[Bug c/104424] New: -fvolatile, not documented in gcc-4.3.3

[Bug c/104424] New: -fvolatile, not documented in gcc-4.3.3

[swaroop.tekale at se dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

            Bug ID: 104424
           Summary: -fvolatile, not documented in gcc-4.3.3
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: swaroop.tekale at se dot com
  Target Milestone: ---

"-fvolatile" flag is not listed in the below gcc-4.3.6:
https://gcc.gnu.org/onlinedocs/gcc-4.3.6/gcc/Option-Summary.html#Option-Summary

Can you please confirm if this is explicitly removed, as it should not be
configured ?

Or if it is a gcc document miss in above link?

We are still able to use the -fvolatile flag as part of compiler options, So
need confirmation if this is still a valid flag ?

This will help us to understand if we still have to keep "-fvolatile" flag in
our environment or consider removing it.

Compiler version: gnu 4.3.3

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Such a flag never existed, there is only -Wvolatile.

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[swaroop.tekale at se dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

--- Comment #2 from Swaroop Tekale <swaroop.tekale at se dot com> ---
It seems to be there on or before gcc-3.3.6:

https://gcc.gnu.org/onlinedocs/gcc-3.3.6/gcc/Option-Summary.html#Option-Summary

Code Generation Options
See Options for Code Generation Conventions.
          -fcall-saved-reg  -fcall-used-reg 
          -ffixed-reg  -fexceptions 
          -fnon-call-exceptions  -funwind-tables 
          -fasynchronous-unwind-tables 
          -finhibit-size-directive  -finstrument-functions 
          -fno-common  -fno-ident  -fno-gnu-linker 
          -fpcc-struct-return  -fpic  -fPIC 
          -freg-struct-return  -fshared-data  -fshort-enums 
          -fshort-double  -fshort-wchar  -fvolatile 
          -fvolatile-global  -fvolatile-static 
          -fverbose-asm  -fpack-struct  -fstack-check 
          -fstack-limit-register=reg  -fstack-limit-symbol=sym 
          -fargument-alias  -fargument-noalias 
          -fargument-noalias-global  -fleading-underscore 
          -ftls-model=model 
          -ftrapv  -fbounds-check

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not there because it was removed in GCC 3.4:
https://gcc.gnu.org/gcc-3.4/changes.html

You will get an error if you try to use it with 4.3.3

There is no bug report here, so I think it would have been more appropriate on
the gcc-help mailing list, https://gcc.gnu.org/lists.html

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

Jonathan Wakely <redi at gcc dot gnu.org> changed:

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

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[swaroop.tekale at se dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

Swaroop Tekale <swaroop.tekale at se dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |WORKSFORME
             Status|RESOLVED                    |VERIFIED

--- Comment #5 from Swaroop Tekale <swaroop.tekale at se dot com> ---
As mentioned in the description: We are able to use the -fvolatile flag. We are
not getting any errors. 
And hence need to understand if this is a a document miss or really an invalid
flag for gcc 4.3.3 ?

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WORKSFORME                  |INVALID

[Bug c/104424] -fvolatile, not documented in gcc-4.3.3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104424

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|VERIFIED                    |RESOLVED

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The flag does not exist (and cannot be used) in the official GCC releases.
Maybe you are using a modified GCC provided by a third party, so that the
switch is silently ignored and doesn't give an error. In that case, you should
ask whoever provided you with that build.

The documentation on gcc.gnu.org applies to official releases, and -fvolatile
gives an error for those:

$ /home/jwakely/gcc/4.1.2/bin/gcc -x c /dev/null -fvolatile
cc1: error: unrecognized command line option "-fvolatile"
$ /home/jwakely/gcc/4.3.6/bin/gcc -x c /dev/null -fvolatile
cc1: error: unrecognized command line option "-fvolatile"