Hello, I hope this is the right place to report bugs in bahamut. We have a package for bahamut in the MacPorts package management system for OS X. We have noticed that bahamut fails to build when the C99 standard is used: Undefined symbols for architecture x86_64: "_first_visible_channel", referenced from: _m_who in m_who.o ld: symbol(s) not found for architecture x86_64 The C99 standard can be used by specifying -std=c99 in CFLAGS, or by compiling with the clang compiler which uses C99 by default. This is the patch we are now using to fix this: https://trac.macports.org/browser/trunk/dports/irc/bahamut/files/patch-src-m... There's some more discussion in our bug report on this: https://trac.macports.org/ticket/37151 If I can do anything else to help get this or another fix for this issue into the official bahamut sources, let me know.