Lion ate my RVM and now I can't install Ruby

Question

I recently upgraded to Lion and everything was fine. Even rebooted the machine a few time. Then over the weekend, Rails was gone! All of my gemsets were gone. I swear I don't know what happened. It WAS working just fine.

After looking closer, RVM itself was gone.

So, I reinstall RVM and try to install Ruby 1.9.2 and I get this error log:

[2011-08-08 14:30:41]  ./configure --prefix="/Users/cbmeeks/.rvm/usr"  
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... config/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)... no
checking for gcc... /usr/bin/gcc-4.2
checking whether the C compiler works... no
configure: error: in `/Users/cbmeeks/.rvm/src/yaml-0.1.4':
configure: error: C compiler cannot create executables
See `config.log' for more details

It appears that gcc is gone? I'd prefer not to just start randomly reinstalling everything since all was working before.

Any ideas?

Thanks.

Answer 1

After you install Lion, you have to re-install Xcode/Developer tools. It is available from the app store.

http://itunes.apple.com/us/app/id448457090?mt=12

Answer 2

If you don't want to do a full XCode install, you might want to check out this project: https://github.com/kennethreitz/osx-gcc-installer