pwCompileFortranIntegrators

 This description assumes installation of Ubuntu Linux.
 Please let us know the corresponding commands on other Linux distributions.

 Please check whether gcc-4.3 is already installed by typing
 "gcc" in a Linux terminal and pressing the tabulator key twice to
 see a list of matched commands, e.g.

 maiwald@ubuntu-11.04:~$ gcc
 gcc gcc-4.5

 To find out the version of a compiler type e.g. "gcc -v".

 Continue with step 2 if gcc-4.3 is already installed.

 a) On Ubuntu 10.10 and below, the following bash commands should install
 the GNU Compiler Collection 4.3 and the GNU Standard C++ Library
 (compare https://help.ubuntu.com/community/MATLAB and
 http://joysofprogramming.com/install-gfortran-4-3-ubuntu):

 $ sudo apt-get install gcc-4.3-multilib libstdc++6-4.3-dev
 $ sudo apt-get install gfortran-4.3

 Finished.

 b) On Ubuntu 11.04 download the corresponding *.deb files of Ubuntu Maverick
 from (compare http://ubuntuforums.org/showthread.php?t=1748408):

 http://packages.ubuntu.com/maverick/gcc-4.3-multilib
 http://packages.ubuntu.com/maverick/g++-4.3-multilib
 http://packages.ubuntu.com/maverick/gfortran-4.3

 Recursively follow all "=" dependent packages resulting in 8 deb files:

 i386:
 gcc-4.3-multilib_4.3.5-3ubuntu1_i386.deb
 gcc-4.3_4.3.5-3ubuntu1_i386.deb
 gcc-4.3-base_4.3.5-3ubuntu1_i386.deb
 g++-4.3_4.3.5-3ubuntu1_i386.deb
 g++-4.3-multilib_4.3.5-3ubuntu1_i386.deb
 cpp-4.3_4.3.5-3ubuntu1_i386.deb
 gfortran-4.3_4.3.5-3ubuntu1_i386
 libstdc++6-4.3-dev_4.3.5-3ubuntu1_i386.deb

 amd64:

 cpp-4.3_4.3.5-3ubuntu1_amd64.deb
 g++-4.3_4.3.5-3ubuntu1_amd64.deb
 g++-4.3-multilib_4.3.5-3ubuntu1_amd64.deb
 gcc-4.3_4.3.5-3ubuntu1_amd64.deb
 gcc-4.3-base_4.3.5-3ubuntu1_amd64.deb
 gcc-4.3-multilib_4.3.5-3ubuntu1_amd64.deb
 gfortran-4.3_4.3.5-3ubuntu1_amd64.deb
 libstdc++6-4.3-dev_4.3.5-3ubuntu1_amd64.deb

 Change the current bash working directory to the folder with the
 downloaded *.deb file and execute

 $ sudo dpkg -i *.deb

 Then a few broken links have to be corrected (shown only for amd64):

 Broken links:
 /usr/lib/gcc/x86_64-linux-gnu/4.3/libgcc_s.so    -> /lib/libgcc_s.so.1
 /usr/lib/gcc/x86_64-linux-gnu/4.3/libgomp.so     -> ../../../libgomp.so.1
 /usr/lib/gcc/x86_64-linux-gnu/4.3/libstdc++.so   -> ../../../libstdc++.so.6
 /usr/lib/gcc/x86_64-linux-gnu/4.3/libgfortran.so -> ../../../libgfortran.so.3

 Correction (each command is one line, the 'f' option is to force
 overwritting the existing links):
 sudo ln -sf /lib/x86_64-linux-gnu/libgcc_s.so.1 \
             /usr/lib/gcc/x86_64-linux-gnu/4.3/libgcc_s.so
 sudo ln -sf /usr/lib/x86_64-linux-gnu/libgomp.so.1 \
             /usr/lib/gcc/x86_64-linux-gnu/4.3/libgomp.so
 sudo ln -sf /usr/lib/x86_64-linux-gnu/libstdc++.so.6 \
             /usr/lib/gcc/x86_64-linux-gnu/4.3/libstdc++.so
 sudo ln -sf /usr/lib/x86_64-linux-gnu/libgfortran.so.3 \
             /usr/lib/gcc/x86_64-linux-gnu/4.3/libgfortran.so

 Finished.


 c) On Ubuntu 11.10 both approaches will not work but lead to the following
 error message (compare http://ubuntuforums.org/showthread.php?p=11378416):

 dpkg: dependency problems prevent configuration of gcc-4.3:
   libgcc1:i386 (1:4.6.1-9ubuntu3) breaks gcc-4.3 and is installed.
   libgcc1 (1:4.6.1-9ubuntu3) breaks gcc-4.3 and is installed.

 Please let us know if you have a working solution for this case.

 d) Other Linux systems will be desrcribed in the future.
    Please let use know how you got your system working.