted,stopping now [-ferror-limit=]
Done!