[Qemu-devel] QEMU license problem (was [PATCH v3] Drop --whole-archive and static libraries)

[Stefan Weil <weil@mail.berlios.de>]

Blue Swirl schrieb:
> Thanks, applied.
>
>
> On Wed, Jan 6, 2010 at 7:24 PM, Andreas Färber
> <andreas.faerber@web.de> wrote:
>> From: Andreas Färber <afaerber@opensolaris.org>
>>
>> Juan has contributed a cool Makefile infrastructure that enables us
>> to drop
>> static libraries completely:
>>
>> Move shared obj-y definitions to Makefile.objs, prefixed
>> {common-,hw-,user-},
>> and link those object files directly into the executables.
>>
>> Replace HWLIB by HWDIR, specifying only the directory.
>>
>> Drop --whole-archive and ARLIBS in Makefiles and configure.
>>
>> Drop GENERATED_HEADERS dependency in rules.mak, since this rebuilds all
>> common objects after generating a target-specific header; add dependency
>> rules to Makefile and Makefile.target instead.
>>
>> v2:
>> - Don't try to include /config.mak for user emulators
>> - Changes to user object paths ("Quickfix for libuser.a drop") were
>> obsoleted
>>  by "user_only: compile everything with -fpie" (Kirill A. Shutemov)
>>
>> v3:
>> - Fix dependency modelling for tools
>> - Remove comment on GENERATED_HEADERS obsoleted by this patch
>>
>> Signed-off-by: Andreas Färber <afaerber@opensolaris.org>
>> Cc: Blue Swirl <blauwirbel@gmail.com>
>> Cc: Palle Lyckegaard <palle@lyckegaard.dk>
>> Cc: Ben Taylor <bentaylor.solx86@gmail.com>
>> Cc: Juan Quintela <quintela@trasno.org>
>> Cc: Kirill A. Shutemov <kirill@shutemov.name>
>> Cc: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  Makefile        |  138 +++++-------------------------------------------
>>  Makefile.hw     |   33 +-----------
>>  Makefile.objs   |  155
>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>  Makefile.target |   33 +++++++++---
>>  Makefile.user   |    9 +---
>>  configure       |   34 +------------
>>  rules.mak       |    4 +-
>>  7 files changed, 202 insertions(+), 204 deletions(-)
>>  create mode 100644 Makefile.objs
>>

Removing libqemu.a was technically ok, but throws a license problem:

"In particular, the QEMU virtual CPU core library (libqemu.a) is
released under the GNU Lesser General Public License."

Without libqemu.a, this part of QEMU's license no longer works.

I think the best solution would be to add a rule for libqemu.a
which allows users to build this static library (make libqemu.a).

libqemu.a is also still needed for tests/qruncom.

Regards,
Stefan Weil