c/9049: No support for selective enabling/disabling of warnings

[gonz@ratloop.com]

>Number:         9049
>Category:       c
>Synopsis:       No support for selective enabling/disabling of warnings
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 23 16:26:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Pete Gonzalez
>Release:        3.2.1
>Organization:
>Environment:
Debian Linux
>Description:
GCC provides no facility for disabling/enabling a warning for a single function or block of code.  Every other C/C++ compiler has this feature.  Examples:

Visual C++:  #pragma warning
Borland C++: #pragma warn
Watcom C++:  #pragma warning

Here is some sample syntax in Visual C++:

  int a;
  #pragma warning( disable : 4705 )  // diable warning
  void func() {
    a;
  }
  #pragma warning( default : 4705 )  // restore original setting

GCC has no such feature, requiring warnings to be disabled globally for an entire file (or project).
>How-To-Repeat:
N/A
>Fix:
Implement the "warning" pragma.  Or, provide GCC attributes for disabling/enabling warnings.
>Release-Note:
>Audit-Trail:
>Unformatted: