CMake: Halide (#1374)

CMakeLists.txt

@@ -222,6 +222,13 @@ else()
 endif()
 include(cmake/external_tbb.cmake)
 
+if (NGRAPH_HALIDE)
+    message(WARNING "Halide build system integration is currently using an older LLVM release \
+                     and is not expected to work across most build environments. Consider \
+                     disabling it till this message goes away")
+    include(cmake/external_halide.cmake)
+endif()
+
 add_subdirectory(src)
 
 if (NGRAPH_UNIT_TEST_ENABLE)

cmake/external_halide.cmake

+# ******************************************************************************
+# Copyright 2018 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ******************************************************************************
+
+include(ExternalProject)
+
+find_package(ZLIB REQUIRED)
+
+set(HALIDE_LLVM_TARBALL_URL https://releases.llvm.org/6.0.1/clang+llvm-6.0.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz)
+set(HALIDE_LLVM_SHA1_HASH c7db0162fbf4cc32193b6a85f84f4abee3d107b9)
+
+ExternalProject_Add(
+    ext_halide_llvm
+    URL ${HALIDE_LLVM_TARBALL_URL}
+    URL_HASH SHA1=${HALIDE_LLVM_SHA1_HASH}
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ""
+    UPDATE_COMMAND ""
+    EXCLUDE_FROM_ALL TRUE
+    )
+
+ExternalProject_Get_Property(ext_halide_llvm SOURCE_DIR)
+
+set(HALIDE_LLVM_DIR "${SOURCE_DIR}/lib/cmake/llvm")
+
+set(HALIDE_GIT_REPO_URL https://github.com/halide/Halide)
+set(HALIDE_GIT_TAG "ea9c863")
+
+ExternalProject_Add(
+    ext_halide
+    DEPENDS ext_halide_llvm
+    GIT_REPOSITORY ${HALIDE_GIT_REPO_URL}
+    GIT_TAG ${HALIDE_GIT_TAG}
+    UPDATE_COMMAND ""
+    CMAKE_ARGS
+    -DLLVM_DIR=${HALIDE_LLVM_DIR}
+    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_INSTALL_PREFIX=${EXTERNAL_PROJECTS_ROOT}/halide
+    TMP_DIR "${EXTERNAL_PROJECTS_ROOT}/halide/tmp"
+    STAMP_DIR "${EXTERNAL_PROJECTS_ROOT}/halide/stamp"
+    DOWNLOAD_DIR "${EXTERNAL_PROJECTS_ROOT}/halide/download"
+    SOURCE_DIR "${EXTERNAL_PROJECTS_ROOT}/halide/src"
+    BINARY_DIR "${EXTERNAL_PROJECTS_ROOT}/halide/build"
+    INSTALL_DIR "${EXTERNAL_PROJECTS_ROOT}/halide"
+    EXCLUDE_FROM_ALL TRUE
+    )