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+# Maintainer: Anton Kudelin <kudelin at protonmail dot com>
+# Contributor: Eric Berquist <eric DOT berquist AT gmail>
+# Contributor: steabert <steabert@member.fsf.org>
+# Contributor: Ricardo Honorato Z.
+
+pkgname=vmd-src
+_pkgname=vmd
+pkgver=1.9.3
+pkgrel=1
+pkgdesc="Visual Molecular Dynamics"
+url="http://www.ks.uiuc.edu/Research/vmd/"
+license=('custom')
+arch=('x86_64')
+depends=('tcsh' 'tk' 'python2-numpy' 'fltk' 'ospray' 'netcdf' 'ocl-icd')
+makedepends=('gcc')
+optdepends=('openbabel: additional file formats support'
+            'sqlite: dmsplugin'
+            'optix: accelerated ray tracing for NVIDIA GPUs'
+            'cuda: NVIDIA CUDA GPU acceleration functions')
+conflicts=("$_pkgname" "$_pkgname-bin")
+# You have to download the package from the VMD url and put it in the PKGBUILD folder.
+source=("local://$_pkgname-${pkgver}.src.tar.gz"
+        "configure.patch"
+        "ospray.patch"
+        "cuda.patch"
+        "mpi.patch")
+sha256sums=('5bdc314dc836d620fe510ed4b6c3dbe3cf66525b61680ffec4e2563cf495f128'
+            'c25475d51be75c2b9e3bcd5f8d5d3ed1fd0df992f9c8020b0346c49f6c40b275'
+            '09f1cf35ebd302095a68d2b5db03e1671493411aed3f839baf2b1f44dc7e0e0d'
+            '8880006bd97f7397d5a5592aaeeb6e80530d8c6026280c1b961e43f568e12daa'
+            'e281a57831b8ff60c5a644219f0b6289d32bee239978af676474941c7d8548c0')
+
+prepare() {
+  sed -i 's/ltcl8.5/ltcl/g' plugins/Make-arch
+  cd $_pkgname-$pkgver
+  mkdir plugins
+  sed -i 's#:${LD_LIBRARY_PATH}/:${LD_LIBRARY_PATH}:#/opt/optix/lib64#g' bin/*
+  patch -p0 < ../configure.patch
+  patch -p0 < ../ospray.patch
+  patch -p0 < ../cuda.patch
+  
+  # Assuming openmpi; if not the case edit mpi.patch
+  patch -p0 < ../mpi.patch
+  export TCLINC="-I/usr/include"
+  export TCLLIB="-L/usr/lib"
+  export PLUGINDIR=$srcdir/$_pkgname-$pkgver/plugins
+  export VMDINSTALLBINDIR=$pkgdir/usr/bin
+  export VMDINSTALLLIBRARYDIR=$pkgdir/usr/lib/vmd
+  
+  # Enable CUDA if nvcc is in PATH
+  if [ $( echo -n $( which nvcc) | tail -c 4 ) == nvcc ]
+  then
+    export ACC=CUDA
+  fi
+}
+
+build() {
+  cd $srcdir/plugins
+  make -j1 LINUXAMD64 world
+  make distrib
+  cd ../$_pkgname-$pkgver
+  ./configure LINUXAMD64 OPENGL EGLPBUFFER FLTKOPENGL FLTK TK $ACC IMD OPENCL MPI XINERAMA XINPUT LIBOSPRAY LIBPNG NETCDF COLVARS TCL PYTHON PTHREADS GCC
+  cd src
+  make veryclean
+  make
+}
+
+package() {
+  cd $srcdir/$_pkgname-$pkgver
+  install -D -m644 LICENSE $pkgdir/usr/share/licenses/$pkgname/LICENSE
+  cd src; make install
+  sed -i 's#set defaultvmddir=.*#set defaultvmddir=/usr/lib/vmd#' $pkgdir/usr/bin/vmd
+}