Simplify build and link HDF5 libraries

Removed custom BuildExtCommand class from setup.py, simplifying the
build process by relying on standard build_ext behavior. The custom
command handling of submodule initialization and build extension
modifications were deemed unnecessary. Additionally, extended the
library dependencies to include 'hdf5_cpp' and 'hdf5' to ensure correct
linking for HDF5 support. This change makes the build process more
straightforward and maintainable.

setup.py

@@ -8,45 +8,18 @@ from Cython.Build import cythonize
 
 os.environ['CXX'] = 'h5c++'
 
-class BuildExtCommand(build_ext):
-    """Custom build_ext command to ensure that the submodule is retrieved and built."""
-
-    def build_extensions(self):
-        rpath_flags = ['-Wl,-rpath,/usr/lib/']
-        for ext in self.extensions:
-            ext.extra_compile_args = rpath_flags
-            ext.extra_link_args = rpath_flags
-        build_ext.build_extensions(self)
-
-        super().build_extensions()
-
-    def run(self):
-        if not os.path.exists('extern/limedriver/src'):
-            self.clone_limedriver()
-
-        super().run()
-
-    def clone_limedriver(self):
-        subprocess.check_call(['git', 'submodule', 'init'], shell=True)
-        subprocess.check_call(['git', 'submodule', 'update'], shell=True)
-
 ext_modules = [
     Extension(
         'limedriver.binding',
         sources=['src/limedriver/limedriver.pyx', 'extern/limedriver/src/limedriver.cpp'],
         include_dirs=["extern/limedriver/src/", "/usr/include/hdf5/serial/"], # TODO: This is REALLY ugly.
         library_dirs=["/usr/lib/"],
-        libraries=["LimeSuite"],
+        libraries=["LimeSuite", "hdf5_cpp", "hdf5"],
         language="c++",
     ),
 ]
 
 setup(
     name='limedriver',
-    
-    cmdclass={
-        'build_ext': BuildExtCommand,
-    },
-
     ext_modules=cythonize(ext_modules),
 )