Re: [dpdk-dev] [PATCH v2] build: skip detecting libpcap via pcap-config

[Bruce Richardson <bruce.richardson@intel.com>]

On Mon, Oct 12, 2020 at 02:02:19PM +0200, David Marchand wrote:
> On Fri, Oct 9, 2020 at 4:19 PM Bruce Richardson
> <bruce.richardson@intel.com> wrote:
> >
> > When compiling for a slightly different architecture, e.g. 32-bit on 64-bit
> > systems using CFLAGS rather than a cross-file, the pcap-config utility can
> > often return parameters that are unusable for the build in question, i.e.
> > providing the native 64-bit library paths rather than checking for 32-bit
> > equivalent.
> >
> > Since many distros now include a version of libpcap with a
> > pkg-config file, and for those that don't find-library should work ok as a
> > fallback, we can explicitly just use pkg-config in the dependency search,
> > causing meson to skip trying to use pcap-config.
> >
> > Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> 
> I also hit (this?) issue on a fc32 with both 32-bit and 64-bit pcap installed.
> Can you confirm?
> 

It looks to be the same general issue. Does adding this patch fix things?
When compiling 32-bit on 64-bit you generally need to be sure to set
PKG_CONFIG_LIBDIR in your environment to point to the appropriate path. It
might also serve to fix things in this instance, if not set.

> If so, we might want to backport this as I get the same problem with v19.11.4.
> 

Good idea, I don't think it will break anything.

/Bruce