CentOS - Aug 2019 - gem install reel on Centos 7

Hi - I installed ruby for something...
The instructions said to also do the comand:

gem install reel
ERROR:  Error installing reel:
        timers requires Ruby version >= 2.2.1.
[root at devgeis ~]# ruby --version
ruby 2.0.0p648 (2015-12-16) [x86_64-linux]

Not sure what to do. Wait for Centos 8? Thoughts? Thanks,

Jerry

On Sun, Aug 4, 2019 at 6:21 PM Jerry Geis <jerry.geis at gmail.com> wrote:
> Hi - I installed ruby for something...
> The instructions said to also do the comand:
>
> gem install reel
> ERROR:  Error installing reel:
>         timers requires Ruby version >= 2.2.1.
> [root at devgeis ~]# ruby --version
> ruby 2.0.0p648 (2015-12-16) [x86_64-linux]
>
> Not sure what to do. Wait for Centos 8? Thoughts? Thanks,
>
>
>
Install CentOS SCLo RH repository:
      yum install centos-release-scl-rh

Install rh-ruby22-ruby rpm package:
      yum install rh-ruby22-ruby

currently 2.2.9, I think.


-- 
-john r pierce
  recycling used bits in santa cruz

Thanks John for the info... I did that and now I'm missing a file.
I tried to ask yum what package I need - but It did not know.


Building native extensions.  This could take a while...
ERROR: Failed to build gem native extension.

    /opt/rh/rh-ruby22/root/usr/bin/ruby -r
./siteconf20190805-94063-1gebs0u.rb extconf.rb
mkmf.rb can't find header files for ruby at
/opt/rh/rh-ruby22/root/usr/share/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in
/opt/rh/rh-ruby22/root/usr/local/share/gems/gems/nio4r-1.1.1 for inspection.
Results logged to
/opt/rh/rh-ruby22/root/usr/local/lib64/gems/ruby/nio4r-1.1.1/gem_make.out


yum provides /opt/rh/rh-ruby22/root/usr/share/include/ruby.h
Loaded plugins: fastestmirror, langpacks, nvidia
Loading mirror speeds from cached hostfile
 * base: mirror.tzulo.com
 * centos-sclo-rh: mirror.team-cymru.com
 * centos-sclo-sclo: mirror.fileplanet.com
 * elrepo: ord.mirror.rackspace.com
 * epel: ord.mirror.rackspace.com
 * extras: mirror.nodesdirect.com
 * updates: mirrors.liquidweb.com
centos-sclo-rh/x86_64/filelists_db


                                |  12 MB  00:00:01
elrepo/filelists_db


                               |  34 kB  00:00:00
epel/x86_64/filelists_db


                                |  12 MB  00:00:00
google-chrome/filelists


                               | 1.7 kB  00:00:00
updates/7/x86_64/filelists_db


                               | 5.2 MB  00:00:00
No matches found

Thanks, What is next ?

Jerry
>

On Mon, Aug 5, 2019 at 5:01 AM Jerry Geis <jerry.geis at gmail.com> wrote:
> Thanks John for the info... I did that and now I'm missing a file.
> I tried to ask yum what package I need - but It did not know.
>
>
> Building native extensions.  This could take a while...
> ERROR: Failed to build gem native extension.
>
>     /opt/rh/rh-ruby22/root/usr/bin/ruby -r
> ./siteconf20190805-94063-1gebs0u.rb extconf.rb
> mkmf.rb can't find header files for ruby at
> /opt/rh/rh-ruby22/root/usr/share/include/ruby.h

most typically .h files are included in a -dev package, but I dunno about
this one.   googling rh-ruby22, I find, oops, its EOL, and replaced with
rh-ruby23

https://www.softwarecollections.org/en/scls/rhscl/rh-ruby23/

btw, with the SCL stuff, note the "scl enable rh-ruby23 bash" command,
that
spawns you a shell with that packages directories in the path... that might
make this work. see that page for more details, including a gem run.


-- 
-john r pierce
  recycling used bits in santa cruz

Thanks John,

I did the yum remove on rh-ruby22*
did a yum install rh-ruby23-ruby
then I found the rh-ruby23-ruby-devel  and now it works.

Jerry
>