8e40387ce4
Summary: This, as far as I am aware, has mostly been superceded by the runtimes build that's built on top of libc. This build links 30% faster, supports more functionality, and uses 95% less disk space, so it seems to be the direction we want to go. CUDA support remains, this is not needed urgently.
73 lines
2.6 KiB
CMake
73 lines
2.6 KiB
CMake
#===-- cmake/modules/AddFlangRTOffload.cmake -------------------------------===#
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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#===------------------------------------------------------------------------===#
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macro(enable_cuda_compilation name files)
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if (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT STREQUAL "CUDA")
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if (FLANG_RT_ENABLE_SHARED)
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message(FATAL_ERROR
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"FLANG_RT_ENABLE_SHARED is not supported for CUDA offload build of Flang-RT"
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)
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endif()
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enable_language(CUDA)
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set_target_properties(${name}.static
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PROPERTIES
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CUDA_SEPARABLE_COMPILATION ON
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)
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# Treat all supported sources as CUDA files.
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set_source_files_properties(${files} PROPERTIES LANGUAGE CUDA)
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set(CUDA_COMPILE_OPTIONS)
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if ("${CMAKE_CUDA_COMPILER_ID}" MATCHES "Clang")
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# Allow varargs.
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set(CUDA_COMPILE_OPTIONS
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-Xclang -fcuda-allow-variadic-functions
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)
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endif()
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if ("${CMAKE_CUDA_COMPILER_ID}" MATCHES "NVIDIA")
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set(CUDA_COMPILE_OPTIONS
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--expt-relaxed-constexpr
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# Disable these warnings:
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# 'long double' is treated as 'double' in device code
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-Xcudafe --diag_suppress=20208
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-Xcudafe --display_error_number
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)
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endif()
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set_source_files_properties(${files} PROPERTIES COMPILE_OPTIONS
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"${CUDA_COMPILE_OPTIONS}")
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# Create a .a library consisting of CUDA PTX.
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# This is different from a regular static library. The CUDA_PTX_COMPILATION
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# property can only be applied to object libraries and create *.ptx files
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# instead of *.o files. The .a will consist of those *.ptx files only.
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add_flangrt_library(obj.${name}PTX OBJECT ${files})
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set_target_properties(obj.${name}PTX PROPERTIES
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CUDA_PTX_COMPILATION ON
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CUDA_SEPARABLE_COMPILATION ON
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)
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add_flangrt_library(${name}PTX STATIC "$<TARGET_OBJECTS:obj.${name}PTX>")
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# Apply configuration options
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if (FLANG_RT_CUDA_RUNTIME_PTX_WITHOUT_GLOBAL_VARS)
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target_compile_definitions(obj.${name}PTX
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PRIVATE FLANG_RUNTIME_NO_GLOBAL_VAR_DEFS
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)
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endif()
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# When using libcudacxx headers files, we have to use them
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# for all files of Flang-RT.
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if (EXISTS "${FLANG_RT_LIBCUDACXX_PATH}/include")
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foreach (tgt IN ITEMS "${name}.static" "obj.${name}PTX")
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target_include_directories(${tgt} AFTER PRIVATE "${FLANG_RT_LIBCUDACXX_PATH}/include")
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target_compile_definitions(${tgt} PRIVATE RT_USE_LIBCUDACXX=1)
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endforeach ()
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endif ()
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endif()
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endmacro()
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