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[https://hg.octave.org/mxe-octave MXE-Octave] was forked 2012 from the [https://mxe.cc/ MXE project] and is useful for building Octave in the following scenarios<ref>[https://hg.octave.org/mxe-octave/file/6836b2f08479/README MXE-Octave README] text by [[User:jwe|jwe]].</ref>:
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[https://hg.octave.org/mxe-octave MXE-Octave] is based on the [https://mxe.cc/ MXE project] and is useful in the following scenarios:
  
# Cross-compilation for MS Windows (see also [[Windows Installer]]) and other platforms.
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# Cross-compilation for MS Windows (see also [[Windows_Installer]]) and other platforms.
 
# Building Octave on outdated Linux systems (e.g. only an old GCC version is available).
 
# Building Octave on outdated Linux systems (e.g. only an old GCC version is available).
 
# Building Octave without root permission.
 
# Building Octave without root permission.
  
{{Warning|MXE-Octave is '''not''' the best choice for building Octave, if your system already provides recent versions of GCC and other required build dependencies. See [[:Category:Installation]] for other install options.}}
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{{Warning|MXE-Octave is '''not''' the best choice for building Octave, if your system already provides recent versions of GCC and other required build dependencies.}}
  
=== Example of compiling MXE-Octave ===
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=== Examples of compiling Octave for different platforms ===
  
==== Preparation ====
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* '''Compiling for your Linux system'''
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# Download [http://hg.octave.org/mxe-octave MXE-Octave] as a compressed file.
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# Unpack it in ~ or somewhere suitable.
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# Check you have all the [http://mxe.cc/#requirements requirements], gfortran and libgl2ps-dev.
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# cd into the directory (called ~/mxe-octave-123456789 or similiar).
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# Type: ./bootstrap
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# Type: ./configure --enable-64 --enable-native-build --enable-pic-flag host_alias=gnu-linux --enable-openblas --enable-jit
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# Type: make
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# Type: make openblas
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# cd usr/lib
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# mv libblas.so libblas.so.reference
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# ln -s libopenblas.so libblas.so
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# Octave will exist in ~/mxe-octave-123456789/usr/bin
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# Add to your .bashrc file: alias octave=~/mxe-octave-123456789/usr/bin/octave
  
# [[Windows_Installer#Installing_requirements_of_MXE_Octave|Install all requirements of MXE Octave]].
 
# Decide for an installation directory (e.g. {{path|~/mxe-octave}}).
 
# <code>cd ~</code>
 
# <code>hg clone https://hg.octave.org/mxe-octave mxe-octave</code>
 
# <code>cd mxe-octave</code>
 
# <code>./bootstrap</code>
 
  
==== Configuration ====
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=== Note for gnuplot ===
  
For a comprehensive list of configuration options with a short explanation, type <code>./configure --help</code>.  See also the [[#Known issues|known issues]] below.
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The gnuplot built by mxe-octave does not support cairo based terminals and lua/tikz terminals.
 
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If you want uses those feature, prepare gnuplot with those features and points its location setting to
<syntaxhighlight lang="text">
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"gnuplot_binary" like
./configure \
 
    --prefix=$HOME/mxe-octave \
 
    --enable-native-build \
 
    --enable-octave=release \
 
    --enable-64 \
 
    --enable-binary-packages \
 
    --enable-devel-tools \
 
    --enable-fortran-int64 \
 
    --enable-lib64-directory \
 
    --enable-openblas \
 
    --enable-pic-flag \
 
    --disable-system-fontconfig \
 
    --disable-system-gcc \
 
    --disable-system-opengl \
 
    --disable-system-x11-libs \
 
    --with-ccache \
 
    gnu-linux
 
</syntaxhighlight>
 
 
 
==== Build ====
 
 
 
<code>make -j3 JOBS=2 all openblas</code> Adapt the values of the variables <code>-j</code> (parallel package builds) and <code>JOBS</code> (parallel build jobs) to your needs.
 
 
 
==== Replace reference BLAS by OpenBLAS ====
 
 
 
In general using the [https://www.openblas.net/ OpenBLAS] library results in faster matrix-vector operations compared to the reference BLAS library.
 
 
 
# <code>cd ~/mxe-octave/usr/lib</code>
 
# <code>mv libblas.so libblas.so.reference</code>
 
# <code>ln -s libopenblas.so libblas.so</code>
 
 
 
==== Run ====
 
 
 
# MXE-Octave will exist in {{path|~/mxe-octave/usr/bin}}
 
# Add the command <code>octave</code> as alias to your {{path|.bashrc}} file: <code>alias octave=~/mxe-octave/usr/bin/octave</code>
 
# Start MXE-Octave by typing <code>octave</code>.
 
 
 
=== Known issues ===
 
 
 
==== gnuplot ====
 
 
 
The gnuplot built by MXE-Octave does not support cairo based terminals and lua/tikz terminals.
 
If you want uses those features, prepare gnuplot with those features and type in the Octave command prompt
 
  
 
   >> gnuplot_binary /usr/bin/gnuplot
 
   >> gnuplot_binary /usr/bin/gnuplot
 
==== Build errors on older systems ====
 
 
On some older systems, it might be useful to consider adding the configuration options
 
* <code>--disable-docs</code>
 
* <code>--disable-java</code>
 
in case of building errors.
 
 
 
=== References ===
 
 
<references/>
 
  
 
[[Category:Building]]
 
[[Category:Building]]

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