CFLAGS is valid... no

gistfile1.txt

$rvm install ruby-2.2.2
ruby-2.2.2 - #removing src/ruby-2.2.2..
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.10/x86_64/ruby-2.2.2.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx_brew.
Certificates in '/usr/local/etc/openssl/cert.pem' are already up to date.
Requirements installation successful.
Warning: found user selected compiler '/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2', this will suppress RVM auto detection mechanisms.
Installing Ruby from source to: /Users/tyager/.rvm/rubies/ruby-2.2.2, this may take a while depending on your cpu(s)...
ruby-2.2.2 - #downloading ruby-2.2.2, this may take a while depending on your connection...
ruby-2.2.2 - #extracting ruby-2.2.2 to /Users/tyager/.rvm/src/ruby-2.2.2....
ruby-2.2.2 - #configuring.......
Error running './configure --prefix=/Users/tyager/.rvm/rubies/ruby-2.2.2 --with-opt-dir=/usr/local/opt/libyaml:/usr/local/opt/readline:/usr/local/opt/libksba:/usr/local/opt/openssl --disable-install-doc --enable-shared',
showing last 15 lines of /Users/tyager/.rvm/log/1435621076_ruby-2.2.2/configure.log
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking for cd using physical directory... cd -P
checking whether CFLAGS is valid... no
configure: error: something wrong with CFLAGS="-g -O2 "
There has been an error while running configure. Halting the installation.

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CC=/usr/bin/gcc rvm install ruby-2.2.2