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MPICH From Github

To checkout a new copy of the MPICH source, use

git clone https://github.com/pmodels/mpich.git (for non-core developers without commit rights)
git clone git@github.com:pmodels/mpich.git (for core developers with commit rights)

See the Version Control System page for more information about using our current version control system.

Setting Up The Build Environment

Doing a git clone may not be sufficient to initialize necessary git submodules. To retrieve submodules, run

 git submodule update --init

The git repository does not contain any of the "derived" files, including the configure scripts and the C++ and Fortran 77 language bindings.

To build these, run

./autogen.sh

Occasionally changes are made to the autoconf macros that are not detected by the dependency tests for the configure scripts. It is always correct to delete all of the configure scripts before running autogen.sh:

find . -name configure -print | xargs rm
./autogen.sh

The autoconf macros and the configure.in scripts now require the following:

  • autoconf version 2.67 (or higher)
  • automake version 1.12.3 (or higher)
  • GNU libtool version 2.4 (or higher)

This was done because there are incompatible differences between each minor release of autoconf (e.g. the allowed command line arguments has changed between 2.50 and 2.58).

You can select a particular version of autoconf and autoheader by using the environment variables AUTOCONF and AUTOHEADER respectively. autogen.sh will use these if they are set. However, note that for these tools to work properly, both they and all of their data files must be installed in the same set of directories. The easiest way to ensure this is to use exactly the same configure arguments when you configure and install these tools. For example, if you set the prefix, set the prefix to exactly the same path for all three tools.

Building The Software

Once MPICH has been bootstrapped with autogen.sh, you can perform the usual three step process to build it like any other unix package:

./configure --prefix=INSTALLATION_PREFIX
make -j8
make -j8 install

Substitute INSTALLATION_PREFIX above with a proper directory. Otherwise /usr will be assumed as a default.

Updating Derived Files

Note: most of the time the automake rebuild rules will handle this correctly for you, but not always.

If you change one of the files that is the source for a derived file, such as a configure.in file, you will need to rebuild the derived file (e.g., the corresponding configure file). The safest way to do this is to rerun autogen.sh:

./autogen.sh

(from the top-level MPICH directory). However, this can take a fair amount of time. You can direct autogen.sh to only update certain classes of files. For example, to update all configure files, use

./autogen.sh -do=build_configure

You can use multiple -do arguments. For example, to rebuild the Makefile.in files and the configure files, use

./autogen.sh -do=build_configure -do=makefiles

Check the source of autogen.sh to see what other options are available for -do.