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[CMake] Show NVCC include directories in compile_commands.json #17079

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Jun 12, 2024
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[CMake] Show NVCC include directories in compile_commands.json #17079

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20 changes: 20 additions & 0 deletions cmake/modules/CUDA.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,26 @@ if(USE_CUDA)
endif()
message(STATUS "Build with CUDA ${CUDA_VERSION} support")
enable_language(CUDA)

# Ensure that include directives to NVCC are in the
# `compile_commands.json`, as required by clangd.
#
# As of cmake 3.29.5 [0], if the NVCC version is 11 or higher, cmake
# will generate a "options-file.rsp" containing the -I flags for
# include directories, rather than providing them on the
# command-line. This setting exists to work around the short
# command-line length limits on Windows, but is enabled on all
# platforms. If set, because include directories are not part of
# the `compile_commands.json`, the clangd LSP cannot find the
# include files.
#
# Furthermore, this override cannot be specified in a user's
# `config.cmake` for TVM, because it must be set after CMake's
# built-in CUDA support.
#
# [0] https://github.com/Kitware/CMake/commit/6377a438
set(CMAKE_CUDA_USE_RESPONSE_FILE_FOR_INCLUDES 0)

tvm_file_glob(GLOB RUNTIME_CUDA_SRCS src/runtime/cuda/*.cc)
list(APPEND RUNTIME_SRCS ${RUNTIME_CUDA_SRCS})
list(APPEND COMPILER_SRCS src/target/opt/build_cuda_on.cc)
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