[Bug c/100360] New: scalar operation fails the compilation

[Bug c/100360] New: scalar operation fails the compilation

[aliaga at uji dot es]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

            Bug ID: 100360
           Summary: scalar operation fails the compilation
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: aliaga at uji dot es
  Target Milestone: ---

Created attachment 50720
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50720&action=edit
Simple C file

Hi,

Really short code generates a internal error.

This is the code,
======================
 #include <stdio.h>
 #include <stdlib.h>


  void main(){
      double q = 1.0 / 16.0;

      printf ("%f\n", q);

  }
======================

The attachment contains the execution of the next command:
  gcc -v -save-temps error.c -o error.x 2> bug.txt

Best regards,

  José I. Aliaga

[Bug c/100360] scalar operation fails the compilation

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Target|                            |x86_64-linux-gnu
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2021-04-30

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is most likely due to this:
warning: GMP header version 6.2.0 differs from library version 6.2.1.

Can you make sure you have the correct version of GMP installed and such.

[Bug c/100360] scalar operation fails the compilation

[aliaga at uji dot es]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

--- Comment #2 from aliaga at uji dot es ---
(In reply to Andrew Pinski from comment #1)
> This is most likely due to this:
> warning: GMP header version 6.2.0 differs from library version 6.2.1.
> 
> Can you make sure you have the correct version of GMP installed and such.

Hi,

Thank you very much for your quick answer!!

I downloaded and installed the version 6.2.1 of GMP library in a local
directory, but the code attached in the bug doesn't use the GMP library.
Therefore, why does this error happen? 

In any case, I have recompiled the codes, and now the error doesn't occur. I
don't understand why. 

It is true that the first error occurred in a larger code where GMP 6.2.1 was
used. From this, I reduced the code trying to isolate the problem, removing the
use of GMP and generating a really short code. The only reasoning to justify
the solution could be that I have reconnected to the machine, but it is rare.

Given that the error no longer occurs, I want to thank you again your help.

Best regards,

  José I. Aliaga

[Bug c/100360] scalar operation fails the compilation

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's more likely that mpfr and/or GMP were configured with a wrong CPU and thus
run into the illegal instruction.  In the end this is unlikely a GCC problem.

Please verify with a debugger.

[Bug c/100360] scalar operation fails the compilation

[aliaga at uji dot es]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

--- Comment #4 from aliaga at uji dot es ---
Hi,

I have two different compiled versions of GMP. Initially, it is possible that I
tried to use the wrong version, but the simplest code doesn't use GMP,
therefore it doesn't matter the version which I chose.

Unfortunately, the error no longer occurs, and I can't to use the debugger.

In any case, thank you for your efforts.

Best regards,

  José I. Aliaga

[Bug c/100360] scalar operation fails the compilation

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100360

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|WAITING                     |RESOLVED

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Works when using the same GMP as being compiled with so closing as invalid.