academic/flann: Fix building with the newer cmake, cleanups.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

Signed-off-by: Andrew Clemons <andrew.clemons@gmail.com>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

academic/flann/flann.SlackBuild

@@ -82,6 +82,12 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+sed -i "s|setup\.py install|setup.py install --root=$PKG --optimize=1|" src/python/CMakeLists.txt
+
+touch src/cpp/empty.cpp
+sed -i -e 's/flann_cpp SHARED \"\"/flann_cpp SHARED \"empty\.cpp\"/g' src/cpp/CMakeLists.txt
+sed -i -e 's/flann SHARED \"\"/flann SHARED \"empty\.cpp\"/g' src/cpp/CMakeLists.txt
+
 mkdir -p build
 cd build
   cmake \
@@ -89,15 +95,23 @@ cd build
     -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DLIB_SUFFIX=${LIBDIRSUFFIX} \
+    -DBUILD_MATLAB_BINDINGS=OFF \
+    -DBUILD_PYTHON_BINDINGS=ON \
+    -DPYTHON_EXECUTABLE=/usr/bin/python3 \
+    -DBUILD_TESTS=OFF \
+    -DBUILD_EXAMPLES=OFF \
     -DCMAKE_BUILD_TYPE=Release ..
   make
   make install DESTDIR=$PKG
 cd ..
+rm -fR $PKG/usr/share/$PRGNAM
 
 find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
   | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
 
+rm -fR $PKG/usr/share/doc
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp COPYING ChangeLog README.md $PKG/usr/doc/$PRGNAM-$VERSION
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
 mkdir -p $PKG/install