[Buildroot] adding dhcpcd

[John Stile <john@stilen.com>]

Hello Gilles,
On Wed, 2013-03-06 at 20:51 -0800, Gilles Talis wrote:
> Hi John,
> 
> > That did help.  Thank you.
> > The build now fails because it can't find ifaddrs.h:
> > ipv6.c:34:21: error: ifaddrs.h: No such file or directory
> > net.c:56:21: error: ifaddrs.h: No such file or directory
> >
> > But I do see the file here:
> > ./output/toolchain/uClibc-0.9.32/include/ifaddrs.h
> >
> > Is there a good way to specify the path in my .mk file?
> Did you build your toolchain with Buildroot? In buildroot-2011.11,
> this feature is not enabled in uClibc-0.9.32 configuration.
> In order to enable it, you can follow these steps (if you built your
> toolchain using buildroot):
> 
> 1. in  toolchain/uClibc/uClibc-0.9.32.config, replace
> # UCLIBC_SUPPORT_AI_ADDRCONFIG is not set
> with
> UCLIBC_SUPPORT_AI_ADDRCONFIG=y
> 
> 2. run "make clean" then
> 3. run "make". Toolchain will be rebuilt with ifaddrs.h
> 
> This should get you going.
> Gilles.
That did get me quite a bit farther.

... now it fails to find a few more symbols:
bpf.c:32:21: error: net/bpf.h: No such file or directory
In file included from bpf.c:49:
bpf-filter.h:33: error: array type has incomplete element type
bpf-filter.h:36: error: 'BPF_LD' undeclared here (not in a function)
bpf-filter.h:36: error: 'BPF_H' undeclared here (not in a function)
bpf-filter.h:36: error: 'BPF_ABS' undeclared here (not in a function)
bpf-filter.h:37: error: 'BPF_JMP' undeclared here (not in a function)
bpf-filter.h:37: error: 'BPF_JEQ' undeclared here (not in a function)
bpf-filter.h:37: error: 'BPF_K' undeclared here (not in a function)
bpf-filter.h:46: error: 'BPF_RET' undeclared here (not in a function)
bpf-filter.h:78: error: array type has incomplete element type
bpf-filter.h:85: error: 'BPF_B' undeclared here (not in a function)
bpf-filter.h:89: error: 'BPF_JSET' undeclared here (not in a function)
bpf-filter.h:91: error: 'BPF_LDX' undeclared here (not in a function)
bpf-filter.h:91: error: 'BPF_MSH' undeclared here (not in a function)
bpf-filter.h:93: error: 'BPF_IND' undeclared here (not in a function)

I can see output/build/dhcpcd-5.6.7/bpf.c
has: #include "bpf-filter.h"

I can see the symbols are defined in several files.
./output/host/usr/arm-unknown-linux-uclibcgnueabi/sysroot/usr/include/linux/filter.h
./output/toolchain/linux/include/linux/filter.h
./output/toolchain/uClibc_dev/usr/include/linux/filter.h
./output/toolchain/linux-2.6.38.8/include/linux/filter.h

Are there more magical ideas to keep this compile going?
Possibly another uClibc option?