Octave and separate toolchain

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. Unexperienced users should upgrade their distribution, though.

The main build directory will be called /usr/local/build. It was first created by root, and then changed to be owned by the user who will perform compilations. You might want change this to another directory in your $HOME for instance.

export buildroot=/usr/local/build

We will need a directory to hold downloaded files

export downloads=$buildroot/downloads

mkdir -p $buildroot/downloads

gcc toolchain

This part is largely inspired by this answer

cd $buildroot
# work in a subshell, to isolate mistakes
bash
# check that PATH and LD_RUN_PATH are normal
echo $PATH
echo $LD_RUN_PATH

cd $downloads
wget ftp://ftp.gnu.org/gnu/binutils/binutils-2.27.tar.bz2
wget ftp://ftp.gnu.org/gnu/gcc/gcc-6.2.0/gcc-6.2.0.tar.bz2
wget ftp://ftp.gnu.org/gnu/mpfr/mpfr-3.1.5.tar.xz
wget ftp://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz
wget ftp://ftp.gnu.org/gnu/gmp/gmp-6.1.1.tar.xz
wget http://isl.gforge.inria.fr/isl-0.17.tar.xz

cd $buildroot
tar --no-same-owner -xvf $downloads/binutils-2.27.tar.bz2
tar --no-same-owner -xvf $downloads/gcc-6.2.0.tar.bz2
tar --no-same-owner -xvf $downloads/mpfr-3.1.5.tar.xz
tar --no-same-owner -xvf $downloads/mpc-1.0.3.tar.gz
tar --no-same-owner -xvf $downloads/gmp-6.1.1.tar.xz
tar --no-same-owner -xvf $downloads/isl-0.17.tar.xz

cd $buildroot/gcc-6.2.0
ln -s ../mpfr-3.1.5 mpfr
ln -s ../mpc-1.0.3 mpc
ln -s ../gmp-6.1.1 gmp
ln -s ../isl-0.17/ isl
# Now symlink everything from the binutils dir which doesn't exist in the gcc dir,
# so anything which already exists will take priority but the
# binutils tools will look be visible to the build:
for file in ../binutils-2.27/* ; do ln -s "${file}" ; done
# errors ending with "File exists" are normal

Now we are ready to build the toolchain

cd $buildroot
mkdir gcc-6.2.0_isl_build; cd $_
../gcc-6.2.0/configure --prefix=/usr/local/gcc-6.2.0_binutils-2.27_isl --disable-nls --enable-languages=c,c++,fortran,java --disable-multilib
make -j 6 bootstrap
sudo make install
# see what has been installed
ls /usr/local/gcc-6.2.0_binutils-2.27_isl/bin

OpenBLAS

We need an optimized BLAS library, such as OpenBLAS

cd $downloads
wget -O OpenBLAS-0.2.19.tar.gz http://github.com/xianyi/OpenBLAS/archive/v0.2.19.tar.gz

cd $buildroot
tar --no-same-owner -xvf $downloads/OpenBLAS-0.2.19.tar.gz
cd OpenBLAS-0.2.19/

bash
export PATH=/usr/local/gcc-6.2.0_binutils-2.27_isl/bin:$PATH
# check
which gcc
# should be /usr/local/gcc-6.2.0_binutils-2.27_isl/bin/gcc
which gfortran
# should be /usr/local/gcc-6.2.0_binutils-2.27_isl/bin/gfortran

# do not use threads 
# (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 -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

OpenBLAS build complete. (BLAS CBLAS LAPACK LAPACKE)

 OS               ... Linux             
 Architecture     ... x86_64               
 BINARY           ... 64bit                 
 C compiler       ... GCC  (command line : gcc)
 Fortran compiler ... GFORTRAN  (command line : gfortran)
 Library Name     ... libopenblas_haswell-r0.2.19.a (Single threaded)  

Checking the runpath:

ldd libopenblas.so
       linux-vdso.so.1 (0x00007fff961fc000)
       libm.so.6 => /lib64/libm.so.6 (0x00007f3ee88cb000)
       libgfortran.so.3 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libgfortran.so.3 (0x00007f3ee85a3000)
       libc.so.6 => /lib64/libc.so.6 (0x00007f3ee81f9000)
       libquadmath.so.0 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/../lib64/libquadmath.so.0 (0x00007f3ee7fb9000)
       libgcc_s.so.1 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/../lib64/libgcc_s.so.1 (0x00007f3ee7da2000)
       /lib64/ld-linux-x86-64.so.2 (0x00007f3ee9ad6000)

Manual installation

sudo cp libopenblas.a libopenblas_haswell-r0.2.19.a libopenblas_haswell-r0.2.19.so /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64
cd /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/
sudo ln -s libopenblas_haswell-r0.2.19.so libopenblas.so.0
sudo ln -s libopenblas.so.0 libopenblas.so

arpack-ng

https://github.com/opencollab/arpack-ng/releases

cd $downloads
wget -O arpack-ng-3.4.0.tar.gz https://github.com/opencollab/arpack-ng/archive/3.4.0.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/arpack-ng-3.4.0.tar.gz
cd arpack-ng-3.4.0
./bootstrap
./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 check
 # TOTAL: 12
 # PASS:  12

# check libraries
ldd ./SRC/.libs/libarpack.so
       linux-vdso.so.1 (0x00007fff1f38c000)
       libopenblas.so.0 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libopenblas.so.0 (0x00007f80c79d8000)
       libgfortran.so.3 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libgfortran.so.3 (0x00007f80c76b0000)
       libm.so.6 => /lib64/libm.so.6 (0x00007f80c7368000)
       libgcc_s.so.1 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libgcc_s.so.1 (0x00007f80c7151000)
       libquadmath.so.0 => /usr/local/gcc-6.2.0_binutils-2.27_isl/lib64/libquadmath.so.0 (0x00007f80c6f11000)
       libc.so.6 => /lib64/libc.so.6 (0x00007f80c6b67000)
       /lib64/ld-linux-x86-64.so.2 (0x00007f80c892e000)

as root (su, not sudo, because we want PATH to contain /usr/local/gcc-6.2.0_binutils-2.27_isl/bin)

make install

To be continued...