#! /bin/bash

# fftw
# Source: ftp://ftp.fftw.org/pub/fftw/fftw-3.3.10.tar.gz
#
# $BUILD = Directory to temporarily install
# $PKGS  = Directory to store built packages
#
# DEPS
# Required:     NONE
# Recommended:  NONE
# Optional:     NONE

# If optimizing with GCC
export  CFLAGS="-march=native -pipe "
export CFLAGS+="-O3 -ffat-lto-objects -flto=4 "
export LDFLAGS="-flto=4 -Wl,-O2 -Wl,--as-needed "

case $(uname -m) in
   x86_64)         export ECONF="--enable-sse2 --enable-avx" ;;
   arm* | aarch64) export ECONF="--enable-neon"              ;;
esac &&
patch -Np1 -i ../patches/fftw-alpine/cycle.h.patch &&
autoreconf -fvi &&

mkdir build-double && cd  build-double &&
../configure --prefix=/usr   \
            --enable-shared  \
            --enable-threads ${ECONF} $BUILDTRUPLE &&
read -p "Compile?" && make -j2 && cd .. &&

mkdir build-long-double && cd build-long-double &&
../configure --prefix=/usr   \
            --enable-shared  \
            --enable-threads \
            --enable-long-double $BUILDTRUPLE &&
read -p "Compile?" && make -j2 && cd .. &&

mkdir build-single && cd build-single &&
../configure --prefix=/usr   \
            --enable-shared  \
            --enable-threads \
            --enable-float ${ECONF} $BUILDTRUPLE  &&
read -p "Compile?" && make -j2 && cd .. &&

for f in double long-double single; do
	cd build-${f}
	sudo -S make DESTDIR=$BUILD install
	cd ..
done &&

sudo -S mkdir -pv /BMAN/install
sudo -S mkdir -pv /BMAN/usr
sudo -S mv $BUILD/usr/share /BMAN/usr/ 

cd $BUILD && sudo -S mkdir -v ${BUILD}/install &&
cat > /tmp/slack-desc << "EOF"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in.  You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':' except on otherwise blank lines.

    |-----handy-ruler------------------------------------------------------|
fftw: fftw (Fastest Fourier Transform in the West)
fftw: 
fftw: FFTW is a free collection of fast C routines for computing the
fftw: Discrete Fourier Transform in one or more dimensions. It includes
fftw: complex, real, symmetric, and parallel transforms, and can handle
fftw: arbitrary array sizes efficiently. FFTW is typically faster than
fftw: other publicly-available FFT implementations, and is even
fftw: competitive with vendor-tuned libraries.
fftw:
fftw: Homepage: http://www.fftw.org/
fftw:
EOF
sudo -S mv -v /tmp/slack-desc install/ &&
sudo -S makepkg -l y -c n $PKGS/fftw-3.3.10-$(uname -m)-mlfs.txz &&
cd /BMAN
cat > /tmp/slack-desc << "EOF"
fftw-doc: Manuals for fftw (Fastest Fourier Transform in the West)
fftw-doc:
fftw-doc: A free collection of fast C routines for computing the Discrete
fftw-doc: Fourier Transform in one or more dimensions.
fftw-doc:
fftw-doc: http://www.fftw.org/
fftw-doc:
EOF
sudo -S mv -v /tmp/slack-desc install/ &&
sudo -S makepkg -l y -c n $PKGS/fftw-doc-3.3.10-noarch-mlfs.txz
sudo -S rm -rf /BMAN/*
sudo -S rm -rf ${BUILD}/*