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doc: -Wdelete-non-virtual-dtor supersedes -Wnon-virtual-dtor

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The newer -Wdelete-non-virtual-dtor has no false positives and fewer
bugs. There is very little reason to use -Wnon-virtual-dtor instead.

gcc/ChangeLog:

	* doc/invoke.texi (C++ Dialect Options): Recommend using
	-Wdelete-non-virtual-dtor instead of -Wnon-virtual-dtor.
This commit is contained in:
Jonathan Wakely 2022-11-23 10:01:06 +00:00
parent d601708870
commit 51f28e3aaf
1 changed files with 3 additions and 0 deletions
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gcc/doc/invoke.texi
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@ -3986,6 +3986,9 @@ destructor itself or in an accessible polymorphic base class, in which
case it is possible but unsafe to delete an instance of a derived
class through a pointer to the class itself or base class. This
warning is automatically enabled if @option{-Weffc++} is specified.
The @option{-Wdelete-non-virtual-dtor} option (enabled by @option{-Wall})
should be preferred because it warns about the unsafe cases without false
positives.
@item -Wregister @r{(C++ and Objective-C++ only)}
@opindex Wregister