Error compiling on Ruby 1.8.7

[knu]

Error compiling on Ruby 1.8.7

[knu]

Having /usr/include/ruby/encoding.h is unusual and it seems something is seriously broken with your installation.
Ruby's header files should be placed inside each version specific directory and must not be globally exposed.

[knu]

Solution: Just remove /usr/include/ruby/. If it was installed by some package, ask the vendor to fix it.

[knu]

Maybe there are also /usr/include/ruby.h and /usr/lib/libruby*, which may as well be moved away.

[postmodern]

Ah ha! I have ruby 1.8.7 installed into /opt/rubies/ruby-1.8.7-p371. For some reason extconf isn't finding it's headers, but instead using system's ruby headers.

[postmodern]

Ah there is no encoding.h in /opt/rubies/ruby-1.8.7-p371/lib/ruby/1.8/x86_64-linux/.

[knu]

ruby/encoding.h was introduced in ruby 1.9.

And ruby never installs its header files directly under /usr/include unless wrongly configured.

[postmodern]

It appears have_header('ruby/encoding.h') in ext/unf/extconf.rb is causing -DHAVE_RUBY_ENCODING_H to be passed in, and thus ruby/encoding.h get's included in. You should probably also check the version of Ruby, since ruby/encoding.h should never be included for Ruby 1.8.x.

[knu]

This is a bug of the ruby-devel rpm. I'll bug report the issue when I feel like it.
There are many other modules that do have_header("ruby/...") in their extconf.rb, so it doesn't help if I only "fix" my module.

[postmodern]

Confirmed. I renamed /usr/include/ruby to /usr/include/ruby-1.9.1 and the module compiled.

[knu]

Just filed a bug report: https://bugzilla.redhat.com/show_bug.cgi?id=245446

Thanks for the report. I wouldn't notice the issue if it weren't for this.

[knu]

The URL I posted above was a wrong one. Follow this instead: https://bugzilla.redhat.com/show_bug.cgi?id=975660