Fix build due a clang bug on nested macros

Prior to GCC14, the `__arm_streaming` macro was not spelled as an attribute
using the CXX11 syntax (e.g: [[arm::streaming]]) and so clang expanded that
macro macro.

But since GCC14, it's spelled as `[[arm::streaming]]` which makes clang to
try expanding the attribute again and generating an invalid preprocessing
token due the nested macro usage:

/usr/include/clang/Basic/AttrTokenKinds.inc:9:1: error: pasting "kw_" and "[" does not give a valid preprocessing token
    9 | KEYWORD_ATTRIBUTE(__arm_streaming)

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

gallium-Undef-__arm_streaming-macro-to-workaround-cl.patch

@@ -0,0 +1,96 @@
+From bc99ffc770879ff8633128f74dad3159ce3206d3 Mon Sep 17 00:00:00 2001
+From: Javier Martinez Canillas <javierm@redhat.com>
+Date: Fri, 19 Jan 2024 12:21:07 +0100
+Subject: [PATCH] gallium: Undef __arm_streaming macro to workaround clang
+ nested expansion
+
+Prior to GCC14, the `__arm_streaming` macro was not spelled as an attribute
+using the CXX11 syntax (e.g: [[arm::streaming]]) and so clang expanded that
+macro macro.
+
+But since GCC14, it's spelled as `[[arm::streaming]]` which makes clang to
+try expanding the attribute again and generating an invalid preprocessing
+token due the nested macro usage:
+
+/usr/include/clang/Basic/AttrTokenKinds.inc:9:1: error: pasting "kw_" and "[" does not give a valid preprocessing token
+    9 | KEYWORD_ATTRIBUTE(__arm_streaming)
+
+Until this is fixed in clang, let's undefine the __arm_streaming macro.
+
+Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
+---
+ src/compiler/clc/clc_helpers.cpp                      | 2 ++
+ src/gallium/frontends/clover/llvm/codegen/bitcode.cpp | 2 ++
+ src/gallium/frontends/clover/llvm/codegen/common.cpp  | 2 ++
+ src/gallium/frontends/clover/llvm/codegen/native.cpp  | 2 ++
+ src/gallium/frontends/clover/llvm/invocation.cpp      | 2 ++
+ 5 files changed, 10 insertions(+)
+
+diff --git a/src/compiler/clc/clc_helpers.cpp b/src/compiler/clc/clc_helpers.cpp
+index 15af4b44c6ce..f8cf4afe74a7 100644
+--- a/src/compiler/clc/clc_helpers.cpp
++++ b/src/compiler/clc/clc_helpers.cpp
+@@ -23,6 +23,8 @@
+ // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ // OTHER DEALINGS IN THE SOFTWARE.
+ 
++#undef __arm_streaming
++
+ #include <filesystem>
+ #include <sstream>
+ #include <mutex>
+diff --git a/src/gallium/frontends/clover/llvm/codegen/bitcode.cpp b/src/gallium/frontends/clover/llvm/codegen/bitcode.cpp
+index 568bdd993f59..00e10672f973 100644
+--- a/src/gallium/frontends/clover/llvm/codegen/bitcode.cpp
++++ b/src/gallium/frontends/clover/llvm/codegen/bitcode.cpp
+@@ -31,6 +31,8 @@
+ /// after linking against other bitcode object files.
+ ///
+ 
++#undef __arm_streaming
++
+ #include <llvm/Support/Allocator.h>
+ 
+ #include "llvm/codegen.hpp"
+diff --git a/src/gallium/frontends/clover/llvm/codegen/common.cpp b/src/gallium/frontends/clover/llvm/codegen/common.cpp
+index fe5fc768bcd5..f659b35283b5 100644
+--- a/src/gallium/frontends/clover/llvm/codegen/common.cpp
++++ b/src/gallium/frontends/clover/llvm/codegen/common.cpp
+@@ -30,6 +30,8 @@
+ /// understood by pipe drivers.
+ ///
+ 
++#undef __arm_streaming
++
+ #include <llvm/IR/Type.h>
+ #include <llvm/Support/Allocator.h>
+ 
+diff --git a/src/gallium/frontends/clover/llvm/codegen/native.cpp b/src/gallium/frontends/clover/llvm/codegen/native.cpp
+index 72046c8a1881..e115e06cbbb6 100644
+--- a/src/gallium/frontends/clover/llvm/codegen/native.cpp
++++ b/src/gallium/frontends/clover/llvm/codegen/native.cpp
+@@ -27,6 +27,8 @@
+ /// executable code as an ELF object file.
+ ///
+ 
++#undef __arm_streaming
++
+ #include <llvm/Target/TargetMachine.h>
+ #include <llvm/Transforms/Utils/Cloning.h>
+ 
+diff --git a/src/gallium/frontends/clover/llvm/invocation.cpp b/src/gallium/frontends/clover/llvm/invocation.cpp
+index 6ab32befbcd3..287af9891015 100644
+--- a/src/gallium/frontends/clover/llvm/invocation.cpp
++++ b/src/gallium/frontends/clover/llvm/invocation.cpp
+@@ -24,6 +24,8 @@
+ // OTHER DEALINGS IN THE SOFTWARE.
+ //
+ 
++#undef __arm_streaming
++
+ #include <llvm/IR/DiagnosticPrinter.h>
+ #include <llvm/IR/DiagnosticInfo.h>
+ #include <llvm/IR/LLVMContext.h>
+-- 
+2.43.0
+

mesa.spec

@@ -74,6 +74,8 @@ Source0:        https://archive.mesa3d.org/mesa-%{ver}.tar.xz
 Source1:        Mesa-MLAA-License-Clarification-Email.txt
 
 Patch10:        gnome-shell-glthread-disable.patch
+# Workaround for llvm/clang bug: https://github.com/llvm/llvm-project/issues/78691
+Patch11:        gallium-Undef-__arm_streaming-macro-to-workaround-cl.patch
 
 BuildRequires:  meson >= 1.2.0
 BuildRequires:  gcc