[Mesa-dev] [PATCH] dri3: allow building against older xcb (v3)

[Dylan Baker]

Quoting Rob Clark (2018-03-13 14:08:46)
> On Tue, Mar 13, 2018 at 4:48 PM, Dylan Baker <dylan at pnwbakers.com> wrote:
> > Quoting Dave Airlie (2018-03-13 13:06:00)
> >> From: Dave Airlie <airlied at redhat.com>
> >>
> >> I'm not sure everyone wants to be updating their dri3 in a forced
> >> march setting, this allows a nicer approach, esp when you want
> >> to build on distro that aren't brand new.
> >>
> >> I'm sure there are plenty of ways this patch could be cleaner,
> >> and I've also not built it against an updated dri3.
> >>
> >> For meson I've just left it alone, since if you are using meson
> >> you probably don't mind xcb updates, and if you are using meson
> >> you can fix this better than me.
> >>
> >> v3: just don't put a version in for dri3/present without
> >> modifiers, should allow building with 1.11 as well
> >>
> >> (feel free to supply meson followups)
> >>
> >> Signed-off-by: Dave Airlie <airlied at redhat.com>
> >> ---
> >>  configure.ac                             | 12 +++++++++---
> >>  meson.build                              |  2 +-
> >>  src/egl/drivers/dri2/platform_x11_dri3.c |  4 ++++
> >>  src/loader/loader_dri3_helper.c          | 22 ++++++++++++++++------
> >>  src/loader/loader_dri3_helper.h          |  3 ++-
> >>  src/vulkan/wsi/wsi_common_x11.c          | 12 ++++++++++--
> >>  6 files changed, 42 insertions(+), 13 deletions(-)
> >>
> >> diff --git a/configure.ac b/configure.ac
> >> index 1553ce99da..dcf3f924ee 100644
> >> --- a/configure.ac
> >> +++ b/configure.ac
> >> @@ -92,9 +92,9 @@ WAYLAND_REQUIRED=1.11
> >>  WAYLAND_PROTOCOLS_REQUIRED=1.8
> >>  XCB_REQUIRED=1.9.3
> >>  XCBDRI2_REQUIRED=1.8
> >> -XCBDRI3_REQUIRED=1.13
> >> +XCBDRI3_MODIFIERS_REQUIRED=1.13
> >>  XCBGLX_REQUIRED=1.8.1
> >> -XCBPRESENT_REQUIRED=1.13
> >> +XCBPRESENT_MODIFIERS_REQUIRED=1.13
> >>  XDAMAGE_REQUIRED=1.1
> >>  XSHMFENCE_REQUIRED=1.1
> >>  XVMC_REQUIRED=1.0.6
> >> @@ -1851,8 +1851,14 @@ fi
> >>  if test x"$enable_dri3" = xyes; then
> >>      DEFINES="$DEFINES -DHAVE_DRI3"
> >>
> >> -    dri3_modules="x11-xcb xcb >= $XCB_REQUIRED xcb-dri3 >= $XCBDRI3_REQUIRED xcb-xfixes xcb-present >= $XCBPRESENT_REQUIRED xcb-sync xshmfence >= $XSHMFENCE_REQUIRED"
> >> +    dri3_modules="x11-xcb xcb >= $XCB_REQUIRED xcb-dri3 xcb-xfixes xcb-present xcb-sync xshmfence >= $XSHMFENCE_REQUIRED"
> >>      PKG_CHECK_MODULES([XCB_DRI3], [$dri3_modules])
> >> +    dri3_modifier_modules="xcb-dri3 >= $XCBDRI3_MODIFIERS_REQUIRED xcb-present >= $XCBPRESENT_MODIFIERS_REQUIRES"
> >> +    PKG_CHECK_MODULES([XCB_DRI3_MODIFIERS], [$dri3_modifier_modules], [have_dri3_modifiers=yes], [have_dri3_modifiers=no])
> >> +
> >> +    if test "x$have_dri3_modifiers" == xyes; then
> >> +        DEFINES="$DEFINES -DHAVE_DRI3_MODIFIERS"
> >> +    fi
> >>  fi
> >>
> >>  AM_CONDITIONAL(HAVE_PLATFORM_X11, echo "$platforms" | grep -q 'x11')
> >> diff --git a/meson.build b/meson.build
> >> index 3c63f38438..0012815254 100644
> >> --- a/meson.build
> >> +++ b/meson.build
> >> @@ -1235,7 +1235,7 @@ if with_platform_x11
> >>      dep_xcb_dri2 = dependency('xcb-dri2', version : '>= 1.8')
> >>
> >>      if with_dri3
> >> -      pre_args += '-DHAVE_DRI3'
> >> +      pre_args += '-DHAVE_DRI3 -DHAVE_DRI3_MODIFIERS'
> >
> > That should be `pre_args += ['-DHAVE_DRI3', '-DHAVE_DRI3_MODFIERS']`
> >
> > I don't personally care about libxcb < 1.13, so this approach is fine with me. I
> > don't the that the version of meson that ships with any of the LTS/EL type
> > releases this matters for will build mesa anyway.
> >
> 
> fwiw, f27 doesn't (yet?) have xcb 1.13, which makes me wonder who else
> (who isn't building their own xcb) does, other than rawhide and
> similar bleeding edge distro versions.. f27 isn't exactly ancient,
> which makes me think the hard dependency on xcb 1.13 is a bit
> premature.

Archlinux does! You know, the distro that ships the latest version, whether it
works or not! ;)

Dylan
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