When I build with 'make -j5', samba3 fails to build because:

In file included from lib/talloc/talloc.c:36:
include/includes.h:804:19: error: proto.h: No such file or directory

proto.h isn't yet built when talloc.c is being compiled.  There needs to be a dependency added there.

Compiling with 'make -j1' works.

Full output:
Generating smbd/build_options.c
Using FLAGS      =  -O -D_SAMBA_BUILD_=3 -fno-common  -I/opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/iniparser/src -Iinclude -I./include  -I. -I. -I./lib/replace -I./lib/talloc -I./lib/tdb/include -I./libaddns -I./librpc -DHAVE_CONFIG_H  -I/opt/local/include -DHAVE_STRUCT_TIMESPEC -Iinclude -I./include -I. -I. -I./lib/replace -I./lib/talloc -I./lib/tdb/include -I./libaddns -I./librpc -I./popt -DLDAP_DEPRECATED   -I/include -I/opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/lib -D_SAMBA_BUILD_=3
Building include/build_env.h
      PICFLAG    = -fPIE
      LIBS       = -lresolv -liconv
      LDFLAGS    = -dynamic -Wl,-search_paths_first -L/opt/local/lib -L./bin
      DYNEXP     = 
      LDSHFLAGS  = -dynamiclib -flat_namespace -undefined suppress  -dynamic -Wl,-search_paths_first -L/opt/local/lib -L./bin
      SHLIBEXT   = dylib
      SONAMEFLAG = #
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/web/swat_proto.h
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/winbindd/winbindd_proto.h
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/libnet/libnet_proto.h
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/client/client_proto.h
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/utils/net_proto.h
mkdir bin
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/utils/ntlm_auth_proto.h
Compiling lib/talloc/talloc.c
Compiling lib/replace/replace.c
In file included from lib/talloc/talloc.c:36:
include/includes.h:804:19: error: proto.h: No such file or directory
Compiling lib/replace/snprintf.c
The following command failed:
/usr/bin/gcc-4.0 -I. -I/opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source  -O -D_SAMBA_BUILD_=3 -fno-common  -I/opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/iniparser/src -Iinclude -I./include  -I. -I. -I./lib/replace -I./lib/talloc -I./lib/tdb/include -I./libaddns -I./librpc -DHAVE_CONFIG_H  -I/opt/local/include -DHAVE_STRUCT_TIMESPEC -Iinclude -I./include -I. -I. -I./lib/replace -I./lib/talloc -I./lib/tdb/include -I./libaddns -I./librpc -I./popt -DLDAP_DEPRECATED   -I/include -I/opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/lib -D_SAMBA_BUILD_=3 -fPIE -c lib/talloc/talloc.c -o lib/talloc/talloc.o
Compiling lib/replace/getpass.c
Compiling lib/replace/strptime.c
creating /opt/local/var/macports/build/_Users_jeremy_src_macports-trunk_dports_net_samba3/work/samba-3.2.11/source/exports/libtalloc.syms