flutter doctor를 했더니

[!] Xcode - develop for iOS and macOS (Xcode 14.2)

    ✗ CocoaPods not installed.

        CocoaPods is used to retrieve the iOS and macOS platform side's plugin

        code that responds to your plugin usage on the Dart side.

        Without CocoaPods, plugins will not work on iOS or macOS.

        For more info, see https://flutter.dev/platform-plugins

      To install see

      https://guides.cocoapods.org/using/getting-started.html#installation for

      instructions.

이렇게 느낌표가 있는것이 있어서

sudo gem install cocoapods

이렇게 cocoapads를 설치를 했는데 설치가 실패해서 로그를 봤더니

package configuration for libffi is not found

"xcrun clang -o conftest -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/universal-darwin21 -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/backward -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT    -g -Os -pipe -DHAVE_GCC_ATOMIC_BUILTINS -DUSE_FFI_CLOSURE_ALLOC conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib -L. -L/AppleInternal/Library/BuildRoots/a0876c02-1788-11ed-b9c4-96898e02b808/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.6.Internal.sdk/usr/local/lib     -lruby.2.6   "

In file included from conftest.c:1:

In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby.h:33:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10: fatal error: 'ruby/config.h' file not found

#include "ruby/config.h"

         ^~~~~~~~~~~~~~~

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10: note: did not find header 'config.h' in framework 'ruby' (loaded from '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks')

1 error generated.

checked program was:

/* begin */

1: #include "ruby.h"

2:

3: int main(int argc, char **argv)

4: {

5:   return 0;

6: }

/* end */

이렇게 되어 있어요. 어떻게 해야 하나요?