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# Utility functions for packaging an LLVM distribution. See the
# BuildingADistribution documentation for more details.
# These functions assume a number of conventions that are common across all LLVM
# subprojects:
# - The generated CMake exports file for ${project} is called ${project}Targets
# (except for LLVM where it's called ${project}Exports for legacy reasons).
# - The build target for the CMake exports is called ${project}-cmake-exports
# (except LLVM where it's just cmake-exports).
# - The ${PROJECT}${distribution}_HAS_EXPORTS global property holds whether a
# project has any exports for a particular ${distribution} (where ${PROJECT}
# is the project name in uppercase).
# - The ${PROJECT}_CMAKE_DIR variable is computed by ${project}Config.cmake to
# hold the path of the installed CMake modules directory.
# - The ${PROJECT}_INSTALL_PACKAGE_DIR variable contains the install destination
# for the project's CMake modules.
include_guard(GLOBAL)
if(LLVM_DISTRIBUTION_COMPONENTS AND LLVM_DISTRIBUTIONS)
message(FATAL_ERROR "LLVM_DISTRIBUTION_COMPONENTS and LLVM_DISTRIBUTIONS cannot be specified together")
endif()
if(LLVM_DISTRIBUTION_COMPONENTS OR LLVM_DISTRIBUTIONS)
if(LLVM_ENABLE_IDE)
message(FATAL_ERROR "LLVM_DISTRIBUTION_COMPONENTS cannot be specified with multi-configuration generators (i.e. Xcode or Visual Studio)")
endif()
endif()
# Build the map of targets to distributions that's used to look up the
# distribution for a target later. The distribution for ${target} is stored in
# the global property LLVM_DISTRIBUTION_FOR_${target}.
function(llvm_distribution_build_target_map)
foreach(target ${LLVM_DISTRIBUTION_COMPONENTS})
# CMake doesn't easily distinguish between properties that are unset and
# properties that are empty (you have to do a second get_property call with
# the SET option, which is unergonomic), so just use a special marker to
# denote the default (unnamed) distribution.
set_property(GLOBAL PROPERTY LLVM_DISTRIBUTION_FOR_${target} "<DEFAULT>")
endforeach()
foreach(distribution ${LLVM_DISTRIBUTIONS})
foreach(target ${LLVM_${distribution}_DISTRIBUTION_COMPONENTS})
# We don't allow a target to be in multiple distributions, because we
# wouldn't know which export set to place it in.
get_property(current_distribution GLOBAL PROPERTY LLVM_DISTRIBUTION_FOR_${target})
if(current_distribution AND NOT current_distribution STREQUAL distribution)
message(SEND_ERROR "Target ${target} cannot be in multiple distributions ${distribution} and ${current_distribution}")
endif()
set_property(GLOBAL PROPERTY LLVM_DISTRIBUTION_FOR_${target} ${distribution})
endforeach()
endforeach()
endfunction()
# The include guard ensures this will only be called once. The rest of this file
# only defines other functions (i.e. it doesn't execute any more code directly).
llvm_distribution_build_target_map()
# Look up the distribution a particular target belongs to.
# - target: The target to look up.
# - in_distribution_var: The variable with this name is set in the caller's
# scope to indicate if the target is in any distribution. If no distributions
# have been configured, this will always be set to true.
# - distribution_var: The variable with this name is set in the caller's scope
# to indicate the distribution name for the target. If the target belongs to
# the default (unnamed) distribution, or if no distributions have been
# configured, it's set to the empty string.
# - UMBRELLA: The (optional) umbrella target that the target is a part of. For
# example, all LLVM libraries have the umbrella target llvm-libraries.
function(get_llvm_distribution target in_distribution_var distribution_var)
if(NOT LLVM_DISTRIBUTION_COMPONENTS AND NOT LLVM_DISTRIBUTIONS)
set(${in_distribution_var} YES PARENT_SCOPE)
set(${distribution_var} "" PARENT_SCOPE)
return()
endif()
cmake_parse_arguments(ARG "" UMBRELLA "" ${ARGN})
get_property(distribution GLOBAL PROPERTY LLVM_DISTRIBUTION_FOR_${target})
if(ARG_UMBRELLA)
get_property(umbrella_distribution GLOBAL PROPERTY LLVM_DISTRIBUTION_FOR_${ARG_UMBRELLA})
if(distribution AND umbrella_distribution AND NOT distribution STREQUAL umbrella_distribution)
message(SEND_ERROR "Target ${target} has different distribution ${distribution} from its"
" umbrella target ${ARG_UMBRELLA} distribution ${umbrella_distribution}")
elseif(NOT distribution)
set(distribution ${umbrella_distribution})
endif()
endif()
if(distribution)
set(${in_distribution_var} YES PARENT_SCOPE)
if(distribution STREQUAL "<DEFAULT>")
set(distribution "")
endif()
set(${distribution_var} "${distribution}" PARENT_SCOPE)
else()
set(${in_distribution_var} NO PARENT_SCOPE)
endif()
endfunction()
# Get the EXPORT argument to use for an install command for a target in a
# project. As explained at the top of the file, the project export set for a
# distribution is named ${project}{distribution}Targets (except for LLVM where
# it's named ${project}{distribution}Exports for legacy reasons). Also set the
# ${PROJECT}_${DISTRIBUTION}_HAS_EXPORTS global property to mark the project as
# having exports for the distribution.
# - target: The target to get the EXPORT argument for.
# - project: The project to produce the argument for. IMPORTANT: The casing of
# this argument should match the casing used by the project's Config.cmake
# file. The correct casing for the LLVM projects is Clang, Flang, LLD, LLVM,
# and MLIR.
# - export_arg_var The variable with this name is set in the caller's scope to
# the EXPORT argument for the target for the project.
# - UMBRELLA: The (optional) umbrella target that the target is a part of. For
# example, all LLVM libraries have the umbrella target llvm-libraries.
function(get_target_export_arg target project export_arg_var)
string(TOUPPER "${project}" project_upper)
if(project STREQUAL "LLVM")
set(suffix "Exports") # legacy
else()
set(suffix "Targets")
endif()
get_llvm_distribution(${target} in_distribution distribution ${ARGN})
if(in_distribution)
set(${export_arg_var} EXPORT ${project}${distribution}${suffix} PARENT_SCOPE)
if(distribution)
string(TOUPPER "${distribution}" distribution_upper)
set_property(GLOBAL PROPERTY ${project_upper}_${distribution_upper}_HAS_EXPORTS True)
else()
set_property(GLOBAL PROPERTY ${project_upper}_HAS_EXPORTS True)
endif()
else()
set(${export_arg_var} "" PARENT_SCOPE)
endif()
endfunction()
# Produce a string of CMake include() commands to include the exported targets
# files for all distributions. See the comment at the top of this file for
# various assumptions made.
# - project: The project to produce the commands for. IMPORTANT: See the comment
# for get_target_export_arg above for the correct casing of this argument.
# - includes_var: The variable with this name is set in the caller's scope to
# the string of include commands.
function(get_config_exports_includes project includes_var)
string(TOUPPER "${project}" project_upper)
set(prefix "\${${project_upper}_CMAKE_DIR}/${project}")
if(project STREQUAL "LLVM")
set(suffix "Exports.cmake") # legacy
else()
set(suffix "Targets.cmake")
endif()
if(NOT LLVM_DISTRIBUTIONS)
set(${includes_var} "include(\"${prefix}${suffix}\")" PARENT_SCOPE)
else()
set(includes)
foreach(distribution ${LLVM_DISTRIBUTIONS})
list(APPEND includes "include(\"${prefix}${distribution}${suffix}\" OPTIONAL)")
endforeach()
string(REPLACE ";" "\n" includes "${includes}")
set(${includes_var} "${includes}" PARENT_SCOPE)
endif()
endfunction()
# Create the install commands and targets for the distributions' CMake exports.
# The target to install ${distribution} for a project is called
# ${project}-${distribution}-cmake-exports, where ${project} is the project name
# in lowercase and ${distribution} is the distribution name in lowercase, except
# for LLVM, where the target is just called ${distribution}-cmake-exports. See
# the comment at the top of this file for various assumptions made.
# - project: The project. IMPORTANT: See the comment for get_target_export_arg
# above for the correct casing of this argument.
function(install_distribution_exports project)
string(TOUPPER "${project}" project_upper)
string(TOLOWER "${project}" project_lower)
if(project STREQUAL "LLVM")
set(prefix "")
set(suffix "Exports") # legacy
else()
set(prefix "${project_lower}-")
set(suffix "Targets")
endif()
set(destination "${${project_upper}_INSTALL_PACKAGE_DIR}")
if(NOT LLVM_DISTRIBUTIONS)
get_property(has_exports GLOBAL PROPERTY ${project_upper}_HAS_EXPORTS)
if(has_exports)
install(EXPORT ${project}${suffix} DESTINATION "${destination}"
COMPONENT ${prefix}cmake-exports)
endif()
else()
foreach(distribution ${LLVM_DISTRIBUTIONS})
string(TOUPPER "${distribution}" distribution_upper)
get_property(has_exports GLOBAL PROPERTY ${project_upper}_${distribution_upper}_HAS_EXPORTS)
if(has_exports)
string(TOLOWER "${distribution}" distribution_lower)
set(target ${prefix}${distribution_lower}-cmake-exports)
install(EXPORT ${project}${distribution}${suffix} DESTINATION "${destination}"
COMPONENT ${target})
if(NOT LLVM_ENABLE_IDE)
add_custom_target(${target})
add_llvm_install_targets(install-${target} COMPONENT ${target})
endif()
endif()
endforeach()
endif()
endfunction()
# Create the targets for installing the configured distributions. The
# ${distribution} target builds the distribution, install-${distribution}
# installs it, and install-${distribution}-stripped installs a stripped version,
# where ${distribution} is the distribution name in lowercase, or "distribution"
# for the default distribution.
function(llvm_distribution_add_targets)
set(distributions "${LLVM_DISTRIBUTIONS}")
if(NOT distributions)
# CMake seemingly doesn't distinguish between an empty list and a list
# containing one element which is the empty string, so just use a special
# marker to denote the default (unnamed) distribution and fix it in the
# loop.
set(distributions "<DEFAULT>")
endif()
foreach(distribution ${distributions})
if(distribution STREQUAL "<DEFAULT>")
set(distribution_target distribution)
# Preserve legacy behavior for LLVM_DISTRIBUTION_COMPONENTS.
set(distribution_components ${LLVM_DISTRIBUTION_COMPONENTS} ${LLVM_RUNTIME_DISTRIBUTION_COMPONENTS})
else()
string(TOLOWER "${distribution}" distribution_lower)
set(distribution_target ${distribution_lower}-distribution)
set(distribution_components ${LLVM_${distribution}_DISTRIBUTION_COMPONENTS})
endif()
add_custom_target(${distribution_target})
add_custom_target(install-${distribution_target})
add_custom_target(install-${distribution_target}-stripped)
foreach(target ${distribution_components})
if(TARGET ${target})
add_dependencies(${distribution_target} ${target})
else()
message(SEND_ERROR "Specified distribution component '${target}' doesn't have a target")
endif()
if(TARGET install-${target})
add_dependencies(install-${distribution_target} install-${target})
else()
message(SEND_ERROR "Specified distribution component '${target}' doesn't have an install target")
endif()
if(TARGET install-${target}-stripped)
add_dependencies(install-${distribution_target}-stripped install-${target}-stripped)
else()
message(SEND_ERROR
"Specified distribution component '${target}' doesn't have an install-stripped target."
" Its installation target creation should be changed to use add_llvm_install_targets,"
" or you should manually create the 'install-${target}-stripped' target.")
endif()
endforeach()
endforeach()
endfunction()
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