https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105278
--- Comment #4 from David Binderman <dcb314 at hotmail dot com> --- (In reply to Eric Gallager from comment #3) > (In reply to David Binderman from comment #2) > > (In reply to Eric Gallager from comment #1) > > > -Wfloat-equal gets you a warning, as does -Wdouble-promotion: > > > > Thanks for that. This looks like another case where an obscure flag > > really ought to be in -Wall or at least -Wextra. > > > > I'll be adding it into my local compiler. > > Which one of them specifically do you want as part of -Wall or -Wextra? > Because the latter is listed explicitly in some documentation somewhere as > an example of a flag that would be bad to include in -Wall or -Wextra. Sorry, I should have been more clear -Wfloat-equal. I haven't looked into the pros and cons of -Wdouble-promotion. If you've got some spare time to pin down "some documentation somewhere", then that would be appreciated.