title: Glog : configure: WARNING: 'missing' script is too old or missing
body: <p>My question is about how to solve the missing script is too old or missing!!</p>
  
  <pre><code>checking for a BSD-compatible install... /usr/bin/install -c
  
  checking whether build environment is sane... yes
  
  checking for arm-apple-darwin-strip... no
  
  checking for strip... strip
  
  checking for a thread-safe mkdir -p... ./install-sh -c -d
  
  checking for gawk... no
  
  checking for mawk... no
  
  checking for nawk... no
  
  checking for awk... awk
  
  checking whether make sets $(MAKE)... yes
  
  checking whether make supports nested variables... yes
  
  checking for arm-apple-darwin-gcc...  /Library/Developer/CommandLineTools/usr/bin/cc -arch armv7 -isysroot 
  
  checking whether the C compiler works... no
  
  xcrun: error: SDK "iphoneos" cannot be located
  
  xcrun: error: SDK "iphoneos" cannot be located
  
  xcrun: error: SDK "iphoneos" cannot be located
  
  xcrun: error: unable to lookup item 'Path' in SDK 'iphoneos'
  
  /Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70/missing: Unknown `--is-lightweight' option Try `/Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70/missing
  --help' for more information
  
  configure: WARNING: 'missing' script is too old or missing
  
  configure: error: in `/Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70': configure: error: C compiler cannot create executables See `config.log' for more details
  </code></pre>