nmatrix gem Fails to Install/Build

[martinvahi]

As the following excerpt shows, iruby installation is successful, id est
generally the system is set up properly.

ts2@linux-0fiz:~/tmp$ gem install iruby
Fetching: data_uri-0.1.0.gem (100%)
Successfully installed data_uri-0.1.0
Fetching: mimemagic-0.3.2.gem (100%)
Successfully installed mimemagic-0.3.2
Fetching: bond-0.5.1.gem (100%)
Building native extensions.  This could take a while...
Successfully installed bond-0.5.1
Fetching: iruby-0.3.gem (100%)
Consider installing the optional dependencies to get additional functionality:
  * pry
  * pry-doc
  * awesome_print
  * gnuplot
  * rubyvis
  * nyaplot

Successfully installed iruby-0.3
Parsing documentation for data_uri-0.1.0
Installing ri documentation for data_uri-0.1.0
Parsing documentation for mimemagic-0.3.2
Installing ri documentation for mimemagic-0.3.2
Parsing documentation for bond-0.5.1
Installing ri documentation for bond-0.5.1
Parsing documentation for iruby-0.3
Installing ri documentation for iruby-0.3
Done installing documentation for data_uri, mimemagic, bond, iruby after 4 seconds
4 gems installed
ts2@linux-0fiz:~/tmp$ gem install nmatrix
Fetching: backports-3.8.0.gem (100%)
Successfully installed backports-3.8.0
Fetching: packable-1.3.8.gem (100%)
Successfully installed packable-1.3.8
Fetching: nmatrix-0.2.3.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing nmatrix:
	ERROR: Failed to build gem native extension.

    /opt/2dot7TiB_k8vaketas/ts2/mittevarundatav/_home/m_local/bin_p/Ruby/paigaldatult/v_2_2_3_clang/bin/ruby -r ./siteconf20170709-27909-1b7o733.rb extconf.rb
checking for rb_array_const_ptr() in ruby.h... no
checking for FIX_CONST_VALUE_PTR in ruby.h... no
checking for RARRAY_CONST_PTR in ruby.h... yes
checking for RARRAY_AREF in ruby.h... yes
creating nmatrix_config.h
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling nmatrix.cpp
In file included from nmatrix.cpp:44:
In file included from ./data/data.h:47:
./data/ruby_object.h:113:10: error: conversion function cannot be redeclared
  inline operator uint64_t() const { RETURN_OBJ2NUM(NUM2ULONG)      }
         ^
./data/ruby_object.h:110:10: note: previous declaration is here
  inline operator VALUE() const { return rval; }
         ^
1 error generated.
Makefile:244: recipe for target 'nmatrix.o' failed
make: *** [nmatrix.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/ts2/m_local/bin_p/Ruby/paigaldatult/v_x_x_x_kasutuses/gem_home/gems/nmatrix-0.2.3 for inspection.
Results logged to /home/ts2/m_local/bin_p/Ruby/paigaldatult/v_x_x_x_kasutuses/gem_home/extensions/x86_64-linux/2.2.0/nmatrix-0.2.3/gem_make.out
ts2@linux-0fiz:~/tmp$ uname -a
Linux linux-0fiz 3.16.7-53-desktop #1 SMP PREEMPT Fri Dec 2 13:19:28 UTC 2016 (7b4a1f9) x86_64 x86_64 x86_64 GNU/Linux
ts2@linux-0fiz:~/tmp$ date
Sun Jul  9 11:06:45 EEST 2017
ts2@linux-0fiz:~/tmp$ ruby -v
ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux]
ts2@linux-0fiz:~/tmp$

[translunar]

What happens if you attempt to install the current version from git?

[translunar]

Closing due to no reply.