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.. _BUILD:llvm:
LLVM Backend
############
.. rubric:: Requirements
* GCC (Gnu Compiler Collection)
* GNAT (Ada compiler for GCC)
* LLVM (Low-Level-Virtual Machine)
* 3.5
* 3.8
* CLANG (Compiler front-end for LLVM)
* 3.5
* 3.8
.. rubric:: Supported platforms
* :ref:`GNU/Linux with GCC <BUILD:mcode:GNULinux-GCC>`
* :ref:`Windows (x86_64) with MinGW32/MinGW64 <BUILD:mcode:Windows-WinGW>`
.. toctree::
:hidden:
GNULinux-GNAT
Windows-WinGW
GNU/Linux
---------
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`.
Mac OS?
-------
Windows MinGW 32/64
-------------------
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