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MXE

2,269 bytes added, 9 August
Updating config options according to https://octave.1599824.n4.nabble.com/mxe-octave-status-td4685260.html.
Based on [https://hg.octave.org/mxe-octave MXE-Octave] was forked 2012 from the [httphttps://mxe.cc/ MXEproject] project there and is an useful for building Octave in the following scenarios<ref>[httphttps://hg.octave.org/mxe-octave /file/6836b2f08479/README MXE-OctaveREADME] text by [[User:jwe|jwe]] fork available to allow cross compiling Octave to various target systems.</ref>:
There is some further information # Cross-compilation for using mxe-octave to build an MS Windows installer here: (see also [[Windows_InstallerWindows Installer]]) and other platforms.# Building Octave on outdated Linux systems (e.g. only an old GCC version is available).# Building Octave without root permission.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 [[Examples:Category:Installation]]for other install options.}}
To compile === Example of compiling MXE-Octave on your Linux system for your Linux system.===
# Download [http://hg.octave.org/mxe-octave MXE-Octave] as a compressed file.# Unpack it in ~ or somewhere suitable.# cd into the directory (called ~/mxe-octave-123456789 or similiar).# ./autoconf# ./configure --enable-64 --enable-native-build --enable-pic-flag host_alias=gnu-linux --enable-openblas --enable-jit# make# make openblas# Octave will exist in ~/mxe-octave-123456789/usr/bin# Add to your .bashrc file: alias octave=~/mxe-octave-123456789/usr/bin/octave== Preparation ====
# [[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 ====
 
For a comprehensive list of configuration options with a short explanation, type <code>./configure --help</code>. See also the [[#Known issues|known issues]] below.
 
<syntaxhighlight lang="text">
./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
 
==== 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]]

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