Second Part of Internal API Refactor (#1326)

cmake/Modules/FindRay.cmake

@@ -0,0 +1,77 @@
+# - Find RAY
+# This module defines
+#  RAY_INCLUDE_DIR, directory containing headers
+#  RAY_LIBS, directory containing ray libraries
+#  RAY_STATIC_LIB, path to static library
+#  RAY_SHARED_LIB, path to shared library
+#  RAY_FOUND, whether ray has been found
+
+include(FindPkgConfig)
+
+if ("$ENV{RAY_HOME}" STREQUAL "")
+  pkg_check_modules(RAY ray)
+  if (RAY_FOUND)
+    pkg_get_variable(RAY_ABI_VERSION ray abi_version)
+    message(STATUS "Ray ABI version: ${RAY_ABI_VERSION}")
+    pkg_get_variable(RAY_SO_VERSION ray so_version)
+    message(STATUS "Ray SO version: ${RAY_SO_VERSION}")
+    set(RAY_INCLUDE_DIR ${RAY_INCLUDE_DIRS})
+    set(RAY_LIBS ${RAY_LIBRARY_DIRS})
+    set(RAY_SEARCH_LIB_PATH ${RAY_LIBRARY_DIRS})
+  endif()
+else()
+  set(RAY_HOME "$ENV{RAY_HOME}")
+
+  set(RAY_SEARCH_HEADER_PATHS
+    ${RAY_HOME}/include
+    )
+
+  set(RAY_SEARCH_LIB_PATH
+    ${RAY_HOME}/lib
+    )
+
+  find_path(RAY_INCLUDE_DIR ray/gcs/client.h PATHS
+    ${RAY_SEARCH_HEADER_PATHS}
+    # make sure we don't accidentally pick up a different version
+    NO_DEFAULT_PATH
+    )
+endif()
+
+find_library(RAY_LIB_PATH NAMES ray
+  PATHS
+  ${RAY_SEARCH_LIB_PATH}
+  NO_DEFAULT_PATH)
+get_filename_component(RAY_LIBS ${RAY_LIB_PATH} DIRECTORY)
+
+if (RAY_INCLUDE_DIR AND RAY_LIBS)
+  set(RAY_FOUND TRUE)
+  set(RAY_LIB_NAME ray)
+
+  set(RAY_STATIC_LIB ${RAY_LIBS}/lib${RAY_LIB_NAME}.a)
+
+  set(RAY_SHARED_LIB ${RAY_LIBS}/lib${RAY_LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
+endif()
+
+if (RAY_FOUND)
+  if (NOT Ray_FIND_QUIETLY)
+    message(STATUS "Found the Ray core library: ${RAY_LIB_PATH}")
+  endif ()
+else ()
+  if (NOT Ray_FIND_QUIETLY)
+    set(RAY_ERR_MSG "Could not find the Ray library. Looked for headers")
+    set(RAY_ERR_MSG "${RAY_ERR_MSG} in ${RAY_SEARCH_HEADER_PATHS}, and for libs")
+    set(RAY_ERR_MSG "${RAY_ERR_MSG} in ${RAY_SEARCH_LIB_PATH}")
+    if (Ray_FIND_REQUIRED)
+      message(FATAL_ERROR "${RAY_ERR_MSG}")
+    else (Ray_FIND_REQUIRED)
+      message(STATUS "${RAY_ERR_MSG}")
+    endif (Ray_FIND_REQUIRED)
+  endif ()
+  set(RAY_FOUND FALSE)
+endif ()
+
+mark_as_advanced(
+  RAY_INCLUDE_DIR
+  RAY_STATIC_LIB
+  RAY_SHARED_LIB
+)