warnings on form compilation about ffcx

[mscroggs]

This is fixed in #214

[francesco-ballarin]

Thanks @mscroggs

[francesco-ballarin]

Apologies, I am still getting a few warnings, e.g.

fem/test_fem_pipeline.py::test_manufactured_vector1[2-family2-UnitCubeMesh_tetra.xdmf] libffcx_elements_6c75e6c6ebf2192d2b71a03acf31ad01958ac2a8.c: In function ‘transform_values_element_e0ab8018f9f5e6a669d6bb8d9042847526b01d53’:
libffcx_elements_6c75e6c6ebf2192d2b71a03acf31ad01958ac2a8.c:2362:10: warning: unused variable ‘result’ [-Wunused-variable]
   double result;
          ^~~~~~
libffcx_forms_ed94bbf722373c9ec06f0d2b8b80dfc97cb2d092.c: In function ‘transform_values_element_e0ab8018f9f5e6a669d6bb8d9042847526b01d53’:
libffcx_forms_ed94bbf722373c9ec06f0d2b8b80dfc97cb2d092.c:3403:10: warning: unused variable ‘result’ [-Wunused-variable]
   double result;
          ^~~~~~
libffcx_forms_a22b68dffef89e1db16d5f18ce2bd4e9d43fbb82.c: In function ‘transform_values_element_e0ab8018f9f5e6a669d6bb8d9042847526b01d53’:
libffcx_forms_a22b68dffef89e1db16d5f18ce2bd4e9d43fbb82.c:3403:10: warning: unused variable ‘result’ [-Wunused-variable]
   double result;
          ^~~~~~

[michalhabera]

Yes, we are aware. I will fix this very soon. There will be a PR to dolfinx to add the flags also to dolfinx tests.

[michalhabera]

Should be solved now with #216