Comments on Michael Greenly: Multiple Versions of Ruby on Ubuntu #3

On Make Command, I am facing following error math...

2010-05-11T18:06:36.697-07:00

On Make Command, I am facing following error

math.c:37:13: error: missing binary operator before token "("
make: *** [math.o] Error 1

Any Help? I am using Ubuntu 9.10 on X86_64

Thank You
Amit

After Executing make command, I am receiving follo...

2010-04-12T09:35:20.112-07:00

After Executing make command, I am receiving following error

root@ruby-dev:/home/apandya/Downloads/ruby-1.8.6-p111# make
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c array.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c bignum.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c class.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c compar.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c dir.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c dln.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c enum.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c error.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c eval.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c file.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c gc.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c hash.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c inits.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c io.c
io.c: In function ‘appendline’:
io.c:1546: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result
io.c: In function ‘next_argv’:
io.c:4467: warning: ignoring return value of ‘fchown’, declared with attribute warn_unused_result
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c marshal.c
gcc -g -O2 -fPIC -DRUBY_EXPORT -D_GNU_SOURCE=1 -I. -I. -c math.c
math.c:37:13: error: missing binary operator before token "("
make: *** [math.o] Error 1

Excellent Blog

2009-12-14T18:45:57.083-08:00

Excellent Blog

Micheal thanks for your instructions.. a minor enh...

2009-11-14T14:48:55.809-08:00

Micheal thanks for your instructions.. a minor enhancement which i use.. just thought i should share.

Adding ruby -v at the end; ensures that the correct ruby version was selected.

1) sudo rm -rf /opt/ruby; sudo ln -s /opt/ruby-1.8.7-p72 /opt/ruby; ruby -v;;
2) sudo rm -rf /opt/ruby; sudo ln -s /opt/ruby-1.9.1-p243 /opt/ruby; ruby -v;;

Ouput looks like:

Your choice? : 1
ruby 1.8.7 (2008-08-11 patchlevel 72) [i686-linux]

-Ritesh

Michael, thanks so much for these very clear instr...

2009-09-02T01:51:54.282-07:00

Michael, thanks so much for these very clear instructions. With modifications to reflect new versions, I was successful in installing 1.8.7 from source. Will move on to 1.9.1 in a bit. I blew 9 hours yesterday trying to do this with a slightly different approach, and failed. I'm grateful to be successful today. It was your level of detail that made the difference. Much gratitude!

Oren: you don't need to remove the folder, but...

2009-08-17T03:30:50.697-07:00

Oren: you don't need to remove the folder, but you can. You can either simply change all occurrences of ruby-1.9.1-p0 in the existing script with 1.9.1-p243 or as an alternative you could simply add the additional version.

If you're going to add it you'll want to make changes like this....

4. ruby-1.9.1-p0
5. ruby-1.9.1-p243
6. exit

and

4) rm -rf /opt/ruby; ln -s /opt/ruby-1.9.1-p0 /opt/ruby;;
5) rm -rf /opt/ruby; ln -s /opt/ruby-1.9.1-p243 /opt/ruby;;
6) exit;;

thanks, I had this line, but not identical..it wor...

2009-08-16T20:45:42.661-07:00

thanks,
I had this line, but not identical..it works now.

one more question - to get recent ruby (1.9.1-p243),
do I need to remove the folder /opt/ruby-1.9.1-p0
and install the new one instead?

Thanks again

Oren: You're clearly having path issues. The ...

2009-08-16T16:45:43.172-07:00

Oren: You're clearly having path issues. The entire setup I've described depends on having the symbolic link '/opt/ruby' come before any other Ruby executables in your $PATH.

I'd start by inspect $PATH.

If you still have troubles after that let me know.

I have issues with rake and cucumber: when I type...

2009-08-16T12:56:08.330-07:00

I have issues with rake and cucumber:

when I type rake or cucumber I get:

/usr/bin/rake: /usr/bin/ruby1.8: bad interpreter: No such file or directory

thanks for this guide! btw, if i want newer rubyg...

2009-08-16T10:35:39.490-07:00

thanks for this guide!

btw, if i want newer rubygems for each of the versions, i can simply compile it on top of the existing ones?

Thanks Michael. The select_ruby script now works ...

2009-07-06T00:42:02.899-07:00

Thanks Michael. The select_ruby script now works like a charm :)

Thanks for the series of posts. I've no exper...

2009-06-15T02:46:00.193-07:00

Thanks for the series of posts.

I've no experience with update-alternatives, but it seems like it was written specifically to solve this problem. You said you weren't satisfied with it. Could you explain why?

Thanks

Paul

Aaron: Sorry about that. Blogger has a habit of m...

2009-04-28T04:18:00.000-07:00

Aaron: Sorry about that. Blogger has a habit of munging the html of it's posts and stripping out line endings where it shouldn't. I updated the script.

running 'sudo select_ruby' returns: /usr/local/bi...

2009-04-27T20:27:00.000-07:00

running 'sudo select_ruby' returns:

/usr/local/bin/select_ruby: 5: Syntax error: ")" unexpected (expecting "done")

I didn't get this error anymore. I had other termi...

2009-04-13T23:12:00.000-07:00

I didn't get this error anymore. I had other terminal open while I installed new ruby 1.9.

Thanks for your example on how to install both ruby versions. It works fine for me now.

Luan

When I type command: sudo gem install sequel sudo...

2009-04-13T22:04:00.000-07:00

When I type command:

sudo gem install sequel
sudo: unable to execute /usr/bin/gem: No such file or directory

I got the unable to execute /usr/bin/gem. How do I get rid of this error.

Thanks,
Luan