https://bugs.llvm.org/show_bug.cgi?id=52130

            Bug ID: 52130
           Summary: #pragma diagnostic push/pop docs out of date re GCC
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Documentation
          Assignee: unassignedclangb...@nondot.org
          Reporter: ojwbe...@gmail.com
                CC: llvm-bugs@lists.llvm.org, richard-l...@metafoo.co.uk

The clang docs at
https://clang.llvm.org/docs/UsersManual.html#controlling-diagnostics-via-pragmas
currently say:

> In addition to all of the functionality provided by GCC’s pragma, Clang also 
> allows you to push and pop the current warning state.

And:

> That means that it is possible to use push and pop around GCC compatible 
> diagnostics and Clang will push and pop them appropriately, while GCC will 
> ignore the pushes and pops as unknown pragmas.

This is out-of-date as GCC has implemented `#pragma GCC diagnostic push` and
`#pragma GCC diagnostic pop` since 4.6.0 (which was released over 10 years
ago):

https://gcc.gnu.org/onlinedocs/gcc-4.6.0/gcc/Diagnostic-Pragmas.html#Diagnostic-Pragmas

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