SDK “iphoneos” cannot be located missing required architecture arm64 in file /usr/lib/libSystem.dyli

背景

ios
第一次使用xcode 编译ffmpeg arm64报错，当然,库都不重要。这个第一次,新电脑

报错

xcrun -sdk iphoneos clang is unable to create an executable file.
C compiler test failed.

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
[email protected] mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.

说的我都懵了, 直接去config.log

SDK “iphoneos” cannot be located #这里
missing required architecture arm64 in file /usr/lib/libSystem.dylib (2 slices)

这里只能给你们看看部分log，因为log已经没了。只能浏览器历史记录找了。

解决

第一句 ，提示xcode 找不到
第二句,libSystem.dylib 说缺少arm64，上了11的xcode怎么可能没有

~$ xcodebuild -version
#还真链接不到,报这个错误的原因是xcode-select不在默认的路径
xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer 

~$ xcode-select --print-path
/Library/Developer/CommandLineTools

#这里指定到咱们下的xcode上
~$ sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer/ 

#验证一下
~$ xcode-select --print-path
#没有错
/Applications/Xcode.app/Contents/Developer

~$ xcodebuild -version
Xcode 11.3.1
Build version 11C504

输出了xcode version 就链接成功了，我觉得此刻应该是搞定问题了，再重新编译即可