[Patch] Fortran: Improve -Wmissing-include-dirs warnings [PR55534]

While the previous patch fixed -Wno-missing-include-dirs and sorted out some inconsistencies with libcpp warnings, it had two issues: * Some superfluous warnings were printed, e.g. for gfortran nonexisting/file.f90 there was a warning about include path "nonexisting" not existing and

Re: [Patch] Fortran: Add gfc_simple_for_loop aux function

Hi Tobias, This patch adds a useful auxiliary function to generate a loop. Looks good to me (and there are probably quite a few places where this could be useful). Best regards Thomas

[Patch] Fortran: Fix assumed-size to assumed-rank passing [PR94070]

This patch requires the previously mentioned simple-loop-gen patch, which also still needs to be reviewed: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579576.html For the xfailed part of the new testcase, the updated array descriptor is needed, but I think leaving it as xfailed for