dhcpcd-discuss

On Fri, 2019-01-11 at 13:48 +0000, Roy Marples wrote:
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> 
> On 11/01/2019 13:27, Joakim Tjernlund wrote:
> > On Fri, 2019-01-11 at 12:41 +0000, Roy Marples wrote:
> > > On 11/01/2019 11:32, Joakim Tjernlund wrote:
> > > > > This is passed to configure: --includedir=/usr/include
> > > > > 
> > > > > That is exactly what the compiler then complains about.
> > > > > So fix the build environment .... how I have no idea, but good luck!
> > > > > 
> > > > >    > | ./configure: WARNING: unknown option --exec_prefix
> > > > >    > | ./configure: WARNING: unknown option --sharedstatedir
> > > > >    > | ./configure: WARNING: unknown option --oldincludedir
> > > > >    > | ./configure: WARNING: unknown option --with-libtool-sysroot
> > > > 
> > > > I think you have old autotool/libtool which was used to generate this configure.
> > > > --with-libtool-sysroot is a modern libtool feature, needed for cross building.
> > > 
> > > This is hand rolled configure - it's not GNU configure, autotool or libtool.
> > > The way dhcpcd is configured and built works fine in Gentoo Portage
> > > which is a cross build environment - all you really need to do is
> > > specify your cross compiler with the CC env var or --CC= configure option.
> > 
> > I am on Gentoo as well :) It works well because on Gentoo uses gcc's builtin sysroot.
> > However, one can pass EXTRA_ECONF=--sysroot=/x/y/x if you want a different sysroot.
> 
> Or we can stop adding so many knobs and just use CFLAGS?
> Example Makefile directive - no idea how to do this in bitbake.
> CFLAGS+=        --sysroot=/x/y/x

That won't work for true autotools systems, other parts needs it too(like libtool)
In you case it could work, if you use gcc to link. Otherwise you need to
pass it to LDFLAGS as well.

> 
> > Maybe the faulty /usr/include below is a result of missing sysroot support ?
> 
> ./configure: WARNING: unknown option --with-libtool-sysroot
> dhcpcd doesn't even use libtool, so there won't be any support for that.

Ahh, that reminds me. Yocto/OE has their own libtool patches since upstrem is more or less dead.
They opted to name it with-libtool-sysroot, not to clash with --sysroot
Not sure if they use --sysroot too.

> 
> > > > >    > | ./configure: WARNING: unknown option --with-udev
> > > > > 
> > > > > You can't turn udev on explicitly, you can only turn it off.
> > > > 
> > > > "On" should be an option too and configure should fail if it doesn't find udev
> > > 
> > > As you wish:
> > > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Froy.marples.name%2Fgit%2Fdhcpcd.git%2Fcommit%2F%3Fid%3D2baa28fe39f3c1e780f8b1585c0ca518241f9677&data=02%7C01%7CJoakim.Tjernlund%40infinera.com%7C4c568952cc204f27f1ca08d677cb6dce%7C285643de5f5b4b03a1530ae2dc8aaf77%7C1%7C0%7C636828112939598084&sdata=HRbVCI%2BYznzbhRTjv7oi5nrCBuLMw%2Fvc%2BNe%2BgmfzBbk%3D&reserved=0
> > 
> > :) You are way too fast for me
> 
> I aim to please :)

Good to know, I will remember that next time I need your help :)