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From: "antiquarktv at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/97829] New: pragma ignore "-Wint-in-bool-context" is ignored
 for _Bool _Complex interaction
Date: Sat, 14 Nov 2020 17:52:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97829

            Bug ID: 97829
           Summary: pragma ignore "-Wint-in-bool-context" is ignored for
                    _Bool _Complex interaction
           Product: gcc
           Version: 10.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antiquarktv at gmail dot com
  Target Milestone: ---

#include <stdio.h>
#include <stdlib.h>

// gcc -std=3Dc11 -Wall -Wextra -pedantic main.c

#pragma GCC diagnostic ignored "-Wint-in-bool-context"=20
#pragma GCC diagnostic ignored "-Wunused-variable"=20

int main()
{
        double _Complex x =3D 1;
        _Bool b =3D 1;
        b *=3D x;      // prints int-in-bool-context warning.
        _Bool c =3D 2; // unused var warning not printed.
}

/*=20

The code above prints the following when compiled:

gcc -std=3Dc11 -Wall -Wextra -pedantic main.c
main.c: In function =E2=80=98main=E2=80=99:
cc1: warning: =E2=80=98*=E2=80=99 in boolean context, suggest =E2=80=98&&=
=E2=80=99 instead
[-Wint-in-bool-context]
cc1: warning: =E2=80=98*=E2=80=99 in boolean context, suggest =E2=80=98&&=
=E2=80=99 instead
[-Wint-in-bool-context]

The Wint-in-bool-context warning is printed by cc1 as a result of the _Bool=
 *=3D
_Complex operation

If this code is compiled with -Wno-int-in-bool-context on the command line,
there is no warning:

gcc -std=3Dc11 -Wall -Wextra -pedantic main.c -Wno-int-in-bool-context
(produces no output).=20

*/=