Re: [Qemu-devel] [PATCH v6 1/8] make.rule: fix $(obj) to a real relative path

["Daniel P. Berrange" <berrange@redhat.com>]

On Wed, Sep 11, 2013 at 09:34:01PM +0800, Fam Zheng wrote:
> Makefile.target includes rule.mak and unnested common-obj-y, then prefix
> them with '../', this will ignore object specific QEMU_CFLAGS in subdir
> Makefile.objs:
> 
>     $(obj)/curl.o: QEMU_CFLAGS += $(CURL_CFLAGS)
> 
> Because $(obj) here is './block', instead of '../block'. This doesn't
> hurt compiling because we basically build all .o from top Makefile,
> before entering Makefile.target, but it will affact arriving per-object
> libs support.
> 
> The starting point of $(obj) is passed in as argument of unnest-vars, as
> well as nested variables, so that different Makefiles can pass in a
> right value.
> 
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>  Makefile        | 16 +++++++++++++++-
>  Makefile.objs   | 16 +---------------
>  Makefile.target | 17 +++++++++++++----
>  configure       |  1 +
>  rules.mak       | 16 +++++++++++-----
>  5 files changed, 41 insertions(+), 25 deletions(-)

This change appears to break the build of libcacard.so when I tried
the following sequence with current git master

 $ git clean -f -x -d
 $ ./configure --prefix=$HOME/usr/qemu-git --target-list=x86_64-softmmu
 $ make -j 20
   ....
  lt LINK vscclient
  ./.libs/libcacard.so: undefined reference to `monitor_fdset_get_fd'
  ./.libs/libcacard.so: undefined reference to `monitor_fdset_dup_fd_add'
  ./.libs/libcacard.so: undefined reference to `monitor_fdset_dup_fd_remove'
  ./.libs/libcacard.so: undefined reference to `monitor_fdset_dup_fd_find'
  collect2: error: ld returned 1 exit status

I'm also seeing make report circular deps

  make: Circular stubs/ <- stubs/ dependency dropped.
  make: Circular trace/ <- stubs/ dependency dropped.
  make: Circular trace/ <- trace/ dependency dropped.


Regards,
Daniel
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