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INSTALL
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Developer/quickstart installation guide
=======================================
This guide assumes that the reader is on a *nix operating system.
Please report any issues encountered or bugs to:
<https://github.com/sourceryinstitute/OpenCoarrays/issues>
How to build OpenCoarrays for the very impatient
------------------------------------------------
git clone https://github.com/sourceryinstitute/OpenCoarrays
cd OpenCoarrays
mkdir build
cd build
cmake ..
make
make test # optional; verify build works
sudo make install
Intended audience
-----------------
* GCC developers
* Package maintainers
* Experienced users who are comfortable installing software from source (with
CMake)
A markdown document (best viewed online) with more detailed instructions is
available. It is locally available at ./INSTALL.md and viewable online at:
<https://github.com/sourceryinstitute/OpenCoarrays/blob/master/INSTALL.md>
Prerequisite software
---------------------
Before installing OpenCoarrays you will need:
* CMake 3.4 or newer
* GFortran 6.1 or newer
* A standard conforming C compiler, GCC 6.1 or newer is preferred, but clang
and other alternatives should be fine too
* An MPI 3 implementation. MPICH 3.2 or newer is recommended, but others,
such as OpenMPI, should work as well.
CMake binary and source distributions can be obtained from:
<https://cmake.org/download/>
MPICH may be obtained from <http://www.mpich.org/downloads/>.
Before you start
----------------
Please ensure that your environment is configured so that:
* The MPI-3 implementation's `mpiexec` and compiler wrapper scripts
are at the front of your `$PATH`. (Load the MPICH environment module, if
applicable, to accomplish this.)
* Your environment is setup to use the compilers you wish to build and use
OpenCoarrays with. (LD_LIBRARY_PATH is set, if needed, etc.)
Also, you will need the OpenCoarrays source, which you presumably already
have if you are reading this. The latest stable OpenCoarrays release can be
obtained at:
<https://github.com/sourceryinstitute/OpenCoarrays/releases/latest>
or the latest development version may be obtained from Github, either through
the web UI or using git:
git clone https://github.com/sourceryinstitute/OpenCoarrays
Configure, build and install OpenCoarrays
-----------------------------------------
OpenCoarrays does *NOT* allow in-source builds. Once you have obtained the
source code, you must create a build directory. This may be a subdirectory of
the top level source directory, or in a completely un-related location.
mkdir opencoarrays-build
cd opencoarrays-build
Next tell CMake which C and Fortran compilers you want to use and configure
the project with CMake. The Fortran compiler must be GFortran 6.1 or later.
The OpenCoarrays build system uses system introspection and other means to
ensure the version of the library built has interfaces matching the version
of GFortran specified at compile time. No CMake configuration options should
need tinkering with. A list of CMake variables that modify the OpenCoarrays
build will be given at the end of this document.
export FC=/path/to/gfortran # You can use the version on your PATH
export CC=/path/to/gcc
cmake /path/to/OpenCoarrays/source \
-DCMAKE_INSTALL_PREFIX=/path/to/desired/install/location
Next build the library, wrapper scripts, and test programs, optionally run
the tests and install OpenCoarrays:
make -j 8 # Parallel builds are supported
make test # invoke ctest
make install
Configure options
-----------------
The OpenCoarrays build system attempts to set the best possible default
settings for your Fortran compiler and MPI implementation through intro-
spection. However, some bugs or use cases may warrant tweaking the config-
uration. Each of the following options may be set using the `-D` flag to
cmake or using the CMake gui interfaces, ccmake or cmake-gui. e.g.,
cmake /path/to/source -DVAR=VALUE
Basic configure options:
CMAKE_INSTALL_PREFIX
Tell cmake where to install OpenCoarrays. Default=/usr/local
Example: cmake .. -DCMAKE_INSTALL_PREFIX=/opt/OpenCoarrays/2.2.0
CMAKE_BUILD_TYPE
Specify the build type. Default value: Release
Options to pick from are:
* Debug
* Release
* MinSizeRel
* RelWithDebInfo
* CodeCoverage
Example: cmake .. -DCMAKE_BUILD_TYPE=Debug
CAF_ENABLE_FAILED_IMAGES
Enable failed image support. Defaults to TRUE if experimental fault
tolerance features are detected to be present in the MPI
implementation. FALSE/unavailable if the MPI installation does not support it
Example: cmake .. -DCAF_ENABLE_FAILED_IMAGES=FALSE
CAF_EXPOSE_INIT_FINALIZE
Expose caf_init and caf_finalize in the OpenCoarrays extensions
module. This helps facilitate hybrid MPI-CAF programming.
Default=FALSE
Example: cmake .. -DCAF_EXPOSE_INIT_FINALIZE=TRUE
CAF_RUN_DEVELOPER_TESTS
Run tests intended for developers that trigger known failures due to
bugs, regressions and other issues. Default=FALSE unless user sets
the environment variable OPENCOARRAYS_DEVELOPER=TRUE
Example: cmake .. -DCAF_RUN_DEVELOPER_TESTS=TRUE
For a look at all of the possible CMake settings, many/most of which are
default CMake options, please run `ccmake /path/to/source` or
`cmake-gui /path/to/source`.