# Description: C subroutine library for computing discrete Fourier transform.
# URL: http://www.fftw.org/
# Maintainer: Danny Rawlins, crux at romster dot me
# Depends on: gcc-fortran

name=fftw
version=3.3.8
release=1
source=(http://www.fftw.org/$name-$version.tar.gz)

build() {
	cd $name-$version

	local config="
F77=gfortran
--prefix=/usr
--enable-threads
--with-gnu-ld
--enable-shared
--enable-openmp"

	# use upstream default CFLAGS while keeping our -march/-mtune
	CFLAGS+=" -O3 -fomit-frame-pointer -malign-double -fstrict-aliasing -ffast-math"

	# compiling single precision library
	./configure \
		$config \
		--enable-single \
		--enable-sse \
		--enable-avx

	make
	make DESTDIR=$PKG install
	make clean

	# compiling double precision library
	./configure \
		$config \
		--enable-sse2 \
		--enable-avx

	make
	make DESTDIR=$PKG install
	make clean

       # compiling long double precision library
	./configure \
		$config \
		--enable-long-double

	make
	make DESTDIR=$PKG install
	make clean

	# compiling quad precision library
	./configure \
		$config \
		--enable-quad-precision

	make
	make DESTDIR=$PKG install

	# clean up
	rm -r $PKG/usr/share/info
}