# Contributor: Isaac Dunham <ibid.ag@gmail.com>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Maintainer: Isaac Dunham <ibid.ag@gmail.com>
pkgname=openblas
_pkgname=OpenBLAS
pkgver=0.2.18
pkgrel=3
pkgdesc="A fast BSD-licensed BLAS based on gotoBLAS2, with LAPACK"
url="http://www.openblas.net"
arch="all"
license="BSD"
depends=""
depends_dev="gfortran"
makedepends="$depends_dev perl linux-headers"
subpackages="$pkgname-dev $pkgname-doc"
source="$pkgname-$pkgver.tar.gz::http://github.com/xianyi/$_pkgname/archive/v$pkgver.tar.gz
	0001-Use-strsignal-instead-of-sys_siglist.patch
	"
builddir="$srcdir/$_pkgname-$pkgver"
_builddir64="$builddir-64"

# USE_OPENMP=0: see GCC bug 60035
# NO_AFFINITY: don't expect to work on musl, also breaks R and not
#              recommended for Julia
_flags="USE_OPENMP=0
	NO_LAPACK=0
	MAJOR_VERSION=3
	NO_AFFINITY=1
	"
case "$CARCH" in
x86_64 | aarch64)
	subpackages="$subpackages $pkgname-ilp64"
	_flags="$_flags NUM_THREADS=32"  # match kernel's CONFIG_NR_CPUS
	_ilp64=true
;;
*)
	_flags="$_flags NUM_THREADS=8"  # 32bit machines usually have less cores
	_ilp64=false
;;
esac

# DYNAMIC_ARCH is supported on x86* only, see https://github.com/xianyi/OpenBLAS/issues/709
case "$CARCH" in
x86*) _flags="$_flags TARGET=core2 DYNAMIC_ARCH=1";;
armhf) _flags="$_flags TARGET=ARMV7 DYNAMIC_ARCH=0";;
aarch64) _flags="$_flags TARGET=ARMV8 DYNAMIC_ARCH=0";;
*) _flags="$_flags DYNAMIC_ARCH=0";;
esac

# Flags for ILP64 variant.
_flags64="$_flags
	INTERFACE64=1
	SYMBOLSUFFIX=64_"

prepare() {
	default_prepare || return 1

	cp -ar "$builddir" "$_builddir64"
}

build() {
	CFLAGS= make -C "$builddir" \
		$_flags CFLAGS="$CFLAGS" PREFIX=/usr || return 1

	if $_ilp64; then
		msg "Building with ILP64..."
		CFLAGS= make -C "$_builddir64" \
			$_flags64 CFLAGS="$CFLAGS" PREFIX=/usr || return 1
	fi
}

package() {
	if $_ilp64; then
		make -C "$_builddir64" $_flags64 \
			PREFIX="$pkgdir/usr" install || return 1
	fi

	cd "$builddir"

	make $_flags PREFIX="$pkgdir/usr" install || return 1

	# Remove reference to $pkgdir.
	sed -i "s|$pkgdir||" "$pkgdir"/usr/lib/cmake/$pkgname/OpenBLASConfig.cmake

	mkdir -p "$pkgdir"/usr/share/doc/$pkgname
	install -m 0644 Changelog.txt TargetList.txt USAGE.md \
		"$pkgdir"/usr/share/doc/$pkgname/ || return 1

	install -Dm 0644 LICENSE \
		"$pkgdir"/usr/share/licenses/$pkgname/LICENSE
}

ilp64() {
	pkgdesc="$pkgdesc (ILP64)"
	arch="x86_64 aarch64"

	mkdir -p "$subpkgdir"/usr/lib
	mv "$pkgdir"/usr/lib/libopenblas64_* "$subpkgdir"/usr/lib/
}

md5sums="805e7f660877d588ea7e3792cda2ee65  openblas-0.2.18.tar.gz
ddce6ae8c2af85ebdd14e9150960d1c6  0001-Use-strsignal-instead-of-sys_siglist.patch"
sha256sums="7d9f8d4ea4a65ab68088f3bb557f03a7ac9cb5036ef2ba30546c3a28774a4112  openblas-0.2.18.tar.gz
4e662d5dd5d03e0067c856d3c359d4306a8fb1ad66c2a70a7cf851decf5fdea3  0001-Use-strsignal-instead-of-sys_siglist.patch"
sha512sums="224990959ead6247613519f52447c31968170349a0040e746862b948c851166499050f5db7cefc66f9c1695262457980ae8d0e49b14f3442267f2a43f5a14e47  openblas-0.2.18.tar.gz
d3dd7cad2c0bc5414642cf51a46bc57e681c4449bd829bf304c743c44c53f29d90ba0c43233bf5a7cce3e6b057d1c1cef27d0ccffecb50125993b34c913477c8  0001-Use-strsignal-instead-of-sys_siglist.patch"