On 02/20/2014 08:12 AM, David A. Wheeler wrote: > Thomas Jahns: >> Also this is going to cause all sorts problems for compilers that use -W for >> something else entirely, for example on PowerPC xlc has >> -W<program>,<options_list> >> so simply adding some arbitrary -Wsomecharactersequence might easily cause >> catastrophic results later on. > > I think that's the whole point of the macro; instead of just adding arbitrary flags, > it tests to make sure there are *not* catastrophic effects, but instead, that > the flag is recognized. Or at least has no observable negative effects even if it is a no-op to a particular compiler by including the flag. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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