Comment 3 for bug 1285505

Hm, sadly bisect gives me:

ubuntu@c-trusty-0:~/qemu$ git bisect good
ba1183da9a10b94611cad88c44a5c6df005f9b55 is the first bad commit
commit ba1183da9a10b94611cad88c44a5c6df005f9b55
Author: Fam Zheng <email address hidden>
Date: Mon Feb 10 14:48:52 2014 +0800

    rules.mak: fix $(obj) to a real relative path

    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 <email address hidden>
    Signed-off-by: Paolo Bonzini <email address hidden>

:100644 100644 807054b3a1797c911c81c58ae04c15cc599551f6 52b1958b4b43e9e90c68a6339b818f7893ba2551 M Makefile
:100644 100644 ac1d0e1c285073e1dc881061a3395189074289d0 1914080134d2559c63e76fe0650c9b86e57d3cd8 M Makefile.objs
:100644 100644 af6ac7eaa19f922cf5d006ee7eebd8ef2dfde3d4 9a6e7dd1b85e75baed2580d51456e614a0ba096f M Makefile.target
:100755 100755 4648117957465e554bd0005dc51d7e1750b97526 66b1d30c99a83a8856ecfa72bceb55a17928c70c M configure
:100644 100644 391d6eb8e612e5f7361249fe68040f50eb1c7bcc a95fb76626d5e30b5ac1b4ef5528ba5383f3ccd0 M rules.mak