Problem with python2.7 in Debian (testing): Could not open library 'lib.so': lib.so: cannot open shared object file: No such file or directory

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When using using rubypython-0.5.3 with python2.7 in Debian (testing) observe the following:

/usr/local/rvm/gems/ruby-1.9.3-p392/gems/blankslate-3.1.2/lib/blankslate.rb:51: warning: undefining `object_id' may cause serious problems
rake aborted!
Could not open library 'lib.so': lib.so: cannot open shared object file: No such file or directory
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/ffi-1.0.11/lib/ffi/library.rb:121:in `block in ffi_lib'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/ffi-1.0.11/lib/ffi/library.rb:88:in `map'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/ffi-1.0.11/lib/ffi/library.rb:88:in `ffi_lib'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/rubypython-0.5.3/lib/rubypython/python.rb:29:in `<module:Python>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/rubypython-0.5.3/lib/rubypython/python.rb:21:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `block in load'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/rubypython-0.5.3/lib/rubypython.rb:261:in `reload_library'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/rubypython-0.5.3/lib/rubypython.rb:104:in `start'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/pygments.rb-0.2.13/lib/pygments/ffi.rb:8:in `start'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/pygments.rb-0.2.13/lib/pygments/ffi.rb:42:in `lexers'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/pygments.rb-0.2.13/lib/pygments/lexer.rb:147:in `<module:Pygments>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/pygments.rb-0.2.13/lib/pygments/lexer.rb:1:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:221:in `initialize'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:30:in `new'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:30:in `create'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:458:in `block in <module:Linguist>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:434:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:434:in `<module:Linguist>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/language.rb:8:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist/blob_helper.rb:2:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392/gems/github-linguist-2.3.4/lib/linguist.rb:1:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
/srv/rosa_build/current/config/application.rb:11:in `<top (required)>'
/srv/rosa_build/current/Rakefile:4:in `require'
/srv/rosa_build/current/Rakefile:4:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/rake_module.rb:25:in `load'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:637:in `raw_load_rakefile'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:94:in `block in load_rakefile'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:93:in `load_rakefile'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:77:in `block in run'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/gems/rake-10.1.0/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/bin/rake:19:in `load'
/usr/local/rvm/gems/ruby-1.9.3-p392@global/bin/rake:19:in `<main>'
/usr/local/rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `eval'
/usr/local/rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `<main>'

Excavations have shown that rubypython can not find libpython2.7.so, because the public library located in /usr/lib/x86_64-linux-gnu/:

$ ls -l /usr/lib/x86_64-linux-gnu/libpython*
lrwxrwxrwx 1 root root      51 Jun  2 18:19 /usr/lib/x86_64-linux-gnu/libpython2.7.a -> ../python2.7/config-x86_64-linux-gnu/libpython2.7.a
lrwxrwxrwx 1 root root      17 Jun  2 18:19 /usr/lib/x86_64-linux-gnu/libpython2.7.so -> libpython2.7.so.1
lrwxrwxrwx 1 root root      19 Jun  2 18:19 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1 -> libpython2.7.so.1.0
-rw-r--r-- 1 root root 3262616 Jun  2 18:19 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0

Options to fix: add the path matching condition /usr/lib/*-linux-gnu/ to the search libraries path. See my version of the fixation on GitHub: solooboroten/rubypython@88cf287