FindRuby.cmake

[Michael Jansen]

On Wednesday 09 March 2011 21:40:00 Alexander Neundorf wrote:
> Hi Michael,
> 
> On Monday 07 March 2011, Michael Jansen wrote:
> > Ruby has three different installation areas for libraries. Each
> > installation area has two different subdirectories (sort of). One is for
> > architecure independent files. One is for architecture dependent files.
> > 
> > 1. Installation Area: Ruby Library Directory
> > 
> >         rubylibdir  /usr/lib64/ruby/1.8
> >         
> >            archdir  /usr/lib64/ruby/1.8/x86_64-linux
> > 
> > This area is reserved for the ruby standard library (http://www.ruby-
> > doc.org/stdlib/). No other software is supposed to be installed into
> > this
> > directory. It makes no sense for the cmake file to determine and provide
> > the path and location of this area. You don't want to install stuff
> > there
> > and you don't need to get stuff from there. (The libruby.so is somewhere
> > else)
> > 
> > 2. Installation Area: Vendor
> > 
> >            vendordir  /usr/lib64/ruby/vendor_ruby
> >         
> >         vendorlibdir  /usr/lib64/ruby/vendor_ruby/1.8
> >        
> >        vendorarchdir 
> >        /usr/lib64/ruby/vendor_ruby/1.8/x86_64-linux
> > 
> > This area is intended to be used by distributions. They install the
> > libraries provided by distribution packages into that area. You are
> > supposed to install into that area if you build distro packages. It
> > therefore makes sense to determine and provide this area from
> > FindRuby.cmake
> > 
> > 3. Installation Area: Site
> > 
> > This area is intended to be used for self compiled and installed ruby
> > packages. This is the most likely installation area for a ruby
> > extension.
> > 
> > 4. Installation Area: Custom
> > 
> > In Addition to those 3 areas it is possible to install ruby extensions
> > into custom directories and add their path to ruby $LOAD_PATH global
> > array. Each directory has to be added explicitly. There is no automatic
> > archdir handling.
> > 
> >     a) $LOAD_PATH << "<custom_ruby_libdir>" <<
> >     "<custom_ruby_archdir>"
> >     b) ruby -I<path1> -I<path2>
> >     c) Environment Variable RUBY_LIB and/or DLN_LIBRARY_PATH
> > 
> > The current FindRuby.cmake determines the location of the areas 1, 2 (
> > if
> > it exists) and 3. It does not advise or support chosing any installation
> 
> Do you mean the FindRuby.cmake shipped with cmake, the FindRUBY.cmake in
> kdelibs, or another one ?

Did not know about FindRUBY in kdelibs. That is annoying at hell. How about 
introducing FindRuBY.cmake with the new functionality. <-- Sarcasm

I would prefer to patch the cmake one and get rid of the kdelibs one.

Mike