1010#
1111##===----------------------------------------------------------------------===##
1212
13- if ("${CMAKE_SOURCE_DIR} " STREQUAL "${CMAKE_CURRENT_SOURCE_DIR} " )
14- message (FATAL_ERROR "Direct configuration not supported, please use parent directory!" )
13+ cmake_minimum_required (VERSION 3.20.0)
14+
15+ if ("${CMAKE_SOURCE_DIR} " STREQUAL "${CMAKE_CURRENT_SOURCE_DIR} " )
16+ set (OPENMP_STANDALONE_BUILD TRUE )
17+ project (offload C CXX ASM)
18+ endif ()
19+
20+ set (ENABLE_LIBOMPTARGET ON )
21+ # Currently libomptarget cannot be compiled on Windows or MacOS X.
22+ # Since the device plugins are only supported on Linux anyway,
23+ # there is no point in trying to compile libomptarget on other OSes.
24+ # 32-bit systems are not supported either.
25+ if (APPLE OR WIN32 OR NOT "cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
26+ set (ENABLE_LIBOMPTARGET OFF )
1527endif ()
1628
17- # Add cmake directory to search for custom cmake functions.
18- set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR} /cmake/Modules ${CMAKE_MODULE_PATH} )
29+ option (OPENMP_ENABLE_LIBOMPTARGET "Enable building libomptarget for offloading."
30+ ${ENABLE_LIBOMPTARGET} )
31+ if (OPENMP_ENABLE_LIBOMPTARGET)
32+ # Check that the library can actually be built.
33+ if (APPLE OR WIN32 )
34+ message (FATAL_ERROR "libomptarget cannot be built on Windows and MacOS X!" )
35+ elseif (NOT "cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
36+ message (FATAL_ERROR "Host compiler must support C++17 to build libomptarget!" )
37+ elseif (NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
38+ message (FATAL_ERROR "libomptarget on 32-bit systems are not supported!" )
39+ endif ()
40+ endif ()
41+
42+ # TODO: Leftover from the move, could probably be just LLVM_LIBDIR_SUFFIX everywhere.
43+ set (OFFLOAD_INSTALL_LIBDIR "lib${LLVM_LIBDIR_SUFFIX} " )
44+
45+ set (LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR} /../cmake)
46+
47+ # Add path for custom modules
48+ list (INSERT CMAKE_MODULE_PATH 0
49+ "${CMAKE_CURRENT_SOURCE_DIR} /cmake"
50+ "${CMAKE_CURRENT_SOURCE_DIR} /cmake/Modules"
51+ "${LLVM_COMMON_CMAKE_UTILS} /Modules"
52+ )
53+
54+ if (OPENMP_STANDALONE_BUILD)
55+ # CMAKE_BUILD_TYPE was not set, default to Release.
56+ if (NOT CMAKE_BUILD_TYPE )
57+ set (CMAKE_BUILD_TYPE Release)
58+ endif ()
59+
60+ # Group common settings.
61+ set (OPENMP_ENABLE_WERROR FALSE CACHE BOOL
62+ "Enable -Werror flags to turn warnings into errors for supporting compilers." )
63+ set (OPENMP_LIBDIR_SUFFIX "" CACHE STRING
64+ "Suffix of lib installation directory, e.g. 64 => lib64" )
65+ # Do not use OPENMP_LIBDIR_SUFFIX directly, use OPENMP_INSTALL_LIBDIR.
66+ set (OPENMP_INSTALL_LIBDIR "lib${OPENMP_LIBDIR_SUFFIX} " )
67+
68+ # Group test settings.
69+ set (OPENMP_TEST_C_COMPILER ${CMAKE_C_COMPILER} CACHE STRING
70+ "C compiler to use for testing OpenMP runtime libraries." )
71+ set (OPENMP_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE STRING
72+ "C++ compiler to use for testing OpenMP runtime libraries." )
73+ set (OPENMP_TEST_Fortran_COMPILER ${CMAKE_Fortran_COMPILER} CACHE STRING
74+ "FORTRAN compiler to use for testing OpenMP runtime libraries." )
75+ set (OPENMP_LLVM_TOOLS_DIR "" CACHE PATH "Path to LLVM tools for testing." )
76+
77+ set (CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to" )
78+ set (CMAKE_CXX_STANDARD_REQUIRED NO )
79+ set (CMAKE_CXX_EXTENSIONS NO )
80+ else ()
81+ set (OPENMP_ENABLE_WERROR ${LLVM_ENABLE_WERROR} )
82+ # If building in tree, we honor the same install suffix LLVM uses.
83+ set (OPENMP_INSTALL_LIBDIR "lib${LLVM_LIBDIR_SUFFIX} " )
84+
85+ if (NOT MSVC )
86+ set (OPENMP_TEST_C_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /clang)
87+ set (OPENMP_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /clang++)
88+ else ()
89+ set (OPENMP_TEST_C_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /clang.exe)
90+ set (OPENMP_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /clang++.exe)
91+ endif ()
92+
93+ # Check for flang
94+ if (NOT MSVC )
95+ set (OPENMP_TEST_Fortran_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /flang-new)
96+ else ()
97+ set (OPENMP_TEST_Fortran_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR} /flang-new.exe)
98+ endif ()
99+
100+ # Set fortran test compiler if flang is found
101+ if (EXISTS "${OPENMP_TEST_Fortran_COMPILER} " )
102+ message ("Using local flang build at ${OPENMP_TEST_Fortran_COMPILER} " )
103+ else ()
104+ unset (OPENMP_TEST_Fortran_COMPILER)
105+ endif ()
106+
107+ # If not standalone, set CMAKE_CXX_STANDARD but don't set the global cache value,
108+ # only set it locally for OpenMP.
109+ set (CMAKE_CXX_STANDARD 17)
110+ set (CMAKE_CXX_STANDARD_REQUIRED NO )
111+ set (CMAKE_CXX_EXTENSIONS NO )
112+ endif ()
19113
20114# Set the path of all resulting libraries to a unified location so that it can
21115# be used for testing.
@@ -36,6 +130,9 @@ include(LibomptargetUtils)
36130# Get dependencies for the different components of the project.
37131include (LibomptargetGetDependencies)
38132
133+ # Set up testing infrastructure.
134+ include (OpenMPTesting)
135+
39136# LLVM source tree is required at build time for libomptarget
40137if (NOT LIBOMPTARGET_LLVM_INCLUDE_DIRS)
41138 message (FATAL_ERROR "Missing definition for LIBOMPTARGET_LLVM_INCLUDE_DIRS" )
@@ -101,6 +198,58 @@ if (LIBOMPTARGET_USE_LTO)
101198 list (APPEND offload_link_flags ${CMAKE_CXX_COMPILE_OPTIONS_IPO} )
102199endif ()
103200
201+ if (OPENMP_STANDALONE_BUILD)
202+ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
203+ execute_process (
204+ OUTPUT_STRIP_TRAILING_WHITESPACE
205+ COMMAND ${CMAKE_CXX_COMPILER} --print-resource -dir
206+ RESULT_VARIABLE COMMAND_RETURN_CODE
207+ OUTPUT_VARIABLE COMPILER_RESOURCE_DIR
208+ )
209+ endif ()
210+
211+ set (LIBOMP_HAVE_OMPT_SUPPORT FALSE )
212+ set (LIBOMP_OMPT_SUPPORT FALSE )
213+
214+ find_path (
215+ LIBOMP_OMP_TOOLS_INCLUDE_DIR
216+ NAMES
217+ omp-tools.h
218+ HINTS
219+ ${COMPILER_RESOURCE_DIR} /include
220+ ${CMAKE_INSTALL_PREFIX} /include
221+ )
222+
223+ if (LIBOMP_OMP_TOOLS_INCLUDE_DIR)
224+ set (LIBOMP_HAVE_OMPT_SUPPORT TRUE )
225+ set (LIBOMP_OMPT_SUPPORT TRUE )
226+ endif ()
227+
228+ # LLVM_LIBRARY_DIRS set by find_package(LLVM) in LibomptargetGetDependencies
229+ find_library (
230+ LIBOMP_STANDALONE
231+ NAMES
232+ omp
233+ HINTS
234+ ${CMAKE_INSTALL_PREFIX} /lib
235+ ${LLVM_LIBRARY_DIRS}
236+ REQUIRED
237+ )
238+ # Check LIBOMP_HAVE_VERSION_SCRIPT_FLAG
239+ include (LLVMCheckCompilerLinkerFlag)
240+ if (NOT APPLE )
241+ llvm_check_compiler_linker_flag(C "-Wl,--version-script=${CMAKE_CURRENT_LIST_DIR} /../openmp/runtime/src/exports_test_so.txt" LIBOMP_HAVE_VERSION_SCRIPT_FLAG)
242+ endif ()
243+
244+ macro (pythonize_bool var)
245+ if (${var} )
246+ set (${var} True )
247+ else ()
248+ set (${var} False )
249+ endif ()
250+ endmacro ()
251+ endif ()
252+
104253# OMPT support for libomptarget
105254# Follow host OMPT support and check if host support has been requested.
106255# LIBOMP_HAVE_OMPT_SUPPORT indicates whether host OMPT support has been implemented.
@@ -127,13 +276,10 @@ pythonize_bool(LIBOMPTARGET_GPU_LIBC_SUPPORT)
127276
128277set (LIBOMPTARGET_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} /include )
129278message (STATUS "OpenMP tools dir in libomptarget: ${LIBOMP_OMP_TOOLS_INCLUDE_DIR} " )
130- include_directories (${LIBOMP_OMP_TOOLS_INCLUDE_DIR} )
279+ if (LIBOMP_OMP_TOOLS_INCLUDE_DIR)
280+ include_directories (${LIBOMP_OMP_TOOLS_INCLUDE_DIR} )
281+ endif ()
131282
132- # Definitions for testing, for reuse when testing libomptarget-nvptx.
133- set (LIBOMPTARGET_OPENMP_HEADER_FOLDER "${LIBOMP_INCLUDE_DIR} " CACHE STRING
134- "Path to folder containing omp.h" )
135- set (LIBOMPTARGET_OPENMP_HOST_RTL_FOLDER "${LIBOMP_LIBRARY_DIR} " CACHE STRING
136- "Path to folder containing libomp.so, and libLLVMSupport.so with profiling enabled" )
137283set (LIBOMPTARGET_LLVM_LIBRARY_DIR "${LLVM_LIBRARY_DIR} " CACHE STRING
138284 "Path to folder containing llvm library libomptarget.so" )
139285set (LIBOMPTARGET_LLVM_LIBRARY_INTDIR "${LIBOMPTARGET_INTDIR} " CACHE STRING
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