root@ubuntu:/usr/src# ls
linux-headers-2.6.35-22  linux-headers-2.6.35-22-server  php-5.3.8  php5_5.3.8.0-1ubuntu3.diff.gz  php5_5.3.8.0-1ubuntu3.dsc  php5_5.3.8.0.orig.tar.gz
root@ubuntu:/usr/src# cd php-5.3.8/
root@ubuntu:/usr/src/php-5.3.8# dpkg-buildpackage --as-root
dpkg-buildpackage: export CFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export CPPFLAGS from dpkg-buildflags (origin: vendor):
dpkg-buildpackage: export CXXFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export FFLAGS from dpkg-buildflags (origin: vendor): -g -O2
dpkg-buildpackage: export LDFLAGS from dpkg-buildflags (origin: vendor): -Wl,-Bsymbolic-functions
tail: cannot open `debian/changelog' for reading: No such file or directory
dpkg-buildpackage: error: tail of debian/changelog gave error exit status 1
root@ubuntu:/usr/src/php-5.3.8#