Can't install on OS X 10.11

[cherring]

Hi, I am unable to get event machine to install on El Capitan, and for the life of me cannot find a solution. It keeps looking for /usr/bin/g++-4.2, and I don't know why it keeps configuring that, as it does

gem install eventmachine -- --with-cppflags=-I/usr/local/opt/openssl/include
Fetching: eventmachine-1.0.9.1.gem (100%)
Building native extensions with: '--with-cppflags=-I/usr/local/opt/openssl/include'
This could take a while...
ERROR: Error installing eventmachine:
ERROR: Failed to build gem native extension.

/Users/chris/.rbenv/versions/2.1.8/bin/ruby extconf.rb --with-cppflags=-I/usr/local/opt/openssl/include

checking for main() in -lcrypto... yes
checking for main() in -lssl... yes
checking for openssl/ssl.h... yes
checking for openssl/err.h... yes
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... yes
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... yes
checking for rb_thread_fd_select()... yes
checking for rb_fdset_t in ruby/intern.h... yes
checking for pipe2() in unistd.h... no
checking for accept4() in sys/socket.h... no
checking for SOCK_CLOEXEC in sys/socket.h... no
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for sys/event.h... yes
checking for sys/queue.h... yes
checking for clock_gettime()... no
checking for gethrtime()... no
CXXFLAGS=$(cxxflags)
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling binder.cpp
make: /usr/bin/g++-4.2: No such file or directory
make: *** [binder.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/chris/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/gems/eventmachine-1.0.9.1 for inspection.
Results logged to /Users/chris/.rbenv/versions/2.1.8/lib/ruby/gems/2.1.0/extensions/x86_64-darwin-15/2.1.0-static/eventmachine-1.0.9.1/gem_make.out

[cherring]

Ok, I had ruby in .rbenv/ that was installed from an older OS X that relied upon g++-4.2, deleting my .rbenv install and then re installing ruby and then my gems solved the problem.