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.. _BUILD:mcode:GNULinux-GNAT:
GNU/Linux with GCC/GNAT
#######################
On Linux, GHDL is configured by ``configure`` and build by ``make``.
* First, GHDL needs to be configured. It is common to specify a PREFIX
(installation directory like ``/usr/local`` or ``/opt/ghdl``). Without any
other option, ``configure`` select `mcode` as backend.
* Next, ``make`` starts the compilation process.
* Finally, ``make install`` installs GHDL into the installation directory
specified by PREFIX. You may need super user privileges (``sudo ...``).
.. rubric:: Example:
.. code-block:: Bash
cd <ghdl>
mkdir build
cd build
../configure --prefix=PREFIX
make
sudo make install
.. TODO::
You need to install LLVM (usually depends on :samp:`libedit`, see :ghdlsharp`29`). The supported versions are 3.5 till 3.9, but debugging is only supported with LLVM 3.5.
- First configure GHDL with the proper arg :samp:`./configure --with-llvm-config`. If :samp:`llvm-config` is not in your path, you can specify it: :samp:`./configure --with-llvm-config=LLVM_INSTALL/bin/llvm-config`.
.. HINT::
If you want to have stack backtraces on errors (like assert failure or index of out bounds), you need to configure and build :samp:`libbacktrace` from GCC (you don't need to configure GCC). Then add the following arg to configure: :samp:`--with-backtrace-lib=/path-to-gcc-build/libbacktrace/.libs/libbacktrace.a`
- Then build with :samp:`make` and install with :samp:`make install`.
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