2.4 Options for debugging your program or GNU Fortran
GNU Fortran has various special options that are used for debugging
either your program or the GNU Fortran compiler.
- Output the internal parse tree before starting code generation. Only
really useful for debugging the GNU Fortran compiler itself.
- Specify a list of IEEE exceptions when a Floating Point Exception
(FPE) should be raised. On most systems, this will result in a SIGFPE
signal being sent and the program being interrupted, producing a core
file useful for debugging. list is a (possibly empty) comma-separated
list of the following IEEE exceptions: `invalid' (invalid floating
point operation, such as
SQRT(-1.0)), `zero' (division by
zero), `overflow' (overflow in a floating point operation),
`underflow' (underflow in a floating point operation),
`precision' (loss of precision during operation) and `denormal'
(operation produced a denormal value).
See Options for Debugging Your Program or GCC, for more information on