Fix disabling amdgpu on non-Linux

debian/changelog

@@ -7,6 +7,9 @@ llvm-toolchain-15 (1:15.0.7-2) UNRELEASED; urgency=medium
   * Update print lldb python patch, following what was done
     in automake for newer python
 
+  [ Samuel Thibault ]
+  * Fix disabling amdgpu on non-Linux.
+
  -- Sylvestre Ledru <sylvestre@debian.org>  Sun, 15 Jan 2023 10:54:41 +0100
 
 llvm-toolchain-15 (1:15.0.7-1) unstable; urgency=medium

debian/patches/amdgpu-nonlinux.patch

@@ -0,0 +1,20 @@
+https://reviews.llvm.org/D143017
+
+[Libomptarget] Fix disabling amdgpu on non-Linux.
+
+Previously, on non-Linux, amdgpu would get enabled whatever the CPU
+architecture.
+
+Index: llvm-toolchain-15-15.0.7/openmp/libomptarget/plugins/amdgpu/CMakeLists.txt
+===================================================================
+--- llvm-toolchain-15-15.0.7.orig/openmp/libomptarget/plugins/amdgpu/CMakeLists.txt
++++ llvm-toolchain-15-15.0.7/openmp/libomptarget/plugins/amdgpu/CMakeLists.txt
+@@ -27,7 +27,7 @@ if(NOT LIBOMPTARGET_DEP_LIBELF_FOUND)
+   return()
+ endif()
+ 
+-if(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(ppc64le)|(aarch64)$" AND CMAKE_SYSTEM_NAME MATCHES "Linux")
++if(NOT (CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(ppc64le)|(aarch64)$" AND CMAKE_SYSTEM_NAME MATCHES "Linux"))
+   libomptarget_say("Not building AMDGPU plugin: only support AMDGPU in Linux x86_64, ppc64le, or aarch64 hosts")
+   return()
+ endif()

debian/patches/series

@@ -158,3 +158,5 @@ protobuf_3.21.patch
 add-arm-vcmpz-test.patch
 fix-mesa-build.patch
 link-grpc.diff
+
+amdgpu-nonlinux.patch