= Rebuild Rmpi package for MPICH2 =

 * Default debian package ''r-cran-rmpi'' is depended on lam4 not mpich/mpich2
{{{
Source: rmpi
Section: math
Priority: optional
Maintainer: Dirk Eddelbuettel <edd@debian.org>
Build-Depends: debhelper (>> 4.1.0), cdbs, r-base-dev (>= 2.4.0), lam-runtime, lam4-dev (>= 7.1.1-3.2)
Standards-Version: 3.7.2
}}}
 * First, download source of rmpi package. Use '''apt-get build-dep''' to check the build dependence. Since LAN/MPI will confuse the configure of rmpi package, here we remove the related package which is installed by '''apt-get build-dep''' command.
{{{
#!sh
# apt-get source rpmi
# apt-get build-dep rmpi
# apt-get remove --purge lam-runtime lam4-dev
# apt-get install autoconf automake
# cd rmpi-0.5-3/
~rmpi-0.5-3# 
}}}
 * modified configure.in
{{{
#!diff
--- rmpi-0.5-3/configure.in.bak    2008-07-10 11:46:32.000000000 -0700
+++ rmpi-0.5-3/configure.in     2008-07-10 11:48:50.000000000 -0700
@@ -10,7 +10,7 @@
 )

 if test -z "$MPI_ROOT"; then
-  for d in /opt/lib /usr/local/lib /usr/lib; do
+  for d in /opt/lib /usr/local/lib /usr/lib /usr; do
     if test -f $d/lam/include/mpi.h && test -f $d/lam/lib/libmpi.a; then
       echo "I am here $d/lam"
       MPI_ROOT=$d/lam
@@ -23,6 +23,10 @@
       echo "I am here $d/mpich"
       MPI_ROOT=$d/mpich
       break
+    elif test -f $d/include/mpich2/mpi.h; then
+      echo "I am here $d/include/mpich2"
+      MPI_ROOT=$d
+      break
     fi
   done
 fi
@@ -38,6 +42,9 @@
     elif test -f /usr/local/include/mpi.h; then
          echo "Found in /usr/local/include"
          MPI_INCLUDE="-I/usr/local/include"
+    elif test -f /usr/include/mpich2/mpi.h; then
+         echo "Found in /usr/include/mpich2"
+         MPI_INCLUDE="-I/usr/include/mpich2"
     else
          echo "Cannot find mpi head file"
          echo "Please use --with-mpi=/path/to/mpi or specify the environment variable MPI_ROOT"
}}}
 * run '''autoreconf''' to regenerate the configure file
{{{
#!sh
~/rmpi-0.5-3# autoreconf
}}}
 * modified debian/control
{{{
#!diff
--- rmpi-0.5-3/debian/control.bak 2008-07-10 11:46:40.000000000 -0700
+++ rmpi-0.5-3/debian/control   2008-07-10 12:00:02.000000000 -0700
@@ -2,7 +2,7 @@
 Section: math
 Priority: optional
 Maintainer: Dirk Eddelbuettel <edd@debian.org>
-Build-Depends: debhelper (>> 4.1.0), cdbs, r-base-dev (>= 2.4.0), lam-runtime, lam4-dev (>= 7.1.1-3.2)
+Build-Depends: debhelper (>> 4.1.0), cdbs, r-base-dev (>= 2.4.0), libmpich2-1.0-dev
 Standards-Version: 3.7.2

 Package: r-cran-rmpi
}}}
 * run '''dch -i''' for editing changlog
{{{
#!sh
~/rmpi-0.5-3# dch -i
}}}
{{{
#!diff
--- debian/changelog.bak        2008-07-10 12:16:08.000000000 -0700
+++ debian/changelog    2008-07-10 11:55:00.000000000 -0700
@@ -1,3 +1,9 @@
+rmpi (0.5-3-2mpich2) unstable; urgency=low
+
+  * modified configure.in and debian/control for mpich2
+
+ -- Jazz Yao-Tsung Wang <jazz@nchc.org.tw>  Thu, 10 Jul 2008 11:54:53 -0700
+
}}}
 * run '''dpkg-buildpackage''' to build the new package
{{{
#!sh
~/rmpi-0.5-3# dpkg-buildpackage
}}}