Issue #6021 has been updated by Nobuyoshi Nakada. Status changed from Open to Feedback Can't you show mkmf.log file under ext/dbm? And the shared library which that dbm.so is linked against has "dbm_open" or similar symbol? ---------------------------------------- Bug #6021: TestDBM#test_aref test fails https://bugs.ruby-lang.org/issues/6021 Author: Vit Ondruch Status: Feedback Priority: Normal Assignee: Category: Target version: ruby -v: ruby 1.9.3p105 (2012-02-13 revision 34579) [x86_64-linux] Testing with Fedora 17/Rawhide, I get following test error: TestDBM#test_aref = ./ruby: symbol lookup error: /builddir/build/BUILD/ruby-1.9.3-p105/.ext/x86_64-linux/dbm.so: undefined symbol: dbm_open # rpm -q gdbm gdbm-1.10-2.fc17.x86_64 -- http://bugs.ruby-lang.org/