The default is to build libmesh "out of tree," i.e. within a separate
build directory, rather than in the source tree itself. This simplifies the process of having multiple, independently-configured builds.
cdto location of libmesh clone or extracted tarball.
- (Only if using a git clone)
git submodule update --init
make check(optional, runs the example programs and unit tests when possible)
libMesh supports the notion of multiple methods, that is, configuration settings used to build the library. The major methods supported by the library are:
opt: Fully optimized mode, with little to no error checking. No debugging symbols are included in the resulting library. Aggressive optimization flags are used.
dbg: Full debugging mode. All useful compiler warnings are enabled, as well as robust internal state checking. The asymptotic complexity of some algorithms is allowed to be worse than the design spec states.
devel: Use high levels of compiler optimization, but also enable internal state checking. Debugging symbols are included, but the resulting code is not always easy to navigate in a debugger because of compiler optimizations.
pro: Optimized code path with compiler flags suitable for use with gprof.
oprof: Optimized code path with compiler flags suitable for use with oprofile.
To select a set of methods, you can pass them to configure in one of two ways:
../configure --with-methods="opt dbg devel"
../configure METHODS="devel oprof"
METHODS="opt dbg devel" is the default.
Multiple Builds with Different Compilers
libMesh fully supports out-of-tree builds, and users are encouraged to use this feature when needed to support multiple compilers. For example, on a system where multiple compilers are available and accessible via modules, you can share the same source tree by creating a subdirectory for each compiler build:
export LIBMESH_SRC=/local/libmesh cd $LIBMESH_SRC module load gcc/6.3 cd $LIBMESH_SRC && mkdir gcc-6.3 && cd gcc-6.3 && ../configure && make && make install module swap gcc/6.3 intel/17.0 cd $LIBMESH_SRC && mkdir intel-17.0 && cd intel-17.0 && ../configure && make && make install
libMesh has no required dependencies other than a C++ compiler which fully supports the C++11 standard. To run on distributed memory platforms in parallel, you will also need MPI.
We support a large number of
optional packages. Some of these are distributed inside the
and compiled directly with libMesh, others can be used via third-party installations.
LibMesh is open source software distributed under the LGPL license, version 2.1.