ターミナルを使ったC++のコンパイルができない

前提・実現したいこと

macのターミナルによるC++のコンパイル
久々にプログラミングやろうと思って以前作ったファイルをターミナルでコンパイルしようとしたら, 長文のエラーメッセージが出てきてどうすればいいのかわからなってしまいました.

発生している問題・エラーメッセージ

2019-01-11 06:20:51.183 xcodebuild[21419:4882922] [MT] DVTPlugInLoading: Failed to load code for plug-in com.apple.dt.IDE.DVTKitDFRSupport (/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin), error = Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 265): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit" UserInfo={NSLocalizedFailureReason=The bundle couldn’t be loaded., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSFilePath=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, NSDebugDescription=dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 265): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit, NSBundlePath=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin, NSLocalizedDescription=The bundle “DVTKitDFRSupport” couldn’t be loaded.}, dyldError = dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 0): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
2019-01-11 06:20:51.183 xcodebuild[21419:4882922] [MT] DVTPlugInExtensionFaulting: Failed to fire fault for extension Xcode.DVTKitDFRSupport.Initializer: Error Domain=DVTPlugInErrorDomain Code=2 "Loading a plug-in failed." UserInfo={DVTPlugInIdentifierErrorKey=com.apple.dt.IDE.DVTKitDFRSupport, DVTPlugInExecutablePathErrorKey=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, NSLocalizedRecoverySuggestion=The plug-in or one of its prerequisite plug-ins may be missing or damaged and may need to be reinstalled., DVTPlugInDYLDErrorMessageErrorKey=dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 0): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit, NSLocalizedDescription=Loading a plug-in failed., NSFilePath=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin, NSLocalizedFailureReason=The plug-in “com.apple.dt.IDE.DVTKitDFRSupport” at path “/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin” could not be loaded.  The plug-in or one of its prerequisite plug-ins may be missing or damaged., NSUnderlyingError=0x7fa2ba69d9e0 {Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 265): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit" UserInfo={NSLocalizedFailureReason=The bundle couldn’t be loaded., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSFilePath=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, NSDebugDescription=dlopen(/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin/Contents/MacOS/DVTKitDFRSupport, 265): Symbol not found: _OBJC_IVAR_$_NSTextViewIvars.sharedData
  Referenced from: /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit
  Expected in: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
 in /Applications/Xcode.app/Contents/Developer/usr/bin/../../../SharedFrameworks/DVTKit.framework/Versions/A/DVTKit, NSBundlePath=/Applications/Xcode.app/Contents/PlugIns/DVTKitDFRSupport.ideplugin, NSLocalizedDescription=The bundle “DVTKitDFRSupport” couldn’t be loaded.}}}
** INTERNAL ERROR: Uncaught exception **
Uncaught Exception: Error getting value for key 'initializationClass' of extension 'Xcode.DVTKitDFRSupport.Initializer' in plug-in 'com.apple.dt.IDE.DVTKitDFRSupport'
Stack:
  0   __exceptionPreprocess (in CoreFoundation)
  1   objc_exception_throw (in libobjc.A.dylib)
  2   -[DVTExtension valueForKey:error:] (in DVTFoundation)
  3   _IDEInitializeOnePlugInAndPrerequisites (in IDEFoundation)
  4   _IDEInitializePlugIns (in IDEFoundation)
  5   IDEInitialize (in IDEFoundation)
  6   -[Xcode3CommandLineBuildTool run] (in Xcode3Core)
  7  0x0000000102d7a202 (in xcodebuild)
  8   start (in libdyld.dylib)

sh: line 1: 21423 Abort trap: 6           /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -sdk macosx -find clang++ 2> /dev/null
c++: error: unable to find utility "clang++", not a developer tool or in PATH