brew -v install samba

gistfile1.txt

$ brew -v install samba
Homebrew 0.9.1
==> Downloading http://samba.org/samba/ftp/stable/samba-3.6.5.tar.gz
Already downloaded: /Library/Caches/Homebrew/samba-3.6.5.tar.gz
/usr/bin/tar xf /Library/Caches/Homebrew/samba-3.6.5.tar.gz
==> Patching
/usr/bin/patch -f -p1 -i 000-homebrew.diff
patching file source3/lib/system.c
==> ./autogen.sh
./autogen.sh 
./autogen.sh: need autoconf 2.53 or later to build samba from GIT
==> Exit Status: 1
https://github.com/mxcl/master/blob/master/Library/Formula/samba.rb#L17
==> Build Environment
CPU: quad-core 64-bit sandybridge
OS X: 10.7.4-x86_64
Xcode: 4.3.3
X11:  @ /usr/X11
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7
CPPFLAGS: -isystem /usr/local/include
LDFLAGS: -L/usr/local/lib
MACOSX_DEPLOYMENT_TARGET: 10.7
MAKEFLAGS: -j4
Error: Failed executing: ./autogen.sh (samba.rb:17)
These existing issues may help you:
    https://github.com/mxcl/homebrew/issues/13188
Otherwise, this may help you fix or report the issue:
    https://github.com/mxcl/homebrew/wiki/bug-fixing-checklist