Since 2008 the tcg/LICENSE file has not changed: it claims that everything under tcg/ is BSD-licensed.
This is not true and hasn't been true for years: in 2013 we accepted the tcg/aarch64 target code under a GPLv2-or-later license statement. We also have generic vector optimisation code under the LGPL2.1-or-later, and the TCI backend is GPLv2-or-later. Further, many of the files are not BSD licensed but MIT licensed. We don't really consider the tcg subdirectory to be a distinct part of QEMU anyway. This patchset adds explicit licensing/copyright comments to the three files which were missing them, removes the inaccurate tcg/LICENSE file, and updates the top-level LICENSE file to be more accurate about the current state of the licenses used in the code in tcg/. If we want a policy that tcg/ code has a restricted permitted set of licenses, then we really need to have this enforced by checkpatch -- history demonstrates that just writing it in tcg/LICENSE does not prevent code under other licenses getting in. In the v1 email thread nobody seemed to be very strongly arguing for this, though, and at this point we would need to make an active effort to track down contributors and get relicensing statements. If anybody wants to push that effort now would be a good time to volunteer :-) Note on the licensing for the tcg-target.opc.h files: * I've used the same license as the rest of the relevant backend, which is to say GPL2-or-later for tcg/aarch64 and MIT for tcg/i386 and tcg/ppc. * In all 3 cases, the only people who've made contributions to the files are Richard Henderson and (for aarch64) Alex Bennée Richard, Alex -- an acked-by for the relevant patches would be nice (or if you intended a different license for the contributions than I have assumed please say so!) v1->v2 changes: * note the presence of MIT licensed code as well * 3 new patches adding copyright/licensing to files that were missing it thanks -- PMM Peter Maydell (4): tcg/aarch64/tcg-target.opc.h: Add copyright/license tcg/i386/tcg-target.opc.h: Add copyright/license tcg/ppc/tcg-target.opc.h: Add copyright/license tcg/LICENSE: Remove out of date claim about TCG subdirectory licensing tcg/aarch64/tcg-target.opc.h | 15 ++++++++++++--- tcg/i386/tcg-target.opc.h | 28 +++++++++++++++++++++++++--- tcg/ppc/tcg-target.opc.h | 20 ++++++++++++++++++++ LICENSE | 5 +++-- tcg/LICENSE | 3 --- 5 files changed, 60 insertions(+), 11 deletions(-) delete mode 100644 tcg/LICENSE -- 2.20.1
