configure.win

if test -z "$OCL"; then
   echo ''
   echo 'ERROR: OCL not set!'
   echo ''
   echo 'You will need a working OpenCL SDK with headers'
   echo 'and libraries for both i386 and x64'
   echo ''
   echo 'Set OCL to the root of the SDK'
   echo ''
   echo 'You can also set individial variables OCLINC,'
   echo 'OCL32LIB and OCL64LIB. Note that they are expected'
   echo 'to be valid compiler flags. If they are not set,'
   echo 'the default SDK layout ($SDK/include, $SDK/lib/x64)'
   echo 'will be assumed.'
   echo ''
   exit 1
fi

DARCH=$(echo $R_ARCH | tr -d /)
if test -z "$DARCH"; then
   # R without R_ARCH is assumed to be x86_64 native
   DARCH=x64
   # if OCLLIB is set we pass it to OCL64LIB downstream
   if test -n "$OCLLIB"; then
      OCL64LIB="$OCLLIB"
   fi
fi

echo ''
echo " === configurig OpenCL for $DARCH =="
echo ''
echo " OCL=$OCL"
echo ''

if test -z "$OCL64LIB"; then
  # some SDKs are single-arch
  if test -e "$OCL/lib/OpenCL.lib" -a ! -e "$OCL/lib/x64/OpenCL.lib"; then
    echo SDK appears to include only one architecture, assuming it is 64-bit
    OCL64LIB="$OCL/lib/OpenCL.lib"
  else
    OCL64LIB="$OCL/lib/x64/OpenCL.lib"
  fi
  echo OCL64LIB not set, assuming $OCL64LIB
  if test "$DARCH" = x64 -a ! -e "$OCL64LIB"; then
    echo "WARNING: $OCL64LIB not found! Check your OCL and OCL64LIB settings!" >&2
  fi
fi
if test -z "$OCL32LIB"; then
   OCL32LIB="$OCL/lib/x86/OpenCL.lib"
   echo OCL32LIB not set, assuming $OCL32LIB
fi
if test -z "$OCLINC"; then
   OCLINC="-I$OCL/include"
   echo OCLINC not set, assuming $OCLINC
fi

echo ''

if test "$R_ARCH" = i386; then
   echo ' --- Compiling 32-bit ---'
   OCLLIB="$OCL32LIB"
else
   echo ' --- Compiling 64-bit ---'
   OCLLIB="$OCL64LIB"
fi

echo OCL=$OCL
echo PKG_CPPFLAGS=$OCLINC
echo PKG_LIBS=$OCLLIB

echo ''

echo "PKG_CPPFLAGS='$OCLINC'" > src/Makevars.win
echo "PKG_LIBS='$OCLLIB'" >> src/Makevars.win
# see src/Makevars for explanation:
echo 'all: $(SHLIB)' >> src/Makevars.win
echo '	mv $< R_OpenCL$(SHLIB_EXT)' >> src/Makevars.win