[Nut-upsdev] Cross-compiling for OpenWRT on Debian - neon libraries error

[Seb Belcher]

Thanks for the tip.  I was trying to point it to the compilation system’s
libraries but your response made me realise I needed to point it to the
target systems libraries and cross-compile them first.

On Sat, 18 Sep 2021 at 21:26, Charles Lepple <clepple at gmail.com> wrote:

> On Sep 16, 2021, at 6:30 AM, Seb Belcher via Nut-upsdev <
> nut-upsdev at alioth-lists.debian.net> wrote:
> >
> > Bit of a noob question I'm sure but would appreciate the help.  The nut
> package maintained for OpenWRT does not include the netxml drivers that I
> need for my UPS, so I'm embarking on something a little outside my comfort
> zone and trying to cross-compile from source.  The build system is Debian.
> >
> > I've got quite far, and was able to cross-compile nut with default
> options but adding the --with-neon is breaking it.  I've installed the neon
> dev libraries on the build system and they seem to be detected during the
> configure stage
> > ...
> > checking for libneon version via pkg-config (0.25.0 minimum required)...
> 0.30.2 found
> > checking for libneon cflags... -I/usr/include/neon
> > checking for libneon ldflags... -lneon
> > ...
> > but then it quits with an error.
> > configure: error: "neon libraries not found, required for neon based
> XML/HTTP driver"
> >
> > I've verified the neon header files are in /usr/include/neon beyond
> that, I'm at a loss.  Any help would be appreciated.  Thanks.
> >
> It's been a little while since I last used a cross-compiler, so maybe I am
> rusty on terminology. It sounds like you are building on a Debian system,
> but targeting OpenWRT - are they both the same architecture? (e.g. Debian
> on MIPS, and a WRT54G MIPS-based router)
>
> If not, I would expect that your path for libneon would be a little
> longer, with the target architecture/OS included in there somewhere. (The
> include files might work across similar architectures, but the libraries
> are definitely going to have to match the target architecture/OS.)
>
> For instance, you might need to install libneon into the Buildroot
> staging_dir if you are following these instructions:
>
> https://openwrt.org/docs/guide-developer/crosscompile
>
> then follow their recommendations on setting LDFLAGS (which should
> probably show up in NUT's ./configure output).
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