Fails to build on OS X 10.9 with Xcode 5

[clintharrison]

According to users on #charybdis, everything is fine with Xcode 4 and OS X 10.8.
Trying to build on 10.9 however fails with the following error:

build ==> modules
gcc -fPIC -DPIC -shared -I../include -I../libratbox/include   -O0 -Wall -std=gnu99 -g -g -O2  -DIRCD_PREFIX=\"/Users/clint/ircd\"  core/m_ban.c -o core/m_ban.so
Undefined symbols for architecture x86_64:
  "_CAP_BAN", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_CAP_TS6", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_ConfigFileEntry", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_add_conf_by_address", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_add_to_resv_hash", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_check_klines", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_check_klines_event", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_check_xlines", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_deactivate_conf", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_find_prop_ban", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_get_oper_name", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_ilog", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_kline_queued", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_m_ignore", referenced from:
      _ban_msgtab in m_ban-zwerhZ.o
  "_m_unregistered", referenced from:
      _ban_msgtab in m_ban-zwerhZ.o
  "_make_conf", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_operhash_add", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_operhash_delete", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_prop_bans", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_rb_current_time", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_rb_event_addonce", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_rb_make_rb_dlink_node", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_rb_outofmemory", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_rb_strlcpy", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_remove_reject_mask", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_resv_chan_forcepart", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_resv_conf_list", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_sendto_one_notice", referenced from:
      _m_ban in m_ban-zwerhZ.o
      _ms_ban in m_ban-zwerhZ.o
  "_sendto_realops_snomask", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_sendto_server", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_valid_wild_card", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_valid_wild_card_simple", referenced from:
      _ms_ban in m_ban-zwerhZ.o
  "_xline_conf_list", referenced from:
      _ms_ban in m_ban-zwerhZ.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [core/m_ban.so] Error 1
make: *** [build] Error 2

[anorthall]

Reproduces on my system, same error, with 10.9 and XCode 5.

[kramerc]

I also had the same issue on OS X 10.9 and with Xcode 5. I had success compiling with GCC 4.2 provided from the apple-gcc42 formula on Homebrew.

brew install apple-gcc42
CC=/usr/local/bin/gcc-4.2 ./configure
make

[zadr]

I'm seeing the same errors on 10.10 with Xcode 6.1. Going to poke around a bit, since I would rather not install a 6-7 year old compiler to build Charybdis.