user@Cardboard-Laptop:~/Downloads/dislocker-0.6.1$ make
[  3%] Building C object src/CMakeFiles/dislocker.dir/dislocker.c.o
In file included from /usr/include/ruby-2.0.0/ruby.h:33:0,
                 from /home/garvin/Downloads/dislocker-0.6.1/include/dislocker/ruby.h:35,
                 from /home/garvin/Downloads/dislocker-0.6.1/include/dislocker/accesses/accesses.h:38,
                 from /home/garvin/Downloads/dislocker-0.6.1/src/dislocker.c:36:
/usr/include/ruby-2.0.0/ruby/ruby.h: In function ‘rb_float_value’:
/usr/include/ruby-2.0.0/ruby/ruby.h:777:6: error: negative integer implicitly converted to unsigned type [-Werror=sign-conversion]
      t.v = RUBY_BIT_ROTR((2 - b63) | (v & ~0x03), 3);
      ^
/usr/include/ruby-2.0.0/ruby/ruby.h:777:6: error: negative integer implicitly converted to unsigned type [-Werror=sign-conversion]
cc1: all warnings being treated as errors
make[2]: *** [src/CMakeFiles/dislocker.dir/dislocker.c.o] Error 1
make[1]: *** [src/CMakeFiles/dislocker.dir/all] Error 2
make: *** [all] Error 2