Compilation fails on GCC 14

[tikk3r]

I may be out of officially supported territory with this, but thought I'd just note it. Updating my containers I ran into the following crash when trying to build the current master (5cec4db) with GCC 14 on Fedora 40:

      -- Configuring done (0.8s)
      -- Generating done (0.0s)
      -- Build files have been written to: /opt/lofar/DDFacet/DDFacet/cbuild
      *** Building project with Ninja...
      [1/11] Building C object Gridder/old_c_gridder/CMakeFiles/_pyGridderSmearPolsClassic3x.dir/GridderSmearPols.c.o
      FAILED: Gridder/old_c_gridder/CMakeFiles/_pyGridderSmearPolsClassic3x.dir/GridderSmearPols.c.o
      /usr/bin/gcc -D_pyGridderSmearPolsClassic3x_EXPORTS -I/usr/include/python3.12 -I/tmp/pip-build-env-9_iwrnj4/overlay/lib64/python3.12/site-packages/numpy/_core/include -I/tmp/pip-build-env-9_iwrnj4/overlay/lib64/python3.12/site-packages/numpy/_core/include/numpy -I/tmp/pip-build-env-9_iwrnj4/overlay/lib/python3.12/site-packages/pybind11/include -w -march=sandybridge -mtune=sandybridge -mno-avx512f -O3 -DNDEBUG -ggdb3 -fopenmp -fmax-errors=1 -Wconversion -W -Wall -std=c99    -ffast-math -fPIC -MD -MT Gridder/old_c_gridder/CMakeFiles/_pyGridderSmearPolsClassic3x.dir/GridderSmearPols.c.o -MF Gridder/old_c_gridder/CMakeFiles/_pyGridderSmearPolsClassic3x.dir/GridderSmearPols.c.o.d -o Gridder/old_c_gridder/CMakeFiles/_pyGridderSmearPolsClassic3x.dir/GridderSmearPols.c.o -c /opt/lofar/DDFacet/DDFacet/Gridder/old_c_gridder/GridderSmearPols.c
      In file included from /opt/lofar/DDFacet/DDFacet/Gridder/old_c_gridder/GridderSmearPols.c:33:
      /opt/lofar/DDFacet/DDFacet/Gridder/old_c_gridder/JonesServer.c: In function ‘initJonesServer’:
      /opt/lofar/DDFacet/DDFacet/Gridder/old_c_gridder/JonesServer.c:276:33: error: assignment to ‘int *’ from incompatible pointer type ‘long int *’ [-Wincompatible-pointer-types]
        276 |     ptrTimeMappingJonesMatrices = p_int32(npTimeMappingJonesMatrices);
            |                                 ^
      compilation terminated due to -fmax-errors=1.
      [2/11] Building C object Gridder/old_c_gridder/CMakeFiles/_pyGridder3x.dir/Gridder.c.o
      [3/11] Building CXX object Gridder/CMakeFiles/_pyArrays3x.dir/Arrays.cc.o
      [4/11] Building CXX object Gridder/CMakeFiles/_pyGridderSmearPols3x.dir/Semaphores.cc.o
      [5/11] Building CXX object Gridder/CMakeFiles/_pyGridderSmearPols3x.dir/DecorrelationHelper.cc.o
      [6/11] Building CXX object Gridder/CMakeFiles/_pyGridderSmearPols3x.dir/JonesServer.cc.o
      [7/11] Building CXX object Gridder/CMakeFiles/_pyGridderSmearPols3x.dir/GridderSmearPols.cc.o
      ninja: build stopped: subcommand failed.
      
      *** CMake build failed
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for DDFacet
Failed to build DDFacet

I can temporarily work around it by adding -Wno-error=incompatible-pointer-types to the CFLAGS/CXXFLAGS, so at least build-wise it doesn't seem like a major show stopper at the moment.