ruby build isn't completely VPATH friendly
While a VPATH build of ruby 1.9.2-p290 on Solaris 10 basically worked fine, I got
a couple of warnings that could (and should) be avoided:
During the doxygen step, I get
/vol/src/ruby/ruby-1.9.2-p290/ext/ripper/ripper.y:18: Warning: include file ruby/ruby.h not found, perhaps you forgot to add its directory to INCLUDE_PATH?
and several more similar warnings. They can be avoided by pointing doxygen at the
source directory like this:
INCLUDE_PATH = /vol/src/ruby/ruby-1.9.2-p290 /vol/src/ruby/ruby-1.9.2-p290/include