Tom Eccles afa52de9f6 [flang][Runtime] Add SIGNAL intrinisic (#79337) ...

The intrinsic is defined as a GNU extension here:
https://gcc.gnu.org/onlinedocs/gfortran/SIGNAL.html

And as an IBM extension here:
https://www.ibm.com/docs/en/xffbg/121.141?topic=procedures-signali-proc-extension

The IBM version provides a compatible subset of the functionality
offered by the GNU version. This patch supports most of the GNU
features, but not calling SIGNAL as a function. We don't currently
support intrinsics being both subroutines AND functions and this changed
seemed too large to be justified by a non-standard intrinsic.

I cannot point to open source code Fortran using this intrinsic. This is
needed for a proprietary code base.

2024-01-26 14:20:50 +00:00

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