CMake/Modules/FindOpenCL.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

150 lines
4.1 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindOpenCL
# ----------
#
# Try to find OpenCL
#
# IMPORTED Targets
# ^^^^^^^^^^^^^^^^
#
# This module defines :prop_tgt:`IMPORTED` target ``OpenCL::OpenCL``, if
# OpenCL has been found.
#
# Result Variables
# ^^^^^^^^^^^^^^^^
#
# This module defines the following variables::
#
# OpenCL_FOUND - True if OpenCL was found
# OpenCL_INCLUDE_DIRS - include directories for OpenCL
# OpenCL_LIBRARIES - link against this library to use OpenCL
# OpenCL_VERSION_STRING - Highest supported OpenCL version (eg. 1.2)
# OpenCL_VERSION_MAJOR - The major version of the OpenCL implementation
# OpenCL_VERSION_MINOR - The minor version of the OpenCL implementation
#
# The module will also define two cache variables::
#
# OpenCL_INCLUDE_DIR - the OpenCL include directory
# OpenCL_LIBRARY - the path to the OpenCL library
#
function(_FIND_OPENCL_VERSION)
include(CheckSymbolExists)
include(CMakePushCheckState)
set(CMAKE_REQUIRED_QUIET ${OpenCL_FIND_QUIETLY})
CMAKE_PUSH_CHECK_STATE()
foreach(VERSION "2_0" "1_2" "1_1" "1_0")
set(CMAKE_REQUIRED_INCLUDES "${OpenCL_INCLUDE_DIR}")
if(APPLE)
CHECK_SYMBOL_EXISTS(
CL_VERSION_${VERSION}
"${OpenCL_INCLUDE_DIR}/Headers/cl.h"
OPENCL_VERSION_${VERSION})
else()
CHECK_SYMBOL_EXISTS(
CL_VERSION_${VERSION}
"${OpenCL_INCLUDE_DIR}/CL/cl.h"
OPENCL_VERSION_${VERSION})
endif()
if(OPENCL_VERSION_${VERSION})
string(REPLACE "_" "." VERSION "${VERSION}")
set(OpenCL_VERSION_STRING ${VERSION} PARENT_SCOPE)
string(REGEX MATCHALL "[0-9]+" version_components "${VERSION}")
list(GET version_components 0 major_version)
list(GET version_components 1 minor_version)
set(OpenCL_VERSION_MAJOR ${major_version} PARENT_SCOPE)
set(OpenCL_VERSION_MINOR ${minor_version} PARENT_SCOPE)
break()
endif()
endforeach()
CMAKE_POP_CHECK_STATE()
endfunction()
find_path(OpenCL_INCLUDE_DIR
NAMES
CL/cl.h OpenCL/cl.h
PATHS
ENV "PROGRAMFILES(X86)"
ENV AMDAPPSDKROOT
ENV INTELOCLSDKROOT
ENV NVSDKCOMPUTE_ROOT
ENV CUDA_PATH
ENV ATISTREAMSDKROOT
PATH_SUFFIXES
include
OpenCL/common/inc
"AMD APP/include")
_FIND_OPENCL_VERSION()
if(WIN32)
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
find_library(OpenCL_LIBRARY
NAMES OpenCL
PATHS
ENV "PROGRAMFILES(X86)"
ENV AMDAPPSDKROOT
ENV INTELOCLSDKROOT
ENV CUDA_PATH
ENV NVSDKCOMPUTE_ROOT
ENV ATISTREAMSDKROOT
PATH_SUFFIXES
"AMD APP/lib/x86"
lib/x86
lib/Win32
OpenCL/common/lib/Win32)
elseif(CMAKE_SIZEOF_VOID_P EQUAL 8)
find_library(OpenCL_LIBRARY
NAMES OpenCL
PATHS
ENV "PROGRAMFILES(X86)"
ENV AMDAPPSDKROOT
ENV INTELOCLSDKROOT
ENV CUDA_PATH
ENV NVSDKCOMPUTE_ROOT
ENV ATISTREAMSDKROOT
PATH_SUFFIXES
"AMD APP/lib/x86_64"
lib/x86_64
lib/x64
OpenCL/common/lib/x64)
endif()
else()
find_library(OpenCL_LIBRARY
NAMES OpenCL)
endif()
set(OpenCL_LIBRARIES ${OpenCL_LIBRARY})
set(OpenCL_INCLUDE_DIRS ${OpenCL_INCLUDE_DIR})
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args(
OpenCL
FOUND_VAR OpenCL_FOUND
REQUIRED_VARS OpenCL_LIBRARY OpenCL_INCLUDE_DIR
VERSION_VAR OpenCL_VERSION_STRING)
mark_as_advanced(
OpenCL_INCLUDE_DIR
OpenCL_LIBRARY)
if(OpenCL_FOUND AND NOT TARGET OpenCL::OpenCL)
if(OpenCL_LIBRARY MATCHES "/([^/]+)\\.framework$")
add_library(OpenCL::OpenCL INTERFACE IMPORTED)
set_target_properties(OpenCL::OpenCL PROPERTIES
INTERFACE_LINK_LIBRARIES "${OpenCL_LIBRARY}")
else()
add_library(OpenCL::OpenCL UNKNOWN IMPORTED)
set_target_properties(OpenCL::OpenCL PROPERTIES
IMPORTED_LOCATION "${OpenCL_LIBRARY}")
endif()
set_target_properties(OpenCL::OpenCL PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${OpenCL_INCLUDE_DIRS}")
endif()