Re: Debug Fortran 90 code in Emacs with arguments.

[Hongyi Zhao]

On Tue, Apr 5, 2022 at 7:18 PM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Hongyi Zhao <hongyi.zhao@gmail.com>
> > Date: Tue, 5 Apr 2022 10:27:41 +0800
> >
> > The above code snippet must be run and debug with some arguments, say,
> > as follows:
> >
> > -o 42 -a hello b
> >
> > So, I want to know how to debug Fortran 90 code in Emacs with arguments.
>
> Use GDB via the "M-x gdb" Emacs front-end.

I tried with the following steps, but still failed to figure it out:

1. $ emacs the_fortran_example.f90
2. In Emacs, issue the command `M-x gdb RET`.

At this point, I see the following information:

```
Current directory is ~/temp/FortranProject/bilbao_read/
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
gfotran: No such file or directory.
(gdb) exec-file get_command_argument.f90
"/home/werner/temp/FortranProject/bilbao_read/get_command_argument.f90":
not in executable format: file format not recognized
exit
Undefined command: "exit".  Try "help".
(gdb) q

Debugger finished
Current directory is ~/temp/FortranProject/bilbao_read/
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
gfotran: No such file or directory.
(gdb) q

Debugger finished
Current directory is ~/temp/FortranProject/bilbao_read/
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
gfotran: No such file or directory.
(gdb)
```

How to do next?

Regards
-- 
Assoc. Prof. Hongsheng Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province