Re-installing ruby after upgrading to OS X Yosemite

I recently upgraded to OS X Yosemite and ran brew install. As a result, my rails setup failed. In the past, re-install ruby worked. However, in this case, when I re-installed it I ran into this issue

BUILD FAILED (OS X 10.10 using ruby-build 20141016)

Inspect or clean up the working tree at /var/folders/93/p8zdbgn14j99_l5x7js97zkm0000gn/T/ruby-build.20141020234934.40511
Results logged to /var/folders/93/p8zdbgn14j99_l5x7js97zkm0000gn/T/ruby-build.20141020234934.40511.log

Last 10 log lines:
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=" -O3 -Wno-error=shorten-64-to-32 "
make: *** No targets specified and no makefile found. Stop.

To fix the issue, I had to reinstall ruby with the following flags:

RUBY_CONFIGURE_OPTS="--without-gcc --disable-install-rdoc" rbenv install 2.1.3