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Support handling of Abseil independently of Protobuf.
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| # Macros and functions for handling of Abseil | ||
| # | ||
| # To use: | ||
| # - Include the NetdataAbseil module | ||
| # - Call netdata_detect_abseil() with a list of the Abseil components you need. | ||
| # - Call netdata_add_abseil_to_target() with the name of the target that needs to link against Abseil. | ||
| # | ||
| # Copyright (c) 2024 Netdata Inc. | ||
| # SPDX-License-Identifier: GPL-3.0-or-later | ||
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| # Prepare a vendored copy of Abseil for use with Netdata | ||
| function(netdata_bundle_abseil) | ||
| include(FetchContent) | ||
| include(NetdataFetchContentExtra) | ||
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| set(FETCHCONTENT_TRY_FIND_PACKAGE_MODE NEVER) | ||
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| string(REPLACE "-fsanitize=address" "" CMAKE_C_FLAGS ${CMAKE_C_FLAGS}) | ||
| string(REPLACE "-fsanitize=address" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) | ||
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| # ignore debhelper | ||
| set(FETCHCONTENT_FULLY_DISCONNECTED Off) | ||
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| set(ABSL_PROPAGATE_CXX_STD On) | ||
| set(ABSL_ENABLE_INSTALL Off) | ||
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| message(STATUS "Preparing bundled Abseil") | ||
| FetchContent_Declare(absl | ||
| GIT_REPOSITORY https://github.com/abseil/abseil-cpp | ||
| GIT_TAG 2f9e432cce407ce0ae50676696666f33a77d42ac # 20240116.1 | ||
| ) | ||
| FetchContent_MakeAvailable_NoInstall(absl) | ||
| message(STATUS "Finished preparing bundled Abseil") | ||
| set(BUNDLED_ABSEIL PARENT_SCOPE) | ||
| endfunction() | ||
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| # Look for a system copy of Abseil, and if we can’t find it bundle a copy. | ||
| # | ||
| # _components is a list of Abseil component libraries to look for, | ||
| # without the `absl_` prefix. All of them must be found to use a system copy. | ||
| # | ||
| # If called multiple times with different lists of components, the | ||
| # end result will be as if it was called once with the union of the sets | ||
| # of components. | ||
| function(netdata_detect_abseil _components) | ||
| set(_components_found "${ENABLE_BUNDLED_ABSEIL}") | ||
| set(_cflags_other "${NETDATA_ABSEIL_CFLAGS_OTHER}") | ||
| set(_include_dirs "${NETDATA_ABSEIL_INCLUDE_DIRS}") | ||
| set(_libs "${NETDATA_ABSEIL_LIBS}") | ||
| set(_bundled "${BUNDLED_ABSEIL}") | ||
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| if(NOT BUNDLED_ABSEIL) | ||
| if(NOT ENABLE_BUNDLED_ABSEIL) | ||
| foreach(_c LISTS _components) | ||
| set(_component_name "absl_${_c}") | ||
| pkg_check_modules("${_component_name}") | ||
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| if(${_component_name}_FOUND) | ||
| list(APPEND _cflags_other "${${_component_name}_CFLAGS_OTHER}") | ||
| list(APPEND _include_dirs "${${_component_name}_INCLUDE_DIRS}") | ||
| list(APPEND _libs "${${_component_name}_LIBRARIES}") | ||
| else() | ||
| set(_components_found FALSE) | ||
| break() | ||
| endif() | ||
| endforeach() | ||
| endif() | ||
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| if(NOT _components_found) | ||
| set(_cflags_other "${NETDATA_ABSEIL_CFLAGS_OTHER}") | ||
| set(_include_dirs "${NETDATA_ABSEIL_INCLUDE_DIRS}") | ||
| set(_libs "${NETDATA_ABSEIL_LIBS}") | ||
| set(_bundled TRUE) | ||
| message(WARNING "Could not find all required Abseil components, vendoring it instead") | ||
| netdata_bundle_abseil() | ||
| endif() | ||
| endif() | ||
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| if(BUNDLED_ABSEIL) | ||
| foreach(_c LISTS _components) | ||
| set(_target "absl::${_c}") | ||
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| if(NOT TARGET ${_target}) | ||
| message(FATAL_ERROR "Abseil component ${_c} was not provided by the vendored copy of Abseil.") | ||
| endif() | ||
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| get_target_property(${_c}_cflags_other ${_target} INTERFACE_COMPILE_DEFINITIONS) | ||
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| if(NOT ${_c}_cflags_other STREQUAL ${_c}_cflags_other-NOTFOUND) | ||
| list(APPEND _cflags_other "${${_c}_cflags_other}") | ||
| endif() | ||
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| get_target_property(${_c}_include_dirs ${_target} INTERFACE_INCLUDE_DIRECTORIES) | ||
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| if(NOT ${_c}_include_dirs STREQUAL ${_c}_include_dirs-NOTFOUND) | ||
| list(APPEND _include_dirs "${${_c}_include_dirs}") | ||
| endif() | ||
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| list(APPEND _libs ${_target}) | ||
| endforeach() | ||
| endif() | ||
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| foreach(_var ITEMS _cflags_other _include_dirs _libs) | ||
| list(REMOVE_ITEM ${_var} "") | ||
| list(REMOVE_DUPLICATES ${_var}) | ||
| endforeach() | ||
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| set(NETDATA_ABSEIL_CFLAGS_OTHER "${_cflags_other}" PARENT_SCOPE) | ||
| set(NETDATA_ABSEIL_INCLUDE_DIRS "${_include_dirs}" PARENT_SCOPE) | ||
| set(NETDATA_ABSEIL_LIBS "${_libs}" PARENT_SCOPE) | ||
| set(HAVE_ABSEIL TRUE PARENT_SCOPE) | ||
| set(BUNDLED_ABSEIL "${_bundled}" PARENT_SCOPE) | ||
| endfunction() | ||
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| # Add Abseil to a specified target | ||
| # | ||
| # The _scope argument is optional, if not specified Abseil will be added as a PRIVATE dependency. | ||
| function(netdata_add_abseil_to_target _target _scope) | ||
| if(NOT _scope) | ||
| set(_scope PRIVATE) | ||
| endif() | ||
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| target_compile_definitions(${_target} ${_scope} ${NETDATA_ABSEIL_CFLAGS_OTHER}) | ||
| target_include_directories(${_target} ${_scope} ${NETDATA_ABSEIL_INCLUDE_DIRS}) | ||
| target_link_libraries(${_target} ${_scope} ${NETDATA_ABSEIL_LIBS}) | ||
| endfunction() |
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