[PATCH v4 9/9] mesa: add support for RustiCL under PACKAGECONFIG "opencl"

[Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>]

From: Zoltán Böszörményi <zboszor@gmail.com>

Mesa now has two OpenCL implementations: Clover (older one) and RustiCL
(newer one). Extend the "opencl" package config to include both
implementations into the libopencl-mesa (-dev) packages. As the Clover
implementation is in maintenance mode and is expected to be removed at
Mesa 25.2, it doesn't make sense to split the packages or to provide
two config options.

Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com>
[DB: merged "rusticl" and "clover" back to "opencl", reworked rust inheritance]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 ...vide-cross-compilation-arguments-to-LLVM-.patch | 67 ++++++++++++++++++++++
 meta/recipes-graphics/mesa/mesa.inc                | 20 +++++--
 2 files changed, 82 insertions(+), 5 deletions(-)

diff --git a/meta/recipes-graphics/mesa/files/0001-rusticl-provide-cross-compilation-arguments-to-LLVM-.patch b/meta/recipes-graphics/mesa/files/0001-rusticl-provide-cross-compilation-arguments-to-LLVM-.patch
new file mode 100644
index 0000000000000000000000000000000000000000..9506a43376857afdf271aed3e08b8f0e3b54081b
--- /dev/null
+++ b/meta/recipes-graphics/mesa/files/0001-rusticl-provide-cross-compilation-arguments-to-LLVM-.patch
@@ -0,0 +1,67 @@
+From b9cf34f39ca7e7546508ce2ab1f053edef5fc201 Mon Sep 17 00:00:00 2001
+From: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
+Date: Wed, 26 Mar 2025 17:47:09 +0200
+Subject: [PATCH] rusticl: provide cross-compilation arguments to LLVM bindgen
+ invocation
+
+Correctly generating LLVM bindings requires several croos-compilation
+arguments. Provide them to rust.bindgen(). Karol Herbst on IRC suggested
+that a proper fix should be to fix meson's rust.bindgen() to support
+cross-compilation. Carry this patch until meson is fixed.
+
+Upstream-Status: Inappropriate [OE-Specific]
+Link: https://github.com/mesonbuild/meson/issues/13591
+Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
+---
+ meson_options.txt                         | 14 ++++++++++++++
+ src/gallium/frontends/rusticl/meson.build |  8 ++++++++
+ 2 files changed, 22 insertions(+)
+
+diff --git a/meson_options.txt b/meson_options.txt
+index 0147cafcb146..f73e83fded18 100644
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -796,3 +796,17 @@ option(
+   value : false,
+   description : 'Install the drivers internal shader compilers (if needed for cross builds).'
+ )
++
++option(
++  'bindgen-includedir',
++  type : 'string',
++  value : '',
++  description : 'system-wide include directory for cross-generating LLVM bindings'
++  )
++
++option(
++  'bindgen-target',
++  type : 'string',
++  value : '',
++  description : 'Clang target for cross-generating LLVM bindings'
++  )
+diff --git a/src/gallium/frontends/rusticl/meson.build b/src/gallium/frontends/rusticl/meson.build
+index a5d1dcf3abb9..480c220b7f5f 100644
+--- a/src/gallium/frontends/rusticl/meson.build
++++ b/src/gallium/frontends/rusticl/meson.build
+@@ -180,13 +180,21 @@ rusticl_opencl_gen = static_library(
+   ],
+ )
+ 
++bindgen_c_args = []
++bindgen_target = get_option('bindgen-target')
++if bindgen_target != ''
++  bindgen_c_args += [ '-target', bindgen_target ]
++endif
++
+ rusticl_llvm_bindings_rs = rust.bindgen(
+   input : 'rusticl_llvm_bindings.hpp',
+   output : 'rusticl_llvm_bindings.rs',
+   c_args : [
+     rusticl_bindgen_c_args,
+     pre_args,
++    bindgen_c_args,
+   ],
++  include_directories : get_option('bindgen-includedir'),
+   dependencies : [
+     dep_clang,
+     dep_llvm,
diff --git a/meta/recipes-graphics/mesa/mesa.inc b/meta/recipes-graphics/mesa/mesa.inc
index 3518ac488d46012652b62094b913e5ae8ce9b111..4db08530bac9fd27a62ad9b8a336cfe072b0c20f 100644
--- a/meta/recipes-graphics/mesa/mesa.inc
+++ b/meta/recipes-graphics/mesa/mesa.inc
@@ -17,6 +17,7 @@ PE = "2"
 SRC_URI = "https://archive.mesa3d.org/mesa-${PV}.tar.xz \
            file://0001-meson-misdetects-64bit-atomics-on-mips-clang.patch \
            file://0001-freedreno-don-t-encode-build-path-into-binaries.patch\
+           file://0001-rusticl-provide-cross-compilation-arguments-to-LLVM-.patch \
 "
 
 SRC_URI[sha256sum] = "adf904d083b308df95898600ffed435f4b5c600d95fb6ec6d4c45638627fdc97"
@@ -45,7 +46,7 @@ PROVIDES = " \
     virtual/mesa \
     "
 
-inherit meson pkgconfig python3native gettext features_check
+inherit meson pkgconfig python3native gettext features_check rust
 
 BBCLASSEXTEND = "native nativesdk"
 
@@ -84,6 +85,9 @@ PACKAGECONFIG = " \
 	${@bb.utils.contains('DISTRO_FEATURES', 'vulkan', 'zink', '', d)} \
 "
 
+# skip all Rust dependencies if we are not building OpenCL"
+INHIBIT_DEFAULT_RUST_DEPS = "${@bb.utils.contains('PACKAGECONFIG', 'opencl', '', '1', d)}"
+
 PACKAGECONFIG:append:x86 = " libclc gallium-llvm"
 PACKAGECONFIG:append:x86-64 = " libclc gallium-llvm"
 PACKAGECONFIG:append:class-native = " libclc gallium-llvm r600"
@@ -139,9 +143,15 @@ PACKAGECONFIG[gles] = "-Dgles1=enabled -Dgles2=enabled, -Dgles1=disabled -Dgles2
 # "egl" requires "opengl"
 PACKAGECONFIG[egl] = "-Degl=enabled, -Degl=disabled"
 
+BINDGEN_TARGET = "${TARGET_ARCH}-${TARGET_OS}${@['-gnu', ''][d.getVar('LIBCEXTENSION') != '']}"
+
 # "opencl" also requires libclc and gallium-llvm to be present in PKGCONFIG!
 # Be sure to enable them both for the target and for the native build.
-PACKAGECONFIG[opencl] = "-Dgallium-opencl=icd,-Dgallium-opencl=disabled,"
+PACKAGECONFIG[opencl] = " \
+    -Dgallium-opencl=icd -Dgallium-rusticl=true -Dbindgen-includedir=${STAGING_INCDIR} -Dbindgen-target=${BINDGEN_TARGET},\
+    -Dgallium-opencl=disabled -Dgallium-rusticl=false, \
+    bindgen-cli-native \
+"
 
 PACKAGECONFIG[broadcom] = ""
 PACKAGECONFIG[etnaviv] = ",,python3-pycparser-native"
@@ -241,7 +251,7 @@ RDEPENDS:libgles3-mesa-dev += "libgles2-mesa-dev"
 RDEPENDS:libgles2-mesa += "libgles3-mesa"
 ALLOW_EMPTY:libgles3-mesa = "1"
 
-RDEPENDS:libopencl-mesa += "${@bb.utils.contains('PACKAGECONFIG', 'opencl', 'libclc spirv-tools', '', d)}"
+RDEPENDS:libopencl-mesa += "${@bb.utils.contains('PACKAGECONFIG', 'opencl', 'libclc spirv-tools spirv-llvm-translator', '', d)}"
 
 PACKAGES =+ "libegl-mesa libegl-mesa-dev \
              libosmesa libosmesa-dev \
@@ -347,7 +357,7 @@ FILES:libgles1-mesa = "${libdir}/libGLESv1*.so.*"
 FILES:libgles2-mesa = "${libdir}/libGLESv2.so.*"
 FILES:libgl-mesa = "${libdir}/libGL.so.*"
 FILES:libglx-mesa = "${libdir}/libGLX*.so.*"
-FILES:libopencl-mesa = "${libdir}/libMesaOpenCL.so.* ${libdir}/gallium-pipe/*.so ${sysconfdir}/OpenCL/vendors/mesa.icd"
+FILES:libopencl-mesa = "${libdir}/lib*OpenCL.so.* ${libdir}/gallium-pipe/*.so ${sysconfdir}/OpenCL/vendors/*.icd"
 FILES:libglapi = "${libdir}/libglapi.so.*"
 FILES:libosmesa = "${libdir}/libOSMesa.so.*"
 FILES:libxatracker = "${libdir}/libxatracker.so.*"
@@ -361,7 +371,7 @@ FILES:libglapi-dev = "${libdir}/libglapi.*"
 FILES:libgles1-mesa-dev = "${libdir}/libGLESv1*.* ${includedir}/GLES ${libdir}/pkgconfig/glesv1*.pc"
 FILES:libgles2-mesa-dev = "${libdir}/libGLESv2.* ${includedir}/GLES2 ${libdir}/pkgconfig/glesv2.pc"
 FILES:libgles3-mesa-dev = "${includedir}/GLES3"
-FILES:libopencl-mesa-dev = "${libdir}/libMesaOpenCL.so"
+FILES:libopencl-mesa-dev = "${libdir}/lib*OpenCL.so"
 FILES:libosmesa-dev = "${libdir}/libOSMesa.* ${includedir}/GL/osmesa.h ${libdir}/pkgconfig/osmesa.pc"
 FILES:libxatracker-dev = "${libdir}/libxatracker.so ${libdir}/libxatracker.la \
                           ${includedir}/xa_tracker.h ${includedir}/xa_composite.h ${includedir}/xa_context.h \

-- 
2.39.5