Can't install kgio 2.8.1 on Ubuntu 14.04 - ruby-on-rails

Question

Note: I'm running Ubuntu, not Windows.
This is what happens when trying to install kgio. Am I missing dependencies, what do I install?
gilani#debris$ gem install kgio -v '2.8.1'
Building native extensions. This could take a while...
ERROR: Error installing kgio:
ERROR: Failed to build gem native extension.
/home/gilani/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20151218-13133-1dvzrlz.rb 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... 24
checking for struct RObject... yes
checking size of struct RObject... 40
checking size of int... 4
checking for rb_io_ascii8bit_binmode()... yes
checking for rb_update_max_fd()... yes
checking for rb_fd_fix_cloexec()... yes
checking for rb_cloexec_open()... yes
checking for rb_thread_blocking_region()... no
checking for rb_thread_io_blocking_region()... yes
checking for rb_str_set_len()... yes
checking for rb_time_interval()... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_str_subseq()... yes
checking for rb_ary_subseq()... yes
creating Makefile
make "DESTDIR=" clean
make "DESTDIR="
compiling wait.c
compiling autopush.c
compiling tryopen.c
tryopen.c:42:0: warning: "RUBY_UBF_IO" redefined [enabled by default]
# define RUBY_UBF_IO ((void *)(-1))
^
In file included from /home/gilani/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/ruby.h:1710:0,
from /home/gilani/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby.h:33,
from tryopen.c:1:
/home/gilani/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/intern.h:902:0: note: this is the location of the previous definition
#define RUBY_UBF_IO ((rb_unblock_function_t *)-1)
^
In file included from tryopen.c:43:0:
/home/gilani/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/backward/rubysig.h:14:2: warning: #warning rubysig.h is obsolete [-Wcpp]
#warning rubysig.h is obsolete
^
tryopen.c: In function ‘my_thread_blocking_region’:
tryopen.c:52:2: error: ‘TRAP_BEG’ undeclared (first use in this function)
TRAP_BEG; /* for FIFO */
^
tryopen.c:52:2: note: each undeclared identifier is reported only once for each function it appears in
tryopen.c:54:2: error: ‘TRAP_END’ undeclared (first use in this function)
TRAP_END;
^
make: *** [tryopen.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/gilani/.rvm/gems/ruby-2.2.1/gems/kgio-2.8.1 for inspection.
Results logged to /home/gilani/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/kgio-2.8.1/gem_make.out

Answer 1

As #bjhaid answered in the comments, and didn't follow up. I'll post it here myself to close the questoin:
you are trying to compile the gem against a version of ruby newer than
what it was written against, kgio 2.8.1 was released in
2013(bogomips.org/kgio.git/tag/?h=v2.8.1), ruby 2.2.1 was released
March 2015 (ruby-lang.org/en/news/2015/03/03/ruby-2-2-1-released)

Answer 2

A combination of these helped me on Ubuntu 16.04:
apt-get install ruby-kgio
bundle update kgio

Answer 3

Found that if you rvm is not loaded, you might receive same error.
to verify if rvm is loaded try:
rvm use 2.x.x
if you receive following warning:
You need to change your terminal emulator preferences to allow login
shell. Sometimes it is required to use /bin/bash --login as the
command. Please visit https://rvm.io/integration/gnome-terminal/ for
an example.
This would probably be also your case :-)
/bin/bash --login
rvm use 2.x.x
Solved for me after banging head for about an hour+ why could this happens