Error Messages
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/include/ruby.h
I mainly bought a new macbook pro, XCode 11 installed, and then ran into this error installed Cocoapods, and never before encountered
Later, after a variety of search, solution ideas and methods are as follows:
Emphasis
In macOS 10.14the installation Xcode 11, also need to install theXcode command line tools
$ sudo xcode-select --install
Added a link to accept the certificate
$ sudo xcodebuild -license accept
This problem is mainly because Xcode 11 carries macOS 10.15 SDK, the SDK contains ruby 2.6 header files, but ruby 2.3 macOS 10.14 but not the file system, so you can verify the problem by following command
$ ruby -rrbconfig -e 'puts RbConfig::CONFIG["rubyhdrdir"]'
This command macOS 10.14 on the system case to install Xcode 11 version will print out this path does not exist
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0
Then, Xcode 11 is mounted on macOS 10.14 SDK, in this path /Library/Developer/CommandLineTools/SDKs/MacOS10.14.sdk. But it's not necessary because the old header files installed contaminate the system directory. So we have to change, specify the appropriate SDK header files and ruby 2.3
$ sudo xcode-select --switch /Library/Developer/CommandLineTools
Then, we'll look at the ruby correct path 2.3
$ ruby -rrbconfig -e 'puts RbConfig::CONFIG["rubyhdrdir"]'
The output will be a normal path exists
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0
So, now, gem installyou can normally use
Now it can be pleasant to install cocoapods
$ gem install cocoapods
After installation, check the next version
$ pod --version
Export
1.9.0
Ultimately successful installation of the various libraries ~~
Note:
XCode SDK 11 used before if you want to change it back, use the command
$ sudo xcode-select --switch /Applications/Xcode.app
Where necessary, the following two environment variables introduced, to write ~ / .zshrc file in
export GEM_HOME=$HOME/.gem
export PATH=$GEM_HOME/bin:$PATH
