= Rebuild mpich2 Debain package =

There are [http://torvalds.cs.mtsu.edu/~zach/debian/current Debian package] provided by Zach Lowry for MPICH2 version 1.0.3. We want to build 1.0.7 package with 1.0.3 package rules. Here is the procedures:

== Extract 1.0.3 debian package rules ==

 * Donwload 1.0.3 debian package source files
{{{
root@r-mpi:~# wget http://www.cs.mtsu.edu/~zach/debian/current/mpich2_1.0.3-2.dsc
root@r-mpi:~# wget http://www.cs.mtsu.edu/~zach/debian/current/mpich2_1.0.3-2.diff.gz
root@r-mpi:~# wget http://www.cs.mtsu.edu/~zach/debian/current/mpich2_1.0.3.orig.tar.gz
}}}
 * We will need '''dpkg-source''' command, so first check if you had installed dpkg-dev
{{{
root@r-mpi:~# apt-get install dpkg-dev
}}}
 * Extract 1.0.3 debian package source
{{{
root@r-mpi:~# dpkg-source -x mpich2_1.0.3-2.dsc
gpg: Signature made Mon 28 Nov 2005 07:49:49 PM PST using DSA key ID 1CE6894E
gpg: Can't check signature: public key not found
dpkg-source: extracting mpich2 in mpich2-1.0.3
dpkg-source: unpacking mpich2_1.0.3.orig.tar.gz
dpkg-source: applying ./mpich2_1.0.3-2.diff.gz
}}}

== Configure 1.0.7 source tar ball ==

 * Download 1.0.7 source tar ball from office website
{{{
root@r-mpi:~# wget http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/mpich2-1.0.7.tar.gz
root@r-mpi:~# tar zxvf mpich2-1.0.7.tar.gz
}}}
 * Copy debian folder from 1.0.3
{{{
root@r-mpi:~# cd mpich2-1.0.7
root@r-mpi:~/mpich2-1.0.7# cp -aRp ../mpich2-1.0.3/debian/ .
}}}
 * We will need '''dch''' command, so first check if you had installed devscripts
{{{
root@r-mpi:~/mpich2-1.0.7# apt-get install devscripts
}}}
 * modified debian/control
{{{
root@r-mpi:~/mpich2-1.0.7# vi debian/control
}}}
{{{
#!diff
--- debian/control.bak 2008-06-12 13:09:27.000000000 -0700
+++ debian/control     2008-06-12 12:57:37.000000000 -0700
@@ -24,7 +24,7 @@
 Architecture: any
 Section: devel
 Priority: extra
-Depends: ${shlibs:Depends}, python2.3, python2.3-xml
+Depends: ${shlibs:Depends}, python, python-xml
 Conflicts: mpd
 Recommends: mpich2-doc (= ${Source-Version}), ssh
 Description: Process control for MPICH2
}}}
 * update debian/changelog
{{{
root@r-mpi:~/mpich2-1.0.7# export DEBFULLNAME="Jazz Yao-Tsung Wang"
root@r-mpi:~/mpich2-1.0.7# export DEBEMAIL="XXX@NCHC.ORG.TW"
root@r-mpi:~/mpich2-1.0.7# dch -i
}}}
{{{
#!diff
--- debian/changelog.bak       2008-06-12 13:13:57.000000000 -0700
+++ debian/changelog   2008-06-12 13:12:03.000000000 -0700
@@ -1,3 +1,8 @@
-mpich2 (1.0.3-3) unstable; urgency=low
+mpich2 (1.0.7-1) unstable; urgency=low
+
+  * New upstream release
+
+ -- Jazz Yao-Tsung Wang <XXX@NCHC.ORG.TW>  Thu, 12 Jun 2008 13:11:50 -0700
}}}
 * remove old patches
{{{
root@r-mpi:~/mpich2-1.0.7# rm -rf debian/patches/
}}}
 * use '''dpkg-checkbuilddeps''' to know which packages is not yet installed for building new packages.
{{{
root@r-mpi:~/mpich2-1.0.7# dpkg-checkbuilddeps
}}}
 * use '''cdbs-edit-patches''' to create new patches