Arch Linux User Repository

removed obsolete options, build now works again.

building opencl clover is disabled for now, see https://gitlab.freedesktop.org/mesa/mesa/-/issues/11863

Those that need opencl should use rusticl instead. Note that rusticl at runtime is disabled by default, see https://docs.mesa3d.org/envvars.html#rusticl-environment-variables for info about enabling it.

Mesa and llvm are closely tied together. Everytime the llvm mesa is built against changes/updates , mesa needs to be rebuilt.

I expect anyone building mesa-git against one of the llvm trunk variants to be able to do that themselves, but atleast some of the people that built against repo llvm don't understand how to deal with such a rebuild.

The rest of this post is meant for those people.

• Verify if latest PKGBUILD requirements match llvm repo versions.
• If they don't , post to alert the maintainer of this.
• DELAY the update of llvm/clang suite and their lib32- counterparts
• Once the PKGBUILD does match, download it.

Option A - best one

• run pacman -Syu to ensure your system is in sync with your mirrror server
• build mesa-git in a clean chroot

see https://wiki.archlinux.org/index.php/DeveloperWiki:Building_in_a_clean_chroot for the official way or https://aur.archlinux.org/packages/clean-chroot-manager for an alternative method.

• install the newly built mesa-git
• run pacman -Syu
• ready

Option B - 2nd best

• revert to repo mesa
• pacman -Syu
• build mesa-git
• switch from mesa to mesa-git
• ready

• choosing which llvm variant to build against

WARNING : aur helpers don't support this method at all. They check .SRCINFO and that doesn't include this variable so it will use the default which is hardcoded to build against repo llvm.

Why would I want to use llvm development versions ?

For full functionality and latest features mesa trunk master needs to be build against llvm trunk master.
If you build against stable llvm things MAY work, but you're likely to lack some features and face stability issues.

Mesa-git uses a custom environment variable MESA_WHICH_LLVM for flexibility.
It has 4 values.
1 : aur llvm-minimal-git
2 : aur llvm-git
3: llvm-git from LordHeavy' unofficial repo
4: llvm from extra repo

I use value 1 95% of the time and set this in ~/.bash_rc .
If MESA_WHICH_LLVM is unset or empty, the default value of 4 (extra llvm) is used.

• main difference with stable repo package

[extra]mesa is a split package, but aur mesa-git isn't.
Basically with aur mesa-git you get everything in one package, while [extra]/mesa allows you to leave out some parts if you don't want/need them.
Having a single package reduces maintenance and makes switching from stable to mesa-git rather easy, though reverting back to stable can be tricky.

• meson settings

Those who compare PKGBUILDs will notice I don't use arch-meson, but meson setup.
I disagree with some of the settings made by arch-meson (especially the buildtype and enabling LTO by default) and feel using meson setup is cleaner.

• how to update

run pacman Syu update non-repo packages for llvm if you use them

build mesa-git, log out , update mesa-git and restart X .

run glxinfo -B to verify basic OpenGL functionality

build lib32-mesa-git

run glxinfo32 -B to verify basic OpenGL functionality for multilib programs

Do setting b_lto=false to meson enough to disable lto?

with the default makepkg.conf now enable lto by default.(pacman 6.0.2-9)

OPTIONS=(strip docs !libtool !staticlibs emptydirs zipman purge debug lto)

It look like the package still build with lto enable.
meson still passed -flto=auto to compiler and lto1 is still ran.

Changing CFLAGS, CXXFLAGS, and RUSTFLAGS before building seem to fix it.

diff --git a/PKGBUILD b/PKGBUILD
index 6dfeb20..b395178 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -118,6 +118,27 @@ prepare() {
 }

 build () {
+    remove_lto () {
+        local flags_tmp i
+        mapfile -t flags_tmp < <(printf '%s\n' $1)
+        i=0
+        for flag in "${flags_tmp[@]}"
+        do
+            if [[ "${flag}" = *'-flto='* ]]
+            then
+                unset 'flags_tmp[i]'
+                if [ "${flags_tmp[$((i-1))]}" = "-C" ]
+                then
+                    unset "flags_tmp[$((i-1))]"
+                fi
+            fi
+            ((++i))
+        done
+        echo "${flags_tmp[*]}"
+        }
+        export CFLAGS=$(remove_lto "$CFLAGS")
+        export CXXFLAGS=$(remove_lto "$CXXFLAGS")
+        export RUSTFLAGS=$(remove_lto "$RUSTFLAGS")
     meson setup mesa _build \
        -D b_ndebug=true \
        -D b_lto=false \

@Beiruty, those have the same cause as the other recent build failures : changes in intel drivers.

The build issues caused by changes in intel drivers are now solved for MESA_WHICH_LLVM 1, 3 and 4 (llvm-minimal-git , llvm from lordheavy unofficial repo and offical repo llvm )

MESA_WHICH_LLVM 2 (aur llvm-git) build is still broken, but I MAY have a solution for that without having to create new packages.

The good news is that once all 4 variants built again, only minor changes should be needed to add opencl clover & opencl rusticl support.

(A lot of the work required to built the intel drivers is also useful for clover & rusticl)

Just now, I got this error. I need the RadeonSI driver only

 
Compiler for C supports link arguments -Wl,-z,relro: YES (cached)
Adding test "genxml sort gen4.xml"
Adding test "genxml sort gen45.xml"
Adding test "genxml sort gen5.xml"
Adding test "genxml sort gen6.xml"
Adding test "genxml sort gen7.xml"
Adding test "genxml sort gen75.xml"
Adding test "genxml sort gen8.xml"
Adding test "genxml sort gen9.xml"
Adding test "genxml sort gen11.xml"
Adding test "genxml sort gen12.xml"
Adding test "genxml sort gen125.xml"
Adding test "genxml sort gen20.xml"
Adding test "genxml sort gen125_rt.xml"
Adding test "genxml sort gen20_rt.xml"
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
WARNING: Tried to mix libraries for machines build machine and host machine in target 'intel_clc' This will fail in cross build.
mesa/src/intel/shaders/meson.build:51: WARNING: Project targets '>= 1.1.0' but uses feature deprecated since '0.56.0': meson.source_root. use meson.project_source_root() or meson.global_source_root() instead.
mesa/src/intel/shaders/meson.build:52: WARNING: Project targets '>= 1.1.0' but uses feature deprecated since '0.56.0': meson.source_root. use meson.project_source_root() or meson.global_source_root() instead.
mesa/src/intel/shaders/meson.build:53: WARNING: Project targets '>= 1.1.0' but uses feature deprecated since '0.56.0': meson.build_root. use meson.project_build_root() or meson.global_build_root() instead.
mesa/src/intel/shaders/meson.build:54: WARNING: Project targets '>= 1.1.0' but uses feature deprecated since '0.56.0': meson.source_root. use meson.project_source_root() or meson.global_source_root() instead.
Running command: /usr/bin/python3 -c '
import ply
  '
--- stdout ---

--- stderr ---
Traceback (most recent call last):
  File "<string>", line 2, in <module>
ModuleNotFoundError: No module named 'ply'



mesa/src/intel/vulkan/grl/meson.build:77:2: ERROR: Problem encountered: Python (3.x) ply module required to build GRL kernels.

It's definite now it seems, in merge request !27645, the option to disable intel-clc has been removed, having a hard dependency for libclc in anv, crocus, iris.. https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27645/diffs?commit_id=dbdf546fd6562b56df6da4d79c4057e1e30e0755

If I build crocus on x86_64 without OpenCL and libclc I get: mesa/src/intel/shaders/meson.build:45:6: ERROR: Unknown variable "prog_intel_clc".

Which is sad, having Crocus as a backup is important to me, but I don't need OpenCL right now

Yes, the build problem can be solved by adding extra dependencies but there are atleast 5 involved and it's not clear yet how many of them are also required at runtime.

about ccache : makepkg only supports 1 method for enabling / disabling ccache and that is done through BUILDENV in makepkg.conf .

see https://wiki.archlinux.org/title/Ccache#Enable_ccache_for_makepkg

If enabling/disabling through BUILDENV doesn't work, there's a severe error in your local build environment.

I also got a problem with CCache on Manjaro. I didn't change anything in the ccache setup and the mesa-git package was buildin before without problem. I fixed the problem with

diff --git a/PKGBUILD b/PKGBUILD
index e8fc010..a0cdb96 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -119,6 +119,13 @@ prepare() {
 }

 build () {
+# EITHER:
+#    mkdir -p /tmp/ccache
+#    CCACHE_DIR="/tmp/ccache"
+#    CCACHE_SIZE="10.0G"
+# OR:
+    export CCACHE_DISABLE=1
+
     meson setup mesa _build \
        -D b_ndebug=true \
        -D b_lto=false \

diff --git a/PKGBUILD b/PKGBUILD
index f0ec176..435eaaa 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -22,7 +22,7 @@ makedepends=('git' 'python-mako' 'xorgproto'
 depends=('libdrm' 'libxxf86vm' 'libxdamage' 'libxshmfence' 'libelf'
          'libomxil-bellagio' 'libunwind' 'libglvnd' 'wayland' 'lm_sensors' 
          'vulkan-icd-loader' 'zstd' 'expat' 'gcc-libs' 'libxfixes' 'libx11' 'systemd-libs' 'libxext' 'libxcb'
-         'glibc' 'zlib'
+         'glibc' 'zlib' 'spirv-llvm-translator' 'libclc'
 )
 optdepends=('opengl-man-pages: for the OpenGL API man pages')
 provides=('mesa' 'vulkan-intel' 'vulkan-radeon' 'vulkan-mesa-layers' 'libva-mesa-driver' 'mesa-vdpau' 'vulkan-swrast' 'vulkan-driver' 'mesa-libgl' 'opengl-driver')

I tried to build package this morning, but found missing dependancies to be installed by hand: 'spirv-llvm-translator' 'libclc'

I also had to setup a seprate CCACHE directory, because the default setup for CCACHE resulted in a 'ccache: error: Permission denied' problem.

mesag-git now builds and installs

Intel Crocus has a hard dependency on Opencl too: mesa/src/intel/shaders/meson.build:45:6: ERROR: Unknown variable "prog_intel_clc".

Intel doesn't look like it's going to fix this: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27593#note_2281519