commit:     fd8438899cccdef5d8f3f50d37d7484d38a07af3
Author:     Viorel Munteanu <ceamac <AT> gentoo <DOT> org>
AuthorDate: Mon Nov 24 16:27:11 2025 +0000
Commit:     Viorel Munteanu <ceamac <AT> gentoo <DOT> org>
CommitDate: Mon Nov 24 16:58:44 2025 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=fd843889

media-libs/mesa-amber: attempt to fix crash

media-libs/mesa became incompatible with media-libs/mesa-amber.
Rename mesa-amber libraries and install them alongside.
Rename 50_amber.json to 55_amber.json so 50_mesa.json has higher
priority.  Without this change, xorg can crash.

For Intel, Mesa provides crocus and iris, Mesa Amber provides the older i965.
Tested with an Intel HD 4600.
XOrg:
- modesetting driver uses crocus and works
- intel driver can use crocus and i965, works with both.
Wayland:
- i965 works, but lacks some features that crocus has.
- crocus works great.

For Radeon r200:
Mesa alone has no driver for this, Mesa Amber has a driver for r200.
XOrg:
- r200 works, glxinfo shows some OpenGL.
Wayland:
- does not work.  Even if the r200 driver works, it lacks a needed
  extension for wayland to start.
With -r3 eglinfo does not crash (it did crash with -r2).
Also we can run sway with pixman now, it was crashing with -r2.

Bug: https://bugs.gentoo.org/945373
Signed-off-by: Viorel Munteanu <ceamac <AT> gentoo.org>

 .../files/mesa-amber-21.3.9-libnames.patch         |  37 ++++
 media-libs/mesa-amber/mesa-amber-21.3.9-r3.ebuild  | 221 +++++++++++++++++++++
 2 files changed, 258 insertions(+)

diff --git a/media-libs/mesa-amber/files/mesa-amber-21.3.9-libnames.patch 
b/media-libs/mesa-amber/files/mesa-amber-21.3.9-libnames.patch
new file mode 100644
index 000000000000..8603152e2ff2
--- /dev/null
+++ b/media-libs/mesa-amber/files/mesa-amber-21.3.9-libnames.patch
@@ -0,0 +1,37 @@
+https://bugs.gentoo.org/945373
+
+media-libs/mesa became incompatible with media-libs/mesa-amber.
+The best way to deal with this seems to be to rename mesa-amber
+libraries and install them alongside.
+
+This patch renames libgbm.so to libgbm-amber.so and libglapi.so to
+libglapi-amber.so, so mesa-amber drivers can use their own libraries.
+
+--- a/src/gbm/meson.build
++++ b/src/gbm/meson.build
+@@ -45,8 +45,10 @@ if with_platform_wayland
+   incs_gbm += inc_wayland_drm
+ endif
+ 
++gbm_lib_name = 'gbm_@0@'.format(glvnd_vendor_name)
++
+ libgbm = shared_library(
+-  'gbm',
++  gbm_lib_name,
+   files_gbm,
+   include_directories : incs_gbm,
+   c_args : [args_gbm],
+--- a/src/mapi/shared-glapi/meson.build
++++ b/src/mapi/shared-glapi/meson.build
+@@ -41,8 +41,10 @@ if with_platform_windows
+   _glapi_c_args += ['-D_GLAPI_DLL_EXPORTS']
+ endif
+ 
++glapi_lib_name = 'glapi_@0@'.format(glvnd_vendor_name)
++
+ libglapi = shared_library(
+-  'glapi',
++  glapi_lib_name,
+   [files_mapi_glapi, files_mapi_util, shared_glapi_mapi_tmp_h],
+   c_args : [
+     _glapi_c_args,

diff --git a/media-libs/mesa-amber/mesa-amber-21.3.9-r3.ebuild 
b/media-libs/mesa-amber/mesa-amber-21.3.9-r3.ebuild
new file mode 100644
index 000000000000..3a79fce918f2
--- /dev/null
+++ b/media-libs/mesa-amber/mesa-amber-21.3.9-r3.ebuild
@@ -0,0 +1,221 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit meson-multilib python-any-r1 linux-info
+
+MY_P="${P/-amber}"
+MY_P="${MY_P/_/-}"
+
+DESCRIPTION="OpenGL-like graphic library for Linux"
+HOMEPAGE="https://docs.mesa3d.org/amber.html";
+
+if [[ ${PV} == 9999 ]]; then
+       EGIT_REPO_URI="https://gitlab.freedesktop.org/mesa/mesa.git";
+       inherit git-r3
+else
+       SRC_URI="https://archive.mesa3d.org/${MY_P}.tar.xz";
+       KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~mips ~ppc ~ppc64 ~riscv ~s390 
~sparc ~x86 ~amd64-linux ~x86-linux ~x64-solaris"
+fi
+
+S="${WORKDIR}/${MY_P}"
+EGIT_CHECKOUT_DIR=${S}
+
+LICENSE="MIT SGI-B-2.0"
+SLOT="amber"
+
+RADEON_CARDS="r100 r200 radeon"
+VIDEO_CARDS="${RADEON_CARDS} i915 i965 intel nouveau"
+for card in ${VIDEO_CARDS}; do
+       IUSE_VIDEO_CARDS+=" video_cards_${card}"
+done
+
+IUSE="${IUSE_VIDEO_CARDS}
+       cpu_flags_x86_sse2 debug gles1 +gles2 selinux test valgrind wayland +X
+       +zstd"
+RESTRICT="!test? ( test )"
+
+LIBDRM_DEPSTRING=">=x11-libs/libdrm-2.4.107"
+RDEPEND="
+       !media-libs/mesa:amber
+       >=media-libs/mesa-25[${MULTILIB_USEDEP}]
+
+       >=dev-libs/expat-2.1.0-r3:=[${MULTILIB_USEDEP}]
+       >=media-libs/libglvnd-1.3.2[X?,${MULTILIB_USEDEP}]
+       >=virtual/zlib-1.2.8:=[${MULTILIB_USEDEP}]
+       selinux? ( sys-libs/libselinux[${MULTILIB_USEDEP}] )
+       wayland? (
+               >=dev-libs/wayland-1.18.0:=[${MULTILIB_USEDEP}]
+               >=dev-libs/wayland-protocols-1.8
+       )
+       ${LIBDRM_DEPSTRING}[video_cards_nouveau?,${MULTILIB_USEDEP}]
+       video_cards_intel? (
+               !video_cards_i965? ( ${LIBDRM_DEPSTRING}[video_cards_intel] )
+       )
+       video_cards_i915? ( ${LIBDRM_DEPSTRING}[video_cards_intel] )
+       X? (
+               >=x11-libs/libX11-1.6.2:=[${MULTILIB_USEDEP}]
+               >=x11-libs/libxshmfence-1.1:=[${MULTILIB_USEDEP}]
+               >=x11-libs/libXext-1.3.2:=[${MULTILIB_USEDEP}]
+               >=x11-libs/libXxf86vm-1.1.3:=[${MULTILIB_USEDEP}]
+               >=x11-libs/libxcb-1.13:=[${MULTILIB_USEDEP}]
+               x11-libs/libXfixes:=[${MULTILIB_USEDEP}]
+       )
+       zstd? ( app-arch/zstd:=[${MULTILIB_USEDEP}] )
+"
+for card in ${RADEON_CARDS}; do
+       RDEPEND="${RDEPEND}
+               video_cards_${card}? ( ${LIBDRM_DEPSTRING}[video_cards_radeon] )
+       "
+done
+
+DEPEND="${RDEPEND}
+       valgrind? ( dev-debug/valgrind )
+       X? (
+               x11-libs/libXrandr[${MULTILIB_USEDEP}]
+               x11-base/xorg-proto
+       )
+"
+BDEPEND="
+       ${PYTHON_DEPS}
+       app-alternatives/yacc
+       app-alternatives/lex
+       virtual/pkgconfig
+       $(python_gen_any_dep ">=dev-python/mako-0.8.0[\${PYTHON_USEDEP}]")
+       wayland? ( dev-util/wayland-scanner )
+"
+
+QA_WX_LOAD="
+x86? (
+       usr/lib/libGLX_amber.so.0.0.0
+       usr/lib/libglapi_amber.so.0.0.0
+)"
+
+PATCHES=(
+       "${FILESDIR}"/${PN}-i915c.patch
+       "${FILESDIR}"/${P}-gcc-15.patch
+       "${FILESDIR}"/${P}-libnames.patch
+)
+
+python_check_deps() {
+       python_has_version ">=dev-python/mako-0.8.0[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+       if use video_cards_i965; then
+               if kernel_is -ge 5 11 3; then
+                       CONFIG_CHECK="~KCMP"
+               elif kernel_is -ge 5 11; then
+                       CONFIG_CHECK="~CHECKPOINT_RESTORE"
+               elif kernel_is -ge 5 10 20; then
+                       CONFIG_CHECK="~KCMP"
+               else
+                       CONFIG_CHECK="~CHECKPOINT_RESTORE"
+               fi
+               linux-info_pkg_setup
+       fi
+
+       python-any-r1_pkg_setup
+}
+
+src_prepare() {
+       default
+       sed -i -e "/^PLATFORM_SYMBOLS/a '__gentoo_check_ldflags__'," \
+               bin/symbols-check.py || die # bug #843983
+}
+
+multilib_src_configure() {
+       local emesonargs=()
+
+       # Intel code
+       dri_driver_enable video_cards_i915 i915
+       dri_driver_enable video_cards_i965 i965
+       if ! use video_cards_i915 && \
+               ! use video_cards_i965; then
+               dri_driver_enable video_cards_intel i915 i965
+       fi
+
+       # Nouveau code
+       dri_driver_enable video_cards_nouveau nouveau
+
+       # ATI code
+       dri_driver_enable video_cards_r100 r100
+       dri_driver_enable video_cards_r200 r200
+       if ! use video_cards_r100 && \
+               ! use video_cards_r200; then
+               dri_driver_enable video_cards_radeon r100 r200
+       fi
+
+       local platforms
+       use X && platforms+="x11"
+       use wayland && platforms+=",wayland"
+       emesonargs+=(-Dplatforms=${platforms#,})
+
+       driver_list() {
+               local drivers="$(sort -u <<< "${1// /$'\n'}")"
+               echo "${drivers//$'\n'/,}"
+       }
+
+       use debug && EMESON_BUILDTYPE=debug
+
+       emesonargs+=(
+               -Damber=true
+               $(meson_use test build-tests)
+               -Dglx=$(usex X dri disabled)
+               -Dshared-glapi=enabled
+               -Ddri3=enabled
+               -Degl=enabled
+               -Dgbm=enabled
+               $(meson_feature gles1)
+               $(meson_feature gles2)
+               -Dglvnd=true
+               -Dosmesa=false
+               -Dllvm=disabled
+               $(meson_use selinux)
+               $(meson_feature zstd)
+               $(meson_use cpu_flags_x86_sse2 sse2)
+               -Dvalgrind=$(usex valgrind auto disabled)
+               -Ddri-drivers=$(driver_list "${DRI_DRIVERS[*]}")
+               -Dgallium-drivers=''
+               -Dvulkan-drivers=''
+               -Db_ndebug=$(usex debug false true)
+       )
+       meson_src_configure
+}
+
+multilib_src_test() {
+       meson_src_test -t 100
+}
+
+multilib_src_install_all() {
+       # These are provided by media-libs/mesa:0
+       local files=(
+               "${ED}"/usr/include
+               "${ED}"/usr/lib*/pkgconfig
+               "${ED}"/usr/share/drirc.d/00-mesa-defaults.conf
+       )
+       rm -r "${files[@]}" || die
+
+       # Move i915_dri.so -> i915c_dri.so to not conflict with 
media-libs/mesa:0.
+       for dridir in "${ED}"/usr/lib*/dri; do
+               if [[ -e ${dridir}/i915_dri.so ]]; then
+                       mv ${dridir}/i915{,c}_dri.so || die
+               fi
+       done
+
+       # Move the glvnd file after the one provided by mesa, to have lower 
priority
+       mv "${ED}"/usr/share/glvnd/egl_vendor.d/50_amber.json \
+               "${ED}"/usr/share/glvnd/egl_vendor.d/55_amber.json || die
+}
+
+# $1 - VIDEO_CARDS flag (check skipped for "--")
+# other args - names of DRI drivers to enable
+dri_driver_enable() {
+       if [[ $1 == -- ]] || use $1; then
+               shift
+               DRI_DRIVERS+=("$@")
+       fi
+}

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