Re: [Qemu-devel] [PATCH v11 0/8] Shared Library Module Support

[Stefan Hajnoczi <stefanha@gmail.com>]

On Thu, Sep 26, 2013 at 3:26 PM, Fam Zheng <famz@redhat.com> wrote:
> On Tue, 09/17 16:54, Fam Zheng wrote:
>> This series implements feature of shared object building as described in:
>>
>> http://wiki.qemu.org/Features/Modules
>>
>> The main idea behind modules is to isolate dependencies on third party
>> libraries from qemu executables, such as libglusterfs or librbd, so that the
>> end users can install core qemu package with fewer dependencies.  And only for
>> those who want to use particular modules, need they install qemu-foo
>> sub-package, which in turn requires libbar and libbiz packages.
>>
>> It's implemented in three steps:
>>
>> 1. The first patches fix current build system to correctly handle nested
>>    variables and object specific options:
>>
>>     [01/08] ui/Makefile.objs: delete unnecessary cocoa.o dependency
>>     [02/08] make.rule: fix $(obj) to a real relative path
>>     [03/08] rule.mak: allow per object cflags and libs
>>
>> 2. The Makefile changes adds necessary options and rules to build DSO objects:
>>
>>     [04/08] build-sys: introduce common-obj-m and block-obj-m for DSO
>>
>> 3. The next patch adds code to load modules from installed directory:
>>
>>     [05/08] module: implement module loading
>>
>> A few more changes are following to complete it:
>>
>>     [06/08] Makefile: install modules with "make install"
>>     [07/08] .gitignore: ignore module related files (dll, so, mo)
>>
>> In the end of series, the block drivers are converted:
>>
>>     [08/08] block: convert block drivers linked with libs to modules
>>
>
> Ping?
>
>> v11:
>>     [04] Link DSO with  -Wl,--enable-new-dtags -Wl,-rpath,'$$ORIGIN' (Richard)
>
> I don't fully understand the portability issue with this flag yet, is this OK
> to keep or should be dropped? Any opinions?

Ping^2

This series will be useful for enabling block drivers with library
dependencies, so I hope we can merge it soon.  Today, package
maintainers must make a choice about the "right" set of features to
include in their QEMU build.  With modules they can simply build
everything and ship individual packages.

Stefan