问题
I just upgraded my MacBook Pro to Mavericks and my local Ruby on Rails development environment isn't running straight off the bat, when I visit localhost I see It works! and remembered I needed to start Phusion Passenger, so when I run passenger start it checks all the prerequisites and fails when it gets to the PCRE Development Headers:
* Checking for PCRE development headers...
Found: no
It tells me to go to http://www.pcre.org/ to download them so I downloaded 8.33 from here which went to my Downloads folder, so I unzipped it, cd'd to the folder and ran:
./configure
make
make install
Then cd'd back to my rails app directory on my Desktop and re-ran passenger start but it's still the same. Tried a new Terminal window but that didn't make any difference.
I must have done this before to get my dev environment working but can't seem to solve it this time.
I also tried brew install pcre but it says Warning: pcre-8.33 already installed.
回答1:
Reinstall the OS X Developer Tools. It was broken by the Mavericks upgrade.
回答2:
Reinstalling OS X Developer Tools did not work for me so I recommend
brew install pcre
Also you can do
brew install passenger
Which will install all needed requirements if additional missing.
来源：https://stackoverflow.com/questions/19541066/how-to-install-pcre-development-headers-on-mac-osx