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{{Warning|This page is outdated (October 2019).  For a simpler approach on building GNU Octave using a separate toolchain, see [[MXE]].}}
Building of octave together with a separate toolchain (custom built gcc/binutils/...).
Building of octave together with a separate toolchain (custom built gcc/binutils/...).


This is required mainly when the base linux distribution ships too old a version of gcc.
This is required mainly when the base linux distribution ships too old a version of gcc.
Unexperienced users should upgrade their distribution, though. Or use [[MXE]].
Unexperienced users should upgrade their distribution, though.


The main build directory will be called {{Path|/usr/local/build}}.  
The main build directory will be called {{Path|/usr/local/build}}.  
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  # do not use threads  
  # do not use threads  
  # (because I use pararrayfun from the parallel package)
  # (because I use pararrayfun from the parallel package)
  make USE_THREAD=0 CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64"
  make USE_THREAD=0 CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" CXXFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" FFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" LDFLAGS=-Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64  


One should get
One should get
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  sudo ln -s libopenblas_haswell-r0.2.19.so libopenblas.so.0
  sudo ln -s libopenblas_haswell-r0.2.19.so libopenblas.so.0
  sudo ln -s libopenblas.so.0 libopenblas.so
  sudo ln -s libopenblas.so.0 libopenblas.so
== qrupdate ==
download the latest version (1.1.2 as of this writing) to $downloads
https://sourceforge.net/projects/qrupdate/files/latest/download?source=typ_redirect
Start from a clean state
exit
bash
export PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/bin:$PATH
which gfortran
# should be /usr/local/gcc-6.2.0_binutils-2.27_isl/bin/gfortran
cd $buildroot
tar --no-same-owner -xvf $downloads/qrupdate-1.1.2.tar.gz
cd qrupdate-1.1.2/
Save the following to $downloads/qrupdate-1.1.2_Makeconf.patch
{{Code|qrupdate-1.1.2_Makeconf.patch|<pre>
--- Makeconf.orig 2016-09-20 16:33:23.061756020 +0200
+++ Makeconf 2016-09-20 16:39:47.385547117 +0200
@@ -1,26 +1,26 @@
# set this to your compiler's executable name (e.g. gfortran, g77)
FC=gfortran
# requested flags
-FFLAGS=-fimplicit-none -O3 -funroll-loops
+FFLAGS=-fimplicit-none -march=native -O3 -funroll-loops -lgfortran
# set if you need shared library
FPICFLAGS=-fPIC
# BLAS library (only required for tests)
-BLAS=-lblas
+BLAS=-lopenblas
# LAPACK library (only required for tests)
-LAPACK=-llapack
+LAPACK=
# Library version
VERSION=1.1
MAJOR=1
# The default library dir
-LIBDIR=lib
+LIBDIR=lib64
# Destination installation offset
DESTDIR=
# set default prefix to /usr/local
ifeq ($(strip $(PREFIX)),)
-  PREFIX=/usr/local
+  PREFIX=/usr/local/gcc-6.2.0_binutils-2.27_isl
endif
</pre>
}}
patch -p0 < $downloads/qrupdate-1.1.2_Makeconf.patch
make solib
as root ({{codeline|su}}, not {{codeline|sudo}},  because we want PATH to contain {{Path|/usr/local/gcc-6.2.0_binutils-2.27_isl/bin}})
make install-shlib
{{codeline|exit}} root session, then {{codeline|exit}} current bash, to return to a clean state


== arpack-ng ==
== arpack-ng ==
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  cd arpack-ng-3.4.0
  cd arpack-ng-3.4.0
  ./bootstrap
  ./bootstrap
  ./configure CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
  ./configure CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" CXXFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" FFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" LDFLAGS=-Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
   
   
  make -j 6
  make -j 6
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== FFTW ==
http://www.fftw.org/
cd $downloads
wget http://www.fftw.org/fftw-3.3.5.tar.gz
Start from a clean state
exit
bash
export PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/bin:$PATH
which gfortran
# should be /usr/local/gcc-6.2.0_binutils-2.27_isl/bin/gfortran
cd $buildroot
tar --no-same-owner -xvf $downloads/fftw-3.3.5.tar.gz
cd fftw-3.3.5/
=== Single precision ===
./configure --enable-shared --enable-sse2 --enable-avx --enable-openmp --enable-threads --enable-float CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" PKG_CONFIG_PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/pkgconfig --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
make -j6
make check
as root ({{codeline|su}}, not {{codeline|sudo}},  because we want PATH to contain {{Path|/usr/local/gcc-6.2.0_binutils-2.27_isl/bin}})
make install
exit
=== Double precision ===
./configure --enable-shared --enable-sse2 --enable-avx --enable-openmp --enable-threads CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" PKG_CONFIG_PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/pkgconfig --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
make -j6
make check
as root ({{codeline|su}}, not {{codeline|sudo}},  because we want PATH to contain {{Path|/usr/local/gcc-6.2.0_binutils-2.27_isl/bin}})
make install
exit


== GraphicsMagick ==
== GraphicsMagick ==
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Disable ''webp'' and ''jbig'' that fail tests with gcc-6.2.0
Disable ''webp'' and ''jbig'' that fail tests with gcc-6.2.0


  ./configure --without-webp --without-jbig --enable-static=no --enable-shared=yes --with-quantum-depth=16 CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" PKG_CONFIG_PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/pkgconfig --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
  ./configure --without-webp --without-jbig --enable-static=no --enable-shared=yes --with-quantum-depth=16 CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" CXXFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" FFLAGS="-O2 -march=native -L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" LDFLAGS=-Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 PKG_CONFIG_PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/pkgconfig --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl


The summary should be fine. As comparison and source of relevant informations: [[GraphicsMagick]]
The summary should be fine. As comparison and source of relevant informations: [[GraphicsMagick]]
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{{codeline|exit}} root session, then {{codeline|exit}} current bash, to return to a clean state
{{codeline|exit}} root session, then {{codeline|exit}} current bash, to return to a clean state


== Octave itself ==
The following - facultative - command avoids warnings like {{codeline|libtool: warning: '/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libgomp.la' seems to be moved}}
sudo find /usr/local/gcc-6.2.0_binutils-2.27_isl -name "*.la" -exec sed -i 's:/lib64/../lib64:/lib64:g' {} \; -print
which will replace all unnecessary {{codeline|/lib64/../lib64}} by {{codeline|/lib64}}.
cd $downloads
wget ftp://ftp.gnu.org/gnu/octave/octave-4.2.0.tar.lz
Start from a clean state
exit
bash
export PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/bin:$PATH
which gfortran
# should be /usr/local/gcc-6.2.0_binutils-2.27_isl/bin/gfortran
cd $buildroot
tar --no-same-owner -xvf $downloads/octave-4.2.0.tar.lz
cd octave-4.2.0
mkdir build-; cd $_
../configure --with-blas="/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libopenblas.so" CPPFLAGS="-I/usr/local/gcc-6.2.0_binutils-2.27_isl/include" CFLAGS="-O2 -march=native" CXXFLAGS="-O2 -march=native" FFLAGS="-O2 -march=native" LDFLAGS="-L/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64 -Wl,-rpath,/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64" PKG_CONFIG_PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/pkgconfig JAVA_HOME=/usr/lib64/jvm/java-1.8.0-openjdk-1.8.0/ --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl
make -j 6
make check
# or, for nvidia users,
xvfb-run -s "-screen 0 640x480x24" make check LD_PRELOAD=/usr/lib64/libGL.so
as root ({{codeline|su}}, not {{codeline|sudo}},  because we want PATH to contain {{Path|/usr/local/gcc-6.2.0_binutils-2.27_isl/bin}})
make install
{{codeline|exit}} root session, then {{codeline|exit}} current bash, to return to a clean state
Done.


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