Download the source and unpack…

# wget http://samba.org/samba/ftp/stable/samba-3.4.3.tar.gz
# tar zxvf samba-3.4.3.tar.gz
# cd samba-3.4.3/source3

Some people have tried the latest Samba 3.4.4 and report that it works with the rest of these instructions as well. If you want 3.4.4, do this instead:
# wget http://samba.org/samba/ftp/stable/samba-3.4.4.tar.gz
# tar zxvf samba-3.4.4.tar.gz
# cd samba-3.4.4/source3

I needed some development headers for the compile, so

# apt-get install libldap2-dev libkrb5-dev uuid-dev libpam0g-dev zlib1g-dev

You may need more than these – if so, your configure will fail and it will tell you that something.h wasn’t found. apt-cache search something will usually give you the package you are looking for, or a quick Google will tell you what to get.  For example, I was told uuid.h was missing, so:

# apt-cache search uuid | grep -- -dev
libblkid-dev - block device id library - headers and static libraries
libossp-uuid-dev - OSSP uuid ISO-C and C++ - headers and static libraries
uuid-dev - universally unique id library - headers and static libraries

uuid-dev was pretty obvious, so I installed it and the next time I ran ./configure, it went further before failing on something else.  The apt-get command above includes all of the roadblocks I ran into.

Here is the ./configure command I used, which matches the one from the Ubuntu 3.0.28a source with the exception that I removed –without-smbclient from the list of options.

You may want to use Yogg’s configure command from the comments below instead – I haven’t tried it yet, but he indicates it matches the actual Ubuntu file structure better.

# ./configure --cache-file=./config.cache \
--with-fhs \
--enable-shared \
--enable-static \
--disable-pie \
--prefix=/usr \
--sysconfdir=/etc \
--libdir=/etc/samba \
--with-privatedir=/etc/samba \
--with-piddir=/var/run/samba \
--localstatedir=/var \
--with-rootsbindir=/sbin \
--with-pammodulesdir=/lib/security \
--with-pam \
--with-syslog \
--with-utmp \
--with-readline \
--with-pam_smbpass \
--with-libsmbclient \
--with-winbind \
--with-shared-modules=idmap_rid,idmap_ad \
--with-automount \
--with-ldap \
--with-ads \
--with-dnsupdate \
--with-cifsmount \
--with-acl-support \
--with-quotas

Once the ./configure ran without issues, I ran make:
# make
Using CFLAGS = -O -I. -I/root/samba-3.4.3/source3 -I/root/samba-3.4.3/source3/../lib/popt -I/root/samba-3.4.3/source3/iniparser/src -Iinclude -I./include -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -DHAVE_CONFIG_H -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Iinclude -I./include -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -I./../lib/popt -DLDAP_DEPRECATED -I/root/samba-3.4.3/source3/lib -I.. -I../source4 -D_SAMBA_BUILD_=3 -D_SAMBA_BUILD_=3
PICFLAG = -fPIC
LIBS = -lresolv -lnsl -ldl
LDFLAGS = -Wl,-z,relro -Wl,-Bsymbolic-functions -L./bin
DYNEXP = -Wl,--export-dynamic
LDSHFLAGS = -shared -Wl,-Bsymbolic -Wl,-z,relro -Wl,-Bsymbolic-functions -L./bin
SHLIBEXT = so
SONAMEFLAG = -Wl,-soname=
mkdir bin
Compiling ../lib/talloc/talloc.c
Linking non-shared library bin/libtalloc.a
Compiling ../lib/replace/replace.c
Compiling ../lib/replace/snprintf.c
Compiling ../lib/replace/getpass.c
creating /root/samba-3.4.3/source3/exports/libtalloc.syms
Linking shared library bin/libtalloc.so.1
Compiling ../lib/tdb/common/tdb.c
Compiling ../lib/tdb/common/dump.c
... etc ...
which went fine, then make install:
# make install
Using CFLAGS = -O -I. -I/root/samba-3.4.3/source3 -I/root/samba-3.4.3/source3/../lib/popt -I/root/samba-3.4.3/source3/iniparser/src -Iinclude -I./include -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -DHAVE_CONFIG_H -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Iinclude -I./include -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -I./../lib/popt -DLDAP_DEPRECATED -I/root/samba-3.4.3/source3/lib -I.. -I../source4 -D_SAMBA_BUILD_=3 -D_SAMBA_BUILD_=3
PICFLAG = -fPIC
LIBS = -lresolv -lnsl -ldl
LDFLAGS = -Wl,-z,relro -Wl,-Bsymbolic-functions -L./bin
DYNEXP = -Wl,--export-dynamic
LDSHFLAGS = -shared -Wl,-Bsymbolic -Wl,-z,relro -Wl,-Bsymbolic-functions -L./bin
SHLIBEXT = so
SONAMEFLAG = -Wl,-soname=
Installing bin/smbd as ///usr/sbin/smbd
Installing bin/nmbd as ///usr/sbin/nmbd
Installing bin/swat as ///usr/sbin/swat
Installing bin/winbindd as ///usr/sbin/winbindd
======================================================================
The binaries are installed. You may restore the old binaries (if there
were any) using the command "make revert". You may uninstall the binaries
using the command "make uninstallbin" or "make uninstall" to uninstall
binaries, man pages and shell scripts.
======================================================================
Installing bin/wbinfo as ///usr/bin/wbinfo
Installing bin/smbclient as ///usr/bin/smbclient
Installing bin/net as ///usr/bin/net
... etc ...

which, since I used the configure flags from the original Ubuntu distro, just installs the new version over top of the old.

Next, I tried restarting samba, but I got an error about a missing library:

# /etc/init.d/samba restart
* Stopping Samba daemons [ OK ]
* Starting Samba daemons
/usr/sbin/nmbd: error while loading shared libraries: libtalloc.so.1: cannot open shared object file: No such file or directory
[fail]


You need to tell your system where to find the libraries it’s looking for. Stupid system. We just made them, but it doesn’t know where to find them. Create /etc/ld.so.conf.d/samba.conf as follows:

# echo "/etc/samba" > /etc/ld.so.conf.d/samba.conf
# ldconfig

Then you should be able to start Samba.

# /etc/init.d/samba start
* Starting Samba daemons [ OK ]

Don’t forget to copy the new samba.schema into the LDAP schema directory if you’re using LDAP.
# cp ../../examples/LDAP/samba.schema /etc/ldap/schema/samba.schema