On Thu, Dec 26, 2019, at 04:49, David Miller wrote: > From: Rich Felker <dalias@xxxxxxxx> > Date: Wed, 25 Dec 2019 20:05:15 -0500 > > > On Wed, Dec 25, 2019 at 04:34:11PM -0800, David Miller wrote: > >> I find it really strange that this, therefore, only happens for musl > >> and we haven't had thousands of reports of this conflict with glibc > >> over the years. > > > > It's possible that there's software that's including just one of the > > headers conditional on __GLIBC__, and including both otherwise, or > > something like that. Arguably this should be considered unsupported > > usage; there are plenty of headers where that doesn't work and > > shouldn't be expected to. > > I don't buy that, this is waaaaaay too common a header to use. In case of net-tools, only <linux/ip.h> is included, and never <netinet/ip.h> directly. Chances are in musl the indirect include tree happens to be different and conflicting, while in glibc it is not. > > Please investigate. > Daniel