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36ac095ff8918bf7c208029bf6ad28418f1620c1
pytorch/cmake/public/utils.cmake
Nikita Shulga 36ac095ff8 Migrate PyTorch to C++17 (#85969) 
With CUDA-10.2 gone we can finally do it!

This PR mostly contains build system related changes, invasive functional ones are to be followed.
Among many expected tweaks to the build system, here are few unexpected ones:
 - Force onnx_proto project to be updated to C++17 to avoid `duplicate symbols` error when compiled by gcc-7.5.0, as storage rule for `constexpr` changed in C++17, but gcc does not seem to follow it
 - Do not use `std::apply` on CUDA but rely on the built-in variant, as it results in test failures when CUDA runtime picks host rather than device function when `std::apply` is invoked from CUDA code.
 - `std::decay_t` -> `::std::decay_t` and `std::move`->`::std::move` as VC++ for some reason claims that `std` symbol is ambigious
 - Disable use of `std::aligned_alloc` on Android, as its `libc++` does not implement it.

Some prerequisites:
 - https://github.com/pytorch/pytorch/pull/89297
 - https://github.com/pytorch/pytorch/pull/89605
 - https://github.com/pytorch/pytorch/pull/90228
 - https://github.com/pytorch/pytorch/pull/90389
 - https://github.com/pytorch/pytorch/pull/90379
 - https://github.com/pytorch/pytorch/pull/89570
 - https://github.com/facebookincubator/gloo/pull/336
 - https://github.com/facebookincubator/gloo/pull/343
 - 919676fb32

Fixes https://github.com/pytorch/pytorch/issues/56055

Pull Request resolved: https://github.com/pytorch/pytorch/pull/85969
Approved by: https://github.com/ezyang, https://github.com/kulinseth
2022-12-08 02:27:48 +00:00

593 lines
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CMake
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################################################################################################
# Exclude and prepend functionalities
function(exclude OUTPUT INPUT)
set(EXCLUDES ${ARGN})
foreach(EXCLUDE ${EXCLUDES})
list(REMOVE_ITEM INPUT "${EXCLUDE}")
endforeach()
set(${OUTPUT} ${INPUT} PARENT_SCOPE)
endfunction(exclude)
function(prepend OUTPUT PREPEND)
set(OUT "")
foreach(ITEM ${ARGN})
list(APPEND OUT "${PREPEND}${ITEM}")
endforeach()
set(${OUTPUT} ${OUT} PARENT_SCOPE)
endfunction(prepend)
################################################################################################
# Clears variables from list
# Usage:
# caffe_clear_vars(<variables_list>)
macro(caffe_clear_vars)
foreach(_var ${ARGN})
unset(${_var})
endforeach()
endmacro()
################################################################################################
# Prints list element per line
# Usage:
# caffe_print_list(<list>)
function(caffe_print_list)
foreach(e ${ARGN})
message(STATUS ${e})
endforeach()
endfunction()
################################################################################################
# Reads set of version defines from the header file
# Usage:
# caffe_parse_header(<file> <define1> <define2> <define3> ..)
macro(caffe_parse_header FILENAME FILE_VAR)
set(vars_regex "")
set(__parnet_scope OFF)
set(__add_cache OFF)
foreach(name ${ARGN})
if("${name}" STREQUAL "PARENT_SCOPE")
set(__parnet_scope ON)
elseif("${name}" STREQUAL "CACHE")
set(__add_cache ON)
elseif(vars_regex)
set(vars_regex "${vars_regex}|${name}")
else()
set(vars_regex "${name}")
endif()
endforeach()
if(EXISTS "${FILENAME}")
file(STRINGS "${FILENAME}" ${FILE_VAR} REGEX "#define[ \t]+(${vars_regex})[ \t]+[0-9]+" )
else()
unset(${FILE_VAR})
endif()
foreach(name ${ARGN})
if(NOT "${name}" STREQUAL "PARENT_SCOPE" AND NOT "${name}" STREQUAL "CACHE")
if(${FILE_VAR})
if(${FILE_VAR} MATCHES ".+[ \t]${name}[ \t]+([0-9]+).*")
string(REGEX REPLACE ".+[ \t]${name}[ \t]+([0-9]+).*" "\\1" ${name} "${${FILE_VAR}}")
else()
set(${name} "")
endif()
if(__add_cache)
set(${name} ${${name}} CACHE INTERNAL "${name} parsed from ${FILENAME}" FORCE)
elseif(__parnet_scope)
set(${name} "${${name}}" PARENT_SCOPE)
endif()
else()
unset(${name} CACHE)
endif()
endif()
endforeach()
endmacro()
################################################################################################
# Parses a version string that might have values beyond major, minor, and patch
# and set version variables for the library.
# Usage:
# caffe2_parse_version_str(<library_name> <version_string>)
function(caffe2_parse_version_str LIBNAME VERSIONSTR)
string(REGEX REPLACE "^([0-9]+).*$" "\\1" ${LIBNAME}_VERSION_MAJOR "${VERSIONSTR}")
string(REGEX REPLACE "^[0-9]+\\.([0-9]+).*$" "\\1" ${LIBNAME}_VERSION_MINOR "${VERSIONSTR}")
string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" ${LIBNAME}_VERSION_PATCH "${VERSIONSTR}")
set(${LIBNAME}_VERSION_MAJOR ${${LIBNAME}_VERSION_MAJOR} ${ARGN} PARENT_SCOPE)
set(${LIBNAME}_VERSION_MINOR ${${LIBNAME}_VERSION_MINOR} ${ARGN} PARENT_SCOPE)
set(${LIBNAME}_VERSION_PATCH ${${LIBNAME}_VERSION_PATCH} ${ARGN} PARENT_SCOPE)
set(${LIBNAME}_VERSION "${${LIBNAME}_VERSION_MAJOR}.${${LIBNAME}_VERSION_MINOR}.${${LIBNAME}_VERSION_PATCH}" PARENT_SCOPE)
endfunction()
###
# Removes common indentation from a block of text to produce code suitable for
# setting to `python -c`, or using with pycmd. This allows multiline code to be
# nested nicely in the surrounding code structure.
#
# This function respsects PYTHON_EXECUTABLE if it defined, otherwise it uses
# `python` and hopes for the best. An error will be thrown if it is not found.
#
# Args:
# outvar : variable that will hold the stdout of the python command
# text : text to remove indentation from
#
function(dedent outvar text)
# Use PYTHON_EXECUTABLE if it is defined, otherwise default to python
if("${PYTHON_EXECUTABLE}" STREQUAL "")
set(_python_exe "python")
else()
set(_python_exe "${PYTHON_EXECUTABLE}")
endif()
set(_fixup_cmd "import sys; from textwrap import dedent; print(dedent(sys.stdin.read()))")
file(WRITE "${CMAKE_BINARY_DIR}/indented.txt" "${text}")
execute_process(
COMMAND "${_python_exe}" -c "${_fixup_cmd}"
INPUT_FILE "${CMAKE_BINARY_DIR}/indented.txt"
RESULT_VARIABLE _dedent_exitcode
OUTPUT_VARIABLE _dedent_text)
if(NOT _dedent_exitcode EQUAL 0)
message(ERROR " Failed to remove indentation from: \n\"\"\"\n${text}\n\"\"\"
Python dedent failed with error code: ${_dedent_exitcode}")
message(FATAL_ERROR " Python dedent failed with error code: ${_dedent_exitcode}")
endif()
# Remove supurflous newlines (artifacts of print)
string(STRIP "${_dedent_text}" _dedent_text)
set(${outvar} "${_dedent_text}" PARENT_SCOPE)
endfunction()
function(pycmd_no_exit outvar exitcode cmd)
# Use PYTHON_EXECUTABLE if it is defined, otherwise default to python
if("${PYTHON_EXECUTABLE}" STREQUAL "")
set(_python_exe "python")
else()
set(_python_exe "${PYTHON_EXECUTABLE}")
endif()
# run the actual command
execute_process(
COMMAND "${_python_exe}" -c "${cmd}"
RESULT_VARIABLE _exitcode
OUTPUT_VARIABLE _output)
# Remove supurflous newlines (artifacts of print)
string(STRIP "${_output}" _output)
set(${outvar} "${_output}" PARENT_SCOPE)
set(${exitcode} "${_exitcode}" PARENT_SCOPE)
endfunction()
###
# Helper function to run `python -c "<cmd>"` and capture the results of stdout
#
# Runs a python command and populates an outvar with the result of stdout.
# Common indentation in the text of `cmd` is removed before the command is
# executed, so the caller does not need to worry about indentation issues.
#
# This function respsects PYTHON_EXECUTABLE if it defined, otherwise it uses
# `python` and hopes for the best. An error will be thrown if it is not found.
#
# Args:
# outvar : variable that will hold the stdout of the python command
# cmd : text representing a (possibly multiline) block of python code
#
function(pycmd outvar cmd)
dedent(_dedent_cmd "${cmd}")
pycmd_no_exit(_output _exitcode "${_dedent_cmd}")
if(NOT _exitcode EQUAL 0)
message(ERROR " Failed when running python code: \"\"\"\n${_dedent_cmd}\n\"\"\"")
message(FATAL_ERROR " Python command failed with error code: ${_exitcode}")
endif()
# Remove supurflous newlines (artifacts of print)
string(STRIP "${_output}" _output)
set(${outvar} "${_output}" PARENT_SCOPE)
endfunction()
##############################################################################
# Macro to update cached options.
macro(caffe2_update_option variable value)
if(CAFFE2_CMAKE_BUILDING_WITH_MAIN_REPO)
get_property(__help_string CACHE ${variable} PROPERTY HELPSTRING)
set(${variable} ${value} CACHE BOOL ${__help_string} FORCE)
else()
set(${variable} ${value})
endif()
endmacro()
##############################################################################
# Add an interface library definition that is dependent on the source.
#
# It's probably easiest to explain why this macro exists, by describing
# what things would look like if we didn't have this macro.
#
# Let's suppose we want to statically link against torch. We've defined
# a library in cmake called torch, and we might think that we just
# target_link_libraries(my-app PUBLIC torch). This will result in a
# linker argument 'libtorch.a' getting passed to the linker.
#
# Unfortunately, this link command is wrong! We have static
# initializers in libtorch.a that would get improperly pruned by
# the default link settings. What we actually need is for you
# to do -Wl,--whole-archive,libtorch.a -Wl,--no-whole-archive to ensure
# that we keep all symbols, even if they are (seemingly) not used.
#
# What caffe2_interface_library does is create an interface library
# that indirectly depends on the real library, but sets up the link
# arguments so that you get all of the extra link settings you need.
# The result is not a "real" library, and so we have to manually
# copy over necessary properties from the original target.
#
# (The discussion above is about static libraries, but a similar
# situation occurs for dynamic libraries: if no symbols are used from
# a dynamic library, it will be pruned unless you are --no-as-needed)
macro(caffe2_interface_library SRC DST)
add_library(${DST} INTERFACE)
add_dependencies(${DST} ${SRC})
# Depending on the nature of the source library as well as the compiler,
# determine the needed compilation flags.
get_target_property(__src_target_type ${SRC} TYPE)
# Depending on the type of the source library, we will set up the
# link command for the specific SRC library.
if(${__src_target_type} STREQUAL "STATIC_LIBRARY")
# In the case of static library, we will need to add whole-static flags.
if(APPLE)
target_link_libraries(
${DST} INTERFACE -Wl,-force_load,\"$<TARGET_FILE:${SRC}>\")
elseif(MSVC)
# In MSVC, we will add whole archive in default.
target_link_libraries(
${DST} INTERFACE "$<TARGET_FILE:${SRC}>")
target_link_options(
${DST} INTERFACE "-WHOLEARCHIVE:$<TARGET_FILE:${SRC}>")
else()
# Assume everything else is like gcc
target_link_libraries(${DST} INTERFACE
"-Wl,--whole-archive,\"$<TARGET_FILE:${SRC}>\" -Wl,--no-whole-archive")
endif()
# Link all interface link libraries of the src target as well.
# For static library, we need to explicitly depend on all the libraries
# that are the dependent library of the source library. Note that we cannot
# use the populated INTERFACE_LINK_LIBRARIES property, because if one of the
# dependent library is not a target, cmake creates a $<LINK_ONLY:src> wrapper
# and then one is not able to find target "src". For more discussions, check
# https://gitlab.kitware.com/cmake/cmake/issues/15415
# https://cmake.org/pipermail/cmake-developers/2013-May/019019.html
# Specifically the following quote
#
# """
# For STATIC libraries we can define that the PUBLIC/PRIVATE/INTERFACE keys
# are ignored for linking and that it always populates both LINK_LIBRARIES
# LINK_INTERFACE_LIBRARIES. Note that for STATIC libraries the
# LINK_LIBRARIES property will not be used for anything except build-order
# dependencies.
# """
target_link_libraries(${DST} INTERFACE
$<TARGET_PROPERTY:${SRC},LINK_LIBRARIES>)
elseif(${__src_target_type} STREQUAL "SHARED_LIBRARY")
if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
target_link_libraries(${DST} INTERFACE
"-Wl,--no-as-needed,\"$<TARGET_FILE:${SRC}>\" -Wl,--as-needed")
else()
target_link_libraries(${DST} INTERFACE ${SRC})
endif()
# Link all interface link libraries of the src target as well.
# For shared libraries, we can simply depend on the INTERFACE_LINK_LIBRARIES
# property of the target.
target_link_libraries(${DST} INTERFACE
$<TARGET_PROPERTY:${SRC},INTERFACE_LINK_LIBRARIES>)
else()
message(FATAL_ERROR
"You made a CMake build file error: target " ${SRC}
" must be of type either STATIC_LIBRARY or SHARED_LIBRARY. However, "
"I got " ${__src_target_type} ".")
endif()
# For all other interface properties, manually inherit from the source target.
set_target_properties(${DST} PROPERTIES
INTERFACE_COMPILE_DEFINITIONS
$<TARGET_PROPERTY:${SRC},INTERFACE_COMPILE_DEFINITIONS>
INTERFACE_COMPILE_OPTIONS
$<TARGET_PROPERTY:${SRC},INTERFACE_COMPILE_OPTIONS>
INTERFACE_INCLUDE_DIRECTORIES
$<TARGET_PROPERTY:${SRC},INTERFACE_INCLUDE_DIRECTORIES>
INTERFACE_SYSTEM_INCLUDE_DIRECTORIES
$<TARGET_PROPERTY:${SRC},INTERFACE_SYSTEM_INCLUDE_DIRECTORIES>)
endmacro()
##############################################################################
# Creating a Caffe2 binary target with sources specified with relative path.
# Usage:
# caffe2_binary_target(target_name_or_src <src1> [<src2>] [<src3>] ...)
# If only target_name_or_src is specified, this target is build with one single
# source file and the target name is autogen from the filename. Otherwise, the
# target name is given by the first argument and the rest are the source files
# to build the target.
function(caffe2_binary_target target_name_or_src)
# https://cmake.org/cmake/help/latest/command/function.html
# Checking that ARGC is greater than # is the only way to ensure
# that ARGV# was passed to the function as an extra argument.
if(ARGC GREATER 1)
set(__target ${target_name_or_src})
prepend(__srcs "${CMAKE_CURRENT_SOURCE_DIR}/" "${ARGN}")
else()
get_filename_component(__target ${target_name_or_src} NAME_WE)
prepend(__srcs "${CMAKE_CURRENT_SOURCE_DIR}/" "${target_name_or_src}")
endif()
add_executable(${__target} ${__srcs})
target_link_libraries(${__target} torch_library)
# If we have Caffe2_MODULES defined, we will also link with the modules.
if(DEFINED Caffe2_MODULES)
target_link_libraries(${__target} ${Caffe2_MODULES})
endif()
if(USE_TBB AND NOT USE_SYSTEM_TBB)
target_include_directories(${__target} PUBLIC ${TBB_INCLUDE_DIR})
endif()
install(TARGETS ${__target} DESTINATION bin)
endfunction()
function(caffe2_hip_binary_target target_name_or_src)
if(ARGC GREATER 1)
set(__target ${target_name_or_src})
prepend(__srcs "${CMAKE_CURRENT_SOURCE_DIR}/" "${ARGN}")
else()
get_filename_component(__target ${target_name_or_src} NAME_WE)
prepend(__srcs "${CMAKE_CURRENT_SOURCE_DIR}/" "${target_name_or_src}")
endif()
caffe2_binary_target(${target_name_or_src})
target_compile_options(${__target} PRIVATE ${HIP_CXX_FLAGS})
target_include_directories(${__target} PRIVATE ${Caffe2_HIP_INCLUDE})
endfunction()
##############################################################################
# Multiplex between adding libraries for CUDA versus HIP (AMD Software Stack).
# Usage:
# torch_cuda_based_add_library(cuda_target)
#
macro(torch_cuda_based_add_library cuda_target)
if(USE_ROCM)
hip_add_library(${cuda_target} ${ARGN})
elseif(USE_CUDA)
add_library(${cuda_target} ${ARGN})
else()
endif()
endmacro()
##############################################################################
# Get the HIP arch flags specified by PYTORCH_ROCM_ARCH.
# Usage:
# torch_hip_get_arch_list(variable_to_store_flags)
#
macro(torch_hip_get_arch_list store_var)
if(DEFINED ENV{PYTORCH_ROCM_ARCH})
set(_TMP $ENV{PYTORCH_ROCM_ARCH})
else()
# Use arch of installed GPUs as default
execute_process(COMMAND "rocm_agent_enumerator" COMMAND bash "-c" "grep -v gfx000 | sort -u | xargs | tr -d '\n'"
RESULT_VARIABLE ROCM_AGENT_ENUMERATOR_RESULT
OUTPUT_VARIABLE ROCM_ARCH_INSTALLED)
if(NOT ROCM_AGENT_ENUMERATOR_RESULT EQUAL 0)
message(FATAL_ERROR " Could not detect ROCm arch for GPUs on machine. Result: '${ROCM_AGENT_ENUMERATOR_RESULT}'")
endif()
set(_TMP ${ROCM_ARCH_INSTALLED})
endif()
string(REPLACE " " ";" ${store_var} "${_TMP}")
endmacro()
##############################################################################
# Get the NVCC arch flags specified by TORCH_CUDA_ARCH_LIST and CUDA_ARCH_NAME.
# Usage:
# torch_cuda_get_nvcc_gencode_flag(variable_to_store_flags)
#
macro(torch_cuda_get_nvcc_gencode_flag store_var)
# setting nvcc arch flags
if((NOT EXISTS ${TORCH_CUDA_ARCH_LIST}) AND (DEFINED ENV{TORCH_CUDA_ARCH_LIST}))
message(WARNING
"In the future we will require one to explicitly pass "
"TORCH_CUDA_ARCH_LIST to cmake instead of implicitly setting it as an "
"env variable. This will become a FATAL_ERROR in future version of "
"pytorch.")
set(TORCH_CUDA_ARCH_LIST $ENV{TORCH_CUDA_ARCH_LIST})
endif()
if(EXISTS ${CUDA_ARCH_NAME})
message(WARNING
"CUDA_ARCH_NAME is no longer used. Use TORCH_CUDA_ARCH_LIST instead. "
"Right now, CUDA_ARCH_NAME is ${CUDA_ARCH_NAME} and "
"TORCH_CUDA_ARCH_LIST is ${TORCH_CUDA_ARCH_LIST}.")
set(TORCH_CUDA_ARCH_LIST TORCH_CUDA_ARCH_LIST ${CUDA_ARCH_NAME})
endif()
# Invoke cuda_select_nvcc_arch_flags from proper cmake FindCUDA.
cuda_select_nvcc_arch_flags(${store_var} ${TORCH_CUDA_ARCH_LIST})
endmacro()
##############################################################################
# Add standard compile options.
# Usage:
# torch_compile_options(lib_name)
function(torch_compile_options libname)
set_property(TARGET ${libname} PROPERTY CXX_STANDARD 17)
set(private_compile_options "")
# ---[ Check if warnings should be errors.
if(WERROR)
list(APPEND private_compile_options -Werror)
endif()
# until they can be unified, keep these lists synced with setup.py
if(MSVC)
if(MSVC_Z7_OVERRIDE)
set(MSVC_DEBINFO_OPTION "/Z7")
else()
set(MSVC_DEBINFO_OPTION "/Zi")
endif()
target_compile_options(${libname} PUBLIC
$<$<COMPILE_LANGUAGE:CXX>:
${MSVC_RUNTIME_LIBRARY_OPTION}
$<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:${MSVC_DEBINFO_OPTION}>
/EHsc
/DNOMINMAX
/wd4267
/wd4251
/wd4522
/wd4522
/wd4838
/wd4305
/wd4244
/wd4190
/wd4101
/wd4996
/wd4275
/bigobj>
)
else()
list(APPEND private_compile_options
-Wall
-Wextra
-Wno-unused-parameter
-Wno-unused-function
-Wno-unused-result
-Wno-missing-field-initializers
-Wno-write-strings
-Wno-unknown-pragmas
-Wno-type-limits
-Wno-array-bounds
-Wno-unknown-pragmas
-Wno-sign-compare
-Wno-strict-overflow
-Wno-strict-aliasing
-Wno-error=deprecated-declarations
# Clang has an unfixed bug leading to spurious missing braces
# warnings, see https://bugs.llvm.org/show_bug.cgi?id=21629
-Wno-missing-braces
)
if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
list(APPEND private_compile_options
-Wno-range-loop-analysis)
else()
list(APPEND private_compile_options
# Considered to be flaky. See the discussion at
# https://github.com/pytorch/pytorch/pull/9608
-Wno-maybe-uninitialized)
endif()
endif()
if(MSVC)
elseif(WERROR)
list(APPEND private_compile_options -Wno-strict-overflow)
endif()
target_compile_options(${libname} PRIVATE
$<$<COMPILE_LANGUAGE:CXX>:${private_compile_options}>)
if(USE_CUDA)
string(FIND "${private_compile_options}" " " space_position)
if(NOT space_position EQUAL -1)
message(FATAL_ERROR "Found spaces in private_compile_options='${private_compile_options}'")
endif()
# Convert CMake list to comma-separated list
string(REPLACE ";" "," private_compile_options "${private_compile_options}")
target_compile_options(${libname} PRIVATE
$<$<COMPILE_LANGUAGE:CUDA>:-Xcompiler=${private_compile_options}>)
endif()
if(NOT WIN32 AND NOT USE_ASAN)
# Enable hidden visibility by default to make it easier to debug issues with
# TORCH_API annotations. Hidden visibility with selective default visibility
# behaves close enough to Windows' dllimport/dllexport.
#
# Unfortunately, hidden visibility messes up some ubsan warnings because
# templated classes crossing library boundary get duplicated (but identical)
# definitions. It's easier to just disable it.
target_compile_options(${libname} PRIVATE
$<$<COMPILE_LANGUAGE:CXX>: -fvisibility=hidden>)
endif()
# Use -O2 for release builds (-O3 doesn't improve perf, and -Os results in perf regression)
target_compile_options(${libname} PRIVATE
$<$<AND:$<COMPILE_LANGUAGE:CXX>,$<OR:$<CONFIG:Release>,$<CONFIG:RelWithDebInfo>>>:-O2>)
endfunction()
##############################################################################
# Set standard target properties.
# Usage:
# torch_set_target_props(lib_name)
function(torch_set_target_props libname)
if(MSVC AND AT_MKL_MT)
set(VCOMP_LIB "vcomp")
set_target_properties(${libname} PROPERTIES LINK_FLAGS_MINSIZEREL "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES LINK_FLAGS_RELWITHDEBINFO "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES LINK_FLAGS_RELEASE "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES LINK_FLAGS_DEBUG "/NODEFAULTLIB:${VCOMP_LIB}d")
set_target_properties(${libname} PROPERTIES STATIC_LIBRARY_FLAGS_MINSIZEREL "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES STATIC_LIBRARY_FLAGS_RELWITHDEBINFO "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES STATIC_LIBRARY_FLAGS_RELEASE "/NODEFAULTLIB:${VCOMP_LIB}")
set_target_properties(${libname} PROPERTIES STATIC_LIBRARY_FLAGS_DEBUG "/NODEFAULTLIB:${VCOMP_LIB}d")
endif()
endfunction()
##############################################################################
# Set old-style FindCuda.cmake compile flags from modern CMake cuda flags.
# Usage:
# torch_update_find_cuda_flags()
function(torch_update_find_cuda_flags)
# Convert -O2 -Xcompiler="-O2 -Wall" to "-O2;-Xcompiler=-O2,-Wall"
if(USE_CUDA)
separate_arguments(FLAGS UNIX_COMMAND "${CMAKE_CUDA_FLAGS}")
string(REPLACE " " "," FLAGS "${FLAGS}")
set(CUDA_NVCC_FLAGS ${FLAGS} PARENT_SCOPE)
separate_arguments(FLAGS_DEBUG UNIX_COMMAND "${CMAKE_CUDA_FLAGS_DEBUG}")
string(REPLACE " " "," FLAGS_DEBUG "${FLAGS_DEBUG}")
set(CUDA_NVCC_FLAGS_DEBUG "${FLAGS_DEBUG}" PARENT_SCOPE)
separate_arguments(FLAGS_RELEASE UNIX_COMMAND "${CMAKE_CUDA_FLAGS_RELEASE}")
string(REPLACE " " "," FLAGS_RELEASE "${FLAGS_RELEASE}")
set(CUDA_NVCC_FLAGS_RELEASE "${FLAGS_RELEASE}" PARENT_SCOPE)
separate_arguments(FLAGS_MINSIZEREL UNIX_COMMAND "${CMAKE_CUDA_FLAGS_MINSIZEREL}")
string(REPLACE " " "," FLAGS_MINSIZEREL "${FLAGS_MINSIZEREL}")
set(CUDA_NVCC_FLAGS_MINSIZEREL "${FLAGS_MINSIZEREL}" PARENT_SCOPE)
separate_arguments(FLAGS_RELWITHDEBINFO UNIX_COMMAND "${CMAKE_CUDA_FLAGS_RELWITHDEBINFO}")
string(REPLACE " " "," FLAGS_RELWITHDEBINFO "${FLAGS_RELWITHDEBINFO}")
set(CUDA_NVCC_FLAGS_RELWITHDEBINFO "${FLAGS_RELWITHDEBINFO}" PARENT_SCOPE)
message(STATUS "Converting CMAKE_CUDA_FLAGS to CUDA_NVCC_FLAGS:\n"
" CUDA_NVCC_FLAGS = ${FLAGS}\n"
" CUDA_NVCC_FLAGS_DEBUG = ${FLAGS_DEBUG}\n"
" CUDA_NVCC_FLAGS_RELEASE = ${FLAGS_RELEASE}\n"
" CUDA_NVCC_FLAGS_RELWITHDEBINFO = ${FLAGS_RELWITHDEBINFO}\n"
" CUDA_NVCC_FLAGS_MINSIZEREL = ${FLAGS_MINSIZEREL}")
endif()
endfunction()
##############################################################################
# CHeck if given flag is supported and append it to provided outputvar
# Also define HAS_UPPER_CASE_FLAG_NAME variable
# Usage:
# append_cxx_flag_if_supported("-Werror" CMAKE_CXX_FLAGS)
function(append_cxx_flag_if_supported flag outputvar)
string(TOUPPER "HAS${flag}" _FLAG_NAME)
string(REGEX REPLACE "[=-]" "_" _FLAG_NAME "${_FLAG_NAME}")
check_cxx_compiler_flag("${flag}" ${_FLAG_NAME})
if(${_FLAG_NAME})
string(APPEND ${outputvar} " ${flag}")
set(${outputvar} "${${outputvar}}" PARENT_SCOPE)
endif()
endfunction()
function(target_compile_options_if_supported target flag)
set(_compile_options "")
append_cxx_flag_if_supported("${flag}" _compile_options)
if(NOT "${_compile_options}" STREQUAL "")
target_compile_options(${target} PRIVATE ${flag})
endif()
endfunction()
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