Hello,
I recently noticed I was unable to install a ruby module that used mkmf
to generate a Makefile.
Just typing
require ‘mkmf’
from within irb showed me the problem. It died with:
“can’t find header files for ruby”
The problem appears to be that mkmf defines
CONFIG = Config::MAKEFILE_CONFIG
from rbconfig.rb. MAKEFILE_CONFIG, however, does not have its values
replaced with real directories like Config::CONFIG does.
So, when mkmf accesses something like CONFIG[‘archdir’] it ends up with
"$(rubylibdir)/$(sitedir)" rather than a real directory.
Just changing one line in mkmf.rb from
CONFIG = Config::MAKEFILE_CONFIG
to
CONFIG = Config::CONFIG
solves the problem for me.
Thanks,
Brad