From: "mame (Yusuke Endoh)" Date: 2012-05-31T23:32:31+09:00 Subject: [ruby-core:45339] [ruby-trunk - Bug #6508][Feedback] Add an (optional) GNU configure option to demand libyaml before continuing, when compiling ruby from source Issue #6508 has been updated by mame (Yusuke Endoh). Status changed from Open to Feedback I completely agree that the behavior you are proposing is best. But it would be hard to implement exactly because the library (libyaml) is searched by extconf.rb, which requires ruby executable (miniruby). So, it is impossible to make configure fail when there is no libyaml. To be exact, it is possible if not only extconf.rb but also configure checks libyaml. But it would be also hard to accept this method, in terms of maintenance. Please let us know if you have any alternative implementation approach. If there is no proposal, I'm sorry but I'll reject this ticket. -- Yusuke Endoh ---------------------------------------- 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#change-26921 Author: shevegen (markus heiler) Status: Feedback 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. -- http://bugs.ruby-lang.org/