2 files changed, 139 insertions, 0 deletions
diff --git a/lib/spack/spack/build_systems/hip.py b/lib/spack/spack/build_systems/hip.py
new file mode 100644
index 0000000000..da44f1428d
--- /dev/null
+++ b/lib/spack/spack/build_systems/hip.py
@@ -0,0 +1,138 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+# Troubleshooting advice for +hip builds:
+#
+# 1. When building with clang, go your compilers.yaml,
+#    add an entry for the amd version of clang, as below.
+#    This will ensure that your entire package is compiled/linked
+#    with the same compiler version. If you use a different version of
+#    clang which is linked against a different version of the gcc library,
+#    you will get errors along the lines of:
+#    undefined reference to
+#       `std::__throw_out_of_range_fmt(char const*, ...)@@GLIBCXX_3.4.20'
+#    which is indicative of a mismatch in standard library versions.
+#
+#    in compilers.yaml
+#    - compiler:
+#        spec: clang@amd
+#        paths:
+#          cc: /opt/rocm/llvm/bin/clang
+#          cxx: /opt/rocm/llvm/bin/clang++
+#          f77:
+#          fc:
+#        flags: {}
+#        operating_system: rhel7
+#        target: x86_64
+#        modules: []
+#        environment: {}
+#        extra_rpaths: []
+#
+#
+# 2. hip and its dependencies are currently NOT picked up by spack
+#    automatically, and should therefore be added to packages.yaml by hand:
+#
+#    in packages.yaml:
+#    hip:
+#      externals:
+#      - spec: hip@3.8.20371-d1886b0b
+#        prefix: /opt/rocm/hip
+#        extra_attributes:
+#          compilers:
+#            c: /opt/rocm/llvm/bin/clang++
+#            c++: /opt/rocm/llvm/bin/clang++
+#            hip: /opt/rocm/hip/bin/hipcc
+#      buildable: false
+#    hsa-rocr-dev:
+#      externals:
+#      - spec: hsa-rocr-dev
+#        prefix: /opt/rocm
+#        extra_attributes:
+#          compilers:
+#            c: /opt/rocm/llvm/bin/clang++
+#            cxx: /opt/rocm/llvm/bin/clang++
+#      buildable: false
+#    llvm-amdgpu:
+#      externals:
+#      - spec: llvm-amdgpu
+#        prefix: /opt/rocm/llvm
+#        extra_attributes:
+#          compilers:
+#            c: /opt/rocm/llvm/bin/clang++
+#            cxx: /opt/rocm/llvm/bin/clang++
+#      buildable: false
+#
+# 3. In part 2, DO NOT list the path to hsa as /opt/rocm/hsa ! You want spack
+#    to find hsa in /opt/rocm/include/hsa/hsa.h . The directory of
+#    /opt/rocm/hsa also has an hsa.h file, but it won't be found because spack
+#    does not like its directory structure.
+#
+
+from spack.package import PackageBase
+from spack.directives import depends_on, variant, conflicts
+
+
+class HipPackage(PackageBase):
+    """Auxiliary class which contains HIP variant, dependencies and conflicts
+    and is meant to unify and facilitate its usage. Closely mimics CudaPackage.
+
+    Maintainers: dtaller
+    """
+
+    # https://llvm.org/docs/AMDGPUUsage.html
+    # Possible architectures
+    amdgpu_targets = (
+        'gfx701', 'gfx801', 'gfx802', 'gfx803',
+        'gfx900', 'gfx906', 'gfx908', 'gfx1010',
+        'gfx1011', 'gfx1012', 'none'
+    )
+
+    variant('hip', default=False, description='Enable HIP support')
+
+    # possible amd gpu targets for hip builds
+    variant('amdgpu_target', default='none', values=amdgpu_targets)
+
+    depends_on('llvm-amdgpu', when='+hip')
+    depends_on('hsa-rocr-dev', when='+hip')
+    depends_on('hip', when='+hip')
+
+    # need amd gpu type for hip builds
+    conflicts('amdgpu_target=none', when='+hip')
+
+    # Make sure non-'none' amdgpu_targets cannot be used without +hip
+    for value in amdgpu_targets[:-1]:
+        conflicts('~hip', when='amdgpu_target=' + value)
+
+    # https://github.com/ROCm-Developer-Tools/HIP/blob/master/bin/hipcc
+    # It seems that hip-clang does not (yet?) accept this flag, in which case
+    # we will still need to set the HCC_AMDGPU_TARGET environment flag in the
+    # hip package file. But I will leave this here for future development.
+    @staticmethod
+    def hip_flags(amdgpu_target):
+        return '--amdgpu-target={0}'.format(amdgpu_target)
+
+    # https://llvm.org/docs/AMDGPUUsage.html
+    # Possible architectures (not including 'none' option)
+    @staticmethod
+    def amd_gputargets_list():
+        return (
+            'gfx701', 'gfx801', 'gfx802', 'gfx803',
+            'gfx900', 'gfx906', 'gfx908', 'gfx1010',
+            'gfx1011', 'gfx1012'
+        )
+
+    # HIP version vs Architecture
+
+    # TODO: add a bunch of lines like:
+    # depends_on('hip@:6.0', when='amdgpu_target=gfx701')
+    # to indicate minimum version for each architecture.
+
+    # Compiler conflicts
+
+    # TODO: add conflicts statements along the lines of
+    # arch_platform = ' target=x86_64: platform=linux'
+    # conflicts('%gcc@5:', when='+cuda ^cuda@:7.5' + arch_platform)
+    # conflicts('platform=darwin', when='+cuda ^cuda@11.0.2:')
+    # for hip-related limitations.
diff --git a/lib/spack/spack/pkgkit.py b/lib/spack/spack/pkgkit.py
index 4f25d41dfb..da519f2e16 100644
--- a/lib/spack/spack/pkgkit.py
+++ b/lib/spack/spack/pkgkit.py
@@ -20,6 +20,7 @@ from spack.build_systems.aspell_dict import AspellDictPackage
 from spack.build_systems.autotools import AutotoolsPackage
 from spack.build_systems.cmake import CMakePackage
 from spack.build_systems.cuda import CudaPackage
+from spack.build_systems.hip import HipPackage
 from spack.build_systems.qmake import QMakePackage
 from spack.build_systems.maven import MavenPackage
 from spack.build_systems.scons import SConsPackage