Divide by zero at compilation time

[Jerry DeLisle]

Alberto Luaces wrote:
> Hello,
> 
> I am trying to compile a program made of several files, most of them modules. 
> All the files were succesfully built on the Windows Compaq compiler before. I 
> am in the process of getting the code to compile in Linux gfortran, fixing 
> some non-standard features that the original code had. So far, so good.
> 
> However, the compilation of a few files is giving a weird error. It is using 
> two modules previously built:
> 
> gfortran -c jacob_log_pos.f90
>  In file jacob_log_pos.f90:3
> 
>  USE CONSTANTES
>               1
> Error: Division by zero at (1)
> make: *** [all] Error 1
> 
> That module, 'CONSTANTES', is being succesfully used on other files. If I 
> comment that line, the same error is issued on the next reference to a 
> module.
> 
> I am attaching the only 3 files that reflect the problem, 2 modules and the 
> file that is giving the error. I am also sending a Makefile to facilitate the 
> compilation. If you want to give it a try, you have only to 'make':
> 
>> make
> gfortran -c constantes.F90
> gfortran -c jacob_log_MOD.f90
> gfortran -c jacob_log_pos.f90
>  In file jacob_log_pos.f90:3
> 
>  USE CONSTANTES
>               1
> Error: Division by zero at (1)
> make: *** [all] Error 1
> 
> I am using gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4), 64bit (amd64). I have 
> also tried with gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21), 
> this time 32bit and also got the same error.
> 
> What do you think about this?
> 
> Thank you very much,
> 
> Alberto

I have confirmed this problem on gfortran 4.1.1 and 4.2. It does not occur on 
4.3, so it looks like it has been fixed.

Jerry