gnu: Add llvm-for-rocm.

* gnu/packages/rocm.scm (llvm-for-rocm): New variable.
* gnu/packages/patches/llvm-roc-3.0.0-add_libraries.patch,
gnu/packages/patches/llvm-roc-4.0.0-remove-isystem-usr-include.patch,
gnu/packages/patches/llvm-roc-4.2.0-add_Object.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.

1 files changed, 35 insertions, 0 deletions

diff --git a/gnu/packages/rocm.scm b/gnu/packages/rocm.scm
index b04eb8050e..17685c7bcb 100644
--- a/gnu/packages/rocm.scm
+++ b/gnu/packages/rocm.scm
@@ -55,3 +55,38 @@
     (description "ROCm cmake modules provides cmake modules for common build
 tasks needed for the ROCM software stack.")
     (license license:ncsa)))
+
+(define-public llvm-for-rocm
+  (hidden-package
+   (package
+     ;; Actually based on LLVM 13 as of v4.3, but llvm-12 works just fine.
+     (inherit llvm-12)
+     (name "llvm-for-rocm")
+     (version %rocm-version)
+     (source (origin
+               (method git-fetch)
+               (uri (git-reference
+                     (url "https://github.com/RadeonOpenCompute/llvm-project.git")
+                     (commit (string-append "rocm-" version))))
+               (file-name (git-file-name name version))
+               (sha256
+                (base32
+                 "0p75nr1qpmy6crymdax5hm40wkimman4lnglz4x5cnbiqindya7s"))
+               (patches
+                (search-patches "llvm-roc-4.2.0-add_Object.patch"
+                                "llvm-roc-3.0.0-add_libraries.patch"
+                                "llvm-roc-4.0.0-remove-isystem-usr-include.patch"))))
+     (arguments
+      (substitute-keyword-arguments (package-arguments llvm-12)
+        ((#:phases phases '%standard-phases)
+         `(modify-phases ,phases
+            (add-after 'unpack 'chdir
+              (lambda _
+                (chdir "llvm")))))
+        ((#:configure-flags flags)
+         ''("-DLLVM_ENABLE_PROJECTS=llvm;clang;lld"
+            "-DLLVM_TARGETS_TO_BUILD=AMDGPU;X86"
+            "-DCMAKE_SKIP_BUILD_RPATH=FALSE"
+            "-DCMAKE_BUILD_WITH_INSTALL_RPATH=FALSE"
+            "-DBUILD_SHARED_LIBS:BOOL=TRUE"
+            "-DLLVM_VERSION_SUFFIX=")))))))