Mountain Lion rvm install 1.8.7 x11 error

Try to install X11 via http://xquartz.macosforge.org/landing/ set the correct path to the X11 library for the compiler with:

export CPPFLAGS=-I/opt/X11/include

then try to reinstall ruby, passing to the compiler where gcc-4.2 is:

CC=/usr/local/bin/gcc-4.2 rvm reinstall 1.8.7

Without CC I got a lot of segmentation faults.

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