gfortran debugging with gdb: w_powf.c: No such file or directory

Question

I have a Fortran program I am debuging. I have a list of varables and one of the expected variables is almost double its expected value. So I compiled the program, with debug f

Answer 1

The error means that the source file w_powf.c is not available on your system. It's not related to your program apparently. You can safely ignore that error.

Note that the lines you mention have the operator ** which I suppose is implemented in that file, so it's just telling you that there is no access to the source code of the implementation of that operator.

Answer 2

** is in Fortran exponential operator. Exponentiation is implemented in glibc w_powf.c. Gdb can't find this file in your sources. This is not an error, rather diagnostic.