[Bug c/26494] New: -pedantic-errors can be overridden by -W*

[Bug c/26494] New: -pedantic-errors can be overridden by -W*

[fn_x at hotmail dot com]

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This simple incorrect program:

int main() { puts("Hello"); }

when compiled with gcc -std=c99 -pedantic-errors is rejected with

test.c: In function ‘main’:
test.c:1: error: implicit declaration of function ‘puts’

However, add -Wall to the options, and it becomes:

test.c: In function ‘main’:
test.c:1: warning: implicit declaration of function ‘puts’

and the program compiles and runs without errors. I think gcc should not
compile it. Also, reordering the options doesn't change anything.

Given how old this is (I can see it with gcc 3.3.6, 3.4.5, 4.0.2 and
4.1(20060223)), I'm a bit surprised if it hasn't come up before, but I searched
bugzilla and didn't find anything. Sorry for anything I missed.


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           Summary: -pedantic-errors can be overridden by -W*
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fn_x at hotmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-02-28 12:59 -------
Confirmed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |diagnostic
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-28 12:59:24
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[manu at gcc dot gnu dot org]

------- Comment #2 from manu at gcc dot gnu dot org  2007-01-22 23:47 -------
Does it happen with any other option apart from
-Wimplicit-function-declaration?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[truedfx at gentoo dot org]

------- Comment #3 from truedfx at gentoo dot org  2007-01-23 00:05 -------
-Wendif-labels and -Wimplicit-int don't turn errors into warnings, so probably,
yes. I did notice something else of interest while testing, though:

int main(char a) {}

gcc bug.c -ansi -pedantic
compiles this without any error or warning.

gcc bug.c -ansi -pedantic -Wmain
reports
bug.c:1: warning: first argument of ‘main’ should be
‘int’
bug.c:1: warning: ‘main’ takes only zero or two arguments
and compiles this.

gcc bug.c -ansi -pedantic-errors
compiles this without any error or warning.

gcc bug.c -ansi -pedantic-errors -Wmain
reports
bug.c:1: error: first argument of ‘main’ should be
‘int’
bug.c:1: error: ‘main’ takes only zero or two arguments
and does not compile this.

Is that close enough to be covered by this bug report, should I report that as
a new bug, or should I not report that at all?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[truedfx at gentoo dot org]

------- Comment #4 from truedfx at gentoo dot org  2007-01-23 00:08 -------
(In reply to comment #3)
> -Wendif-labels and -Wimplicit-int don't turn errors into warnings, so probably,
> yes.

So probably, no, it does not happen with any other option. Sorry, I read your
question wrong.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[manu at gcc dot gnu dot org]

------- Comment #5 from manu at gcc dot gnu dot org  2007-01-23 00:10 -------
Open a new bug report, please. I am going to submit a patch to fix this one and
reviewers don't like patches that do many things and the same time. 

Add me to the CC list of the new report and I will look at it as soon as I can.

Thanks.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[truedfx at gentoo dot org]

------- Comment #6 from truedfx at gentoo dot org  2007-01-23 00:23 -------
Thank you, and done.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[patchapp at dberlin dot org]

------- Comment #7 from patchapp at dberlin dot org  2007-01-24 19:10 -------
Subject: Bug number PR 26494

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2007-01/msg02023.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[patchapp at dberlin dot org]

------- Comment #8 from patchapp at dberlin dot org  2007-01-25 09:55 -------
Subject: Bug number PR 26494

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2007-01/msg02068.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[manu at gcc dot gnu dot org]

------- Comment #9 from manu at gcc dot gnu dot org  2007-02-15 22:31 -------
Subject: Bug 26494

Author: manu
Date: Thu Feb 15 22:31:17 2007
New Revision: 122017

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122017
Log:
2007-02-15  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

        PR c/26494
        * doc/invoke.texi (Warning Options): Remove
        -Werror-implicit-function-declaration.
        (Wimplicit-function-declaration): Update description.
        * opts.c (common_handle_option): Move handling of -Werror=* to...
        (enable_warning_as_error): ...here.
        * opts.h (enable_warning_as_error): Declare.
        * c-decl.c (implicit_decl_warning): Unless
        -Wno-implicit-function-declaration is given, emit a pedwarn if
        -std=c99 or emit a warning if -Wimplicit-function-declaration.
        * c.opt (Wimplicit-function-declaration): Replace
        mesg_implicit_function_declaration with
        warn_implicit_function_declaration.
        * c-opts.c (c_common_handle_option):
        -Werror-implicit-function-declaration is exactly equal as
        -Werror=implicit-function-declaration.
        (set_Wimplicit): Replace mesg_implicit_function_declaration with
        warn_implicit_function_declaration.
        (c_common_post_options): -Wimplict-function-declaration is enabled
        by default by -std=c99, otherwise is disabled by default.
        * c-objc-common.c (c_objc_common_init): Remove flawed logic.
testsuite/
        * gcc.dg/Wimplicit-function-declaration-c89.c: New.
        * gcc.dg/Wimplicit-function-declaration-c89-default.c: New.
        * gcc.dg/Wimplicit-function-declaration-c89-pedantic.c: New.
        * gcc.dg/Wimplicit-function-declaration-c99.c: New.
        * gcc.dg/Wimplicit-function-declaration-c99-pedantic.c: New.
        * gcc.dg/Werror-implicit-function-declaration.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/Werror-implicit-function-declaration.c
    trunk/gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c89-default.c
    trunk/gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c89-pedantic.c
    trunk/gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c89.c
    trunk/gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c99-pedantic.c
    trunk/gcc/testsuite/gcc.dg/Wimplicit-function-declaration-c99.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-decl.c
    trunk/gcc/c-objc-common.c
    trunk/gcc/c-opts.c
    trunk/gcc/c.opt
    trunk/gcc/doc/invoke.texi
    trunk/gcc/opts.c
    trunk/gcc/opts.h
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494

[Bug c/26494] -pedantic-errors can be overridden by -W*

[manu at gcc dot gnu dot org]

------- Comment #10 from manu at gcc dot gnu dot org  2007-02-15 22:33 -------
Fixed in GCC 4.3


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manu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26494