[flang-commits] [clang] [flang] [llvm] [flang][flang-rt] Add -ffpe-trap= to set the initial FP exception halting mode (PR #208828)

[Tarun Prabhu via flang-commits]

================
@@ -34,6 +34,17 @@ page](https://llvm.org/releases/).
 ## Non-comprehensive list of changes in this release
 
 ## New Compiler Flags
+- The `-ffpe-trap=` flag is now supported. It sets the initial floating-point
+  exception halting mode for the main program to a comma-separated list of
+  `invalid`, `zero`, `overflow`, `underflow`, and `inexact` (plus the
+  non-standard, gfortran-compatible extension `denormal`). Use `none` or an
+  empty list to disable halting. In the absence of this option, the program runs
+  with traps disabled (equivalent to passing `none`). If `-ffpe-trap=` occurs
+  more than once, only the last one takes effect. Processor dependent (Fortran
+  2023, 17.6) initial halting control is implemented for x86 and glibc-based
+  (Linux) targets only; on other targets a warning is emitted and the option is
----------------
tarunprabhu wrote:

If this only works with glibc on Linux, then Linux should not be parenthetical.

```suggestion
  Linux targets only; on other targets a warning is emitted and the option is
```

https://github.com/llvm/llvm-project/pull/208828