# Contributor: 
# Maintainer: 
pkgname=fftw
pkgver=3.3.8
pkgrel=0
pkgdesc="Discrete Fourier transform (DFT) library"
url="http://www.fftw.org"
arch="all"
license="GPL-2.0-or-later"
makedepends="texinfo"
# order of the libs split functions are important because of lib naming
subpackages="$pkgname-dev $pkgname-doc $pkgname-single-libs:single
	$pkgname-long-double-libs:long_double $pkgname-double-libs:double"
srcpkgver=${pkgver//p/-pl}
source="http://www.fftw.org/$pkgname-$srcpkgver.tar.gz
	cycle.h.patch"
builddir="$srcdir/$pkgname-$srcpkgver"

_precision="single double long-double"

# disable tests for arm due to bug with gcc >= 9
# see https://github.com/FFTW/fftw3/issues/213
case "$CARCH" in
	armv7) options="$options !check" ;;
	armhf) options="$options !check" ;;
esac

prepare() {
	default_prepare

	cd "$builddir"
	local i; for i in $_precision; do
		cp -r "$builddir" $srcdir/$i
	done
}

build() {
	local _openmp=

	local i; for i in $_precision; do
		case "$i" in
			single) _cf="--enable-single";;
			double) _cf="";;
			long-double) _cf="--enable-long-double";;
		esac

		case "$i--$CARCH" in
			single--x86_64 | double--x86_64)
				_cf="$_cf --enable-sse2 --enable-avx";;
			single--arm* | single--aarch64)
				_cf="$_cf --enable-neon";;
		esac

		msg "Building for $i precision ($_cf)"
		cd "$srcdir"/$i
		./configure \
			--build=$CBUILD \
			--host=$CHOST \
			--prefix=/usr \
			--sysconfdir=/etc \
			--mandir=/usr/share/man \
			--infodir=/usr/share/info \
			--enable-shared \
			--enable-threads \
			$_openmp \
			$_cf
		make
	done
}

check() {
	local i; for i in $_precision; do
		cd "$srcdir"/$i
		make check
	done
}

package() {
	local i; for i in $_precision; do
		cd "$srcdir"/$i
		make DESTDIR="$pkgdir" install
	done
}

single() {
	mkdir -p "$subpkgdir"/usr/lib
	mv "$pkgdir"/usr/lib/libfftw3f*.so* \
		"$subpkgdir"/usr/lib/
}

double() {
	mkdir -p "$subpkgdir"/usr/lib
	mv "$pkgdir"/usr/lib/libfftw3*.so* \
		"$subpkgdir"/usr/lib/
}

long_double() {
	mkdir -p "$subpkgdir"/usr/lib
	mv "$pkgdir"/usr/lib/libfftw3l*.so* \
		"$subpkgdir"/usr/lib/
}

sha512sums="ab918b742a7c7dcb56390a0a0014f517a6dff9a2e4b4591060deeb2c652bf3c6868aa74559a422a276b853289b4b701bdcbd3d4d8c08943acf29167a7be81a38  fftw-3.3.8.tar.gz
7da269fc43dabd02ae6fad2ebad92b07e06825b6b7c6f8987fc6444f02e0d55080db4ba6e401760e071f5c33015faf8c710f643636cab7a79bdf1af5d434dbb4  cycle.h.patch"