bundle-error

/home/deployer/.rbenv/versions/1.9.3-p392/bin/ruby extconf.rb
checking for CLOCK_MONOTONIC in time.h... yes
checking for clockid_t in time.h... yes
checking for clock_gettime() in -lrt... yes
checking for t_open() in -lnsl... no
checking for socket() in -lsocket... no
checking for poll() in poll.h... yes
checking for getaddrinfo() in sys/types.h,sys/socket.h,netdb.h... yes
checking for getnameinfo() in sys/types.h,sys/socket.h,netdb.h... yes
checking for struct sockaddr_storage in sys/types.h,sys/socket.h... yes
checking for accept4() in sys/socket.h... yes
checking for sys/select.h... yes
checking for writev() in sys/uio.h... yes
checking for ruby/io.h... yes
checking for rb_io_t.fd in ruby.h,ruby/io.h... yes
checking for rb_io_t.mode in ruby.h,ruby/io.h... yes
checking for rb_io_t.pathv in ruby.h,ruby/io.h... yes
checking for struct RFile in ruby.h,ruby/io.h... yes
checking size of struct RFile in ruby.h,ruby/io.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/home/deployer/.rbenv/versions/1.9.3-p392/bin/ruby
        --with-rtlib
        --without-rtlib
        --with-nsllib
        --without-nsllib
        --with-socketlib
        --without-socketlib
/home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:330:in `popen': Permission denied - ./conftest (Errno::EACCES)
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:330:in `block in xpopen'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:323:in `xpopen'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:596:in `try_constant'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:1156:in `block in check_sizeof'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
        from /home/deployer/.rbenv/versions/1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:1155:in `check_sizeof'
        from extconf.rb:42:in `<main>'