openbabel: fix compilation errors (#16090)

- Disable maeparser as it is broken with CMake
- Added missing dependencies

var/spack/repos/builtin/packages/openbabel/package.py

@@ -31,9 +31,13 @@ class Openbabel(CMakePackage):
     depends_on('swig@2.0:', type='build', when='+python')
     depends_on('boost')
     depends_on('cairo')       # required to support PNG depiction
+    depends_on('pango')       # custom cairo requires custom pango
     depends_on('eigen@3.0:')  # required if using the language bindings
     depends_on('libxml2')     # required to read/write CML files, XML formats
     depends_on('zlib')        # required to support reading gzipped files
+    depends_on('rapidjson')   # required to support JSON
+    depends_on('libsm')
+    depends_on('uuid')
 
     # Needed for Python 3.6 support
     patch('python-3.6-rtld-global.patch', when='@:2.4.1+python')
@@ -54,6 +58,8 @@ def cmake_args(self):
         else:
             args.append('-DPYTHON_BINDINGS=OFF')
 
+        args.append('-DWITH_MAEPARSER=OFF')  # maeparser is currently broken
+
         return args
 
     @run_after('install')