Issue #6508 has been reported by shevegen (markus heiler).

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Bug #6508: Add an (optional) GNU configure option to demand libyaml before continuing, when compiling ruby from source
https://bugs.ruby-lang.org/issues/6508

Author: shevegen (markus heiler)
Status: Open
Priority: Low
Assignee: 
Category: 
Target version: 1.9.3
ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]


Hi. When I compile ruby 1.9.3 I get this sometimes:

It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.

This is a bit annoying because I need yaml support, so I have to
recompile anyway. So I first compile libyaml, then I recompile ruby.

I had a look at ./configure --help but there was no option provided
to require libyaml before continuing.

My suggestion is to add this to the configure script, so that users 
like me can know that the ruby that was compiled 100% has libyaml
support or 100% does not have libyaml support.

Option for configure:

  --with-libyaml Require a working libyaml installation before continuing.

If libyaml is not installed at configure-time, the configure script
stops with this message (suggestion):

"We were unable to find a working libyaml installation. As --with-libyaml
was passed, we can not continue before you have installed libyaml. Please
install libyaml, either from source such as from http://pyyaml.org/download/libyaml/
or from your distribution's package manager."

Thanks for reading and considering! I like ruby but the change to 
yaml is a bit annoying when compiling ruby, for me it is much easier
if the configure script does not continue, if it has such an option.


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