[Buildroot] pppd breaks build without libutils

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2016-09-28 10:59 +0200, Thomas Petazzoni spake thusly:
> On Tue, 27 Sep 2016 23:43:25 +0200, Yann E. MORIN wrote:
> 
> > Which suddenly rings a bell here: the latest uClibc-ng version, 1.0.18,
> > now is one-lib, i.e. everything merged into libc.so like musl is, so
> > we could get external toolchains which will lack libutil.so because
> > there is no longer such a library now.
> > 
> > If uClibc-ng does like musl does, there will be a lot of empty static
> > versions of the libraries, libutil.a, libcrypt.a and so on, but there
> > will no longer be shared variants.
> > 
> > We'll have to account for that in our external toolchain handling.
> 
> I'm not sure what needs to be handled. We already support musl that
> does this, and it works fine. It should be perfectly transparent to the
> external toolchain handling (except the copying of the shared libraries
> to the target, of course).

That's exactly what I meant: currently, we copy anexplicit set of shared
libraries from external uClibc-based toolchains:

   66 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
   67 TOOLCHAIN_EXTERNAL_LIBS += libatomic.so.* libc.so.* libcrypt.so.*
        libdl.so.* libgcc_s.so.* libm.so.*       libnsl.so.* libresolv.so.*
        librt.so.* libutil.so.*
   68 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC)$(BR2_ARM_EABIHF),yy)
   69 TOOLCHAIN_EXTERNAL_LIBS += ld-linux-armhf.so.*
   70 else
   71 TOOLCHAIN_EXTERNAL_LIBS += ld*.so.*
   72 endif
   73 ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
   74 TOOLCHAIN_EXTERNAL_LIBS += libpthread.so.*
   75 ifneq ($(BR2_PACKAGE_GDB)$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY),)
   76 TOOLCHAIN_EXTERNAL_LIBS += libthread_db.so.*
   77 endif # gdbserver
   78 endif # ! no threads
   79 endif

Now, old uClibc-based toolchains will have those libs, while newer ones
will only have libc.so.* .

This is that which we need to account for.

Regards,
Yann E. MORIN.

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