Installation of Mercurium legacy compiler
=========================================
.. index::
    double: Mercurium; installation; legacy compiler

.. important::  Mercurium is the OmpSs-2 legacy compiler and is unsupported now. **You do not have to install it to use OmpSs-2**. We recommend to use the LLVM-based compiler. Check :ref:`InstallationLLVM` and :ref:`LLVMBasedCompiler`.

You can find the build requirements, the configuration flags and the
instructions to build Mercurium in the following link:
https://github.com/bsc-pm/mcxx

You should be able to compile and install Mercurium with the following commands::

     $ autoreconf -fiv
     $ ./configure --prefix=$INSTALLATION_PREFIX --enable-ompss-2 --with-nanos6=$INSTALLATION_PREFIX
     $ make
     $ make install