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# Maintainer: Ronald van Haren <ronald@archlinux.org>
# Contributor: Chirantan Ekbote <chirantan.ekbote at gmail.com>
# Contributor: Kringel

pkgname=eigen
pkgver=3.4.0
pkgrel=2
pkgdesc='Lightweight C++ template library for vector and matrix math, a.k.a. linear algebra'
arch=(any)
url='https://eigen.tuxfamily.org'
license=(MPL-2.0 Apache-2.0 BSD-3-Clause Minpack 'LGPL-2.1-only OR LGPL-2.1-or-later')
makedepends=(cmake freeglut 
gcc-fortran 
fftw suitesparse boost)
source=(https://gitlab.com/libeigen/eigen/-/archive/$pkgver/$pkgname-$pkgver.tar.gz
        $pkgname-vectorized-reduction-half.patch)
sha256sums=('8586084f71f9bde545ee7fa6d00288b264a2b7ac3607b974e54d13e7162c1c72'
            'SKIP')

prepare() {
  cd $pkgname-$pkgver
  # Eigen installs all files in source dir, including the backup files of patch.
  # With the first flag we disable the use of backup files.
  patch --no-backup-if-mismatch -Np1 -i ../$pkgname-vectorized-reduction-half.patch
}

build() {
  cmake -B build -S $pkgname-$pkgver \
    -DCMAKE_INSTALL_PREFIX=/usr
}

package() {
  DESTDIR="$pkgdir" cmake --install build

  # install custom licenses
  install -Dm644 $pkgname-$pkgver/COPYING.* -t "$pkgdir/usr/share/licenses/$pkgname"
}