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Support CMake root mode

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This commit is contained in:
Alan de Freitas
2025-09-04 20:03:49 -05:00
committed by Gennaro Prota
parent 4a928c8787
commit 17e2192154
1 changed files with 53 additions and 12 deletions
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65
CMakeLists.txt
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@@ -7,26 +7,67 @@
cmake_minimum_required(VERSION 3.5...3.16)
project(boost_dynamic_bitset VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
set(BOOST_DYNAMIC_BITSET_IS_ROOT OFF)
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
set(BOOST_DYNAMIC_BITSET_IS_ROOT ON)
endif ()
add_library(boost_dynamic_bitset INTERFACE)
add_library(Boost::dynamic_bitset ALIAS boost_dynamic_bitset)
target_include_directories(boost_dynamic_bitset INTERFACE include)
if (NOT DYNAMIC_BITSET_MRDOCS_BUILD)
target_link_libraries(boost_dynamic_bitset
INTERFACE
Boost::assert
Boost::config
Boost::container_hash
Boost::core
Boost::integer
Boost::move
Boost::static_assert
Boost::throw_exception
)
if (BOOST_DYNAMIC_BITSET_IS_ROOT)
# This means this script will be executed as the root CMakeLists.txt
# so the Boost:: targets are not available unless we explicitly include
# them here. MrDocs executes this script as root too.
if (NOT DEFINED BOOST_SRC_DIR AND DEFINED ENV{BOOST_SRC_DIR})
set(DEFAULT_BOOST_SRC_DIR "$ENV{BOOST_SRC_DIR}")
else ()
set(DEFAULT_BOOST_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
endif ()
set(BOOST_SRC_DIR ${DEFAULT_BOOST_SRC_DIR} CACHE STRING "Boost source dir to use when running CMake from this directory")
if (NOT IS_ABSOLUTE ${BOOST_SRC_DIR})
set(BOOST_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${BOOST_SRC_DIR}")
endif ()
# Validate BOOST_SRC_DIR
set(BOOST_SRC_DIR_IS_VALID ON)
foreach (F "CMakeLists.txt" "Jamroot" "boost-build.jam" "bootstrap.sh" "libs")
if (NOT EXISTS "${BOOST_SRC_DIR}/${F}")
message(STATUS "${BOOST_SRC_DIR}/${F} does not exist. Fallback to find_package.")
set(BOOST_SRC_DIR_IS_VALID OFF)
break()
endif ()
endforeach ()
if (NOT BOOST_SRC_DIR_IS_VALID)
message(FATAL_ERROR "BOOST_SRC_DIR is not valid. Please set it to the root of a Boost checkout.")
endif ()
# If BOOST_SRC_DIR is valid, fallback to find_package
set(CMAKE_FOLDER Dependencies)
set(BOOST_INCLUDE_LIBRARIES assert config container_hash core integer move static_assert throw_exception)
set(BOOST_EXCLUDE_LIBRARIES dynamic_bitset)
set(PREV_BUILD_TESTING ${BUILD_TESTING})
set(BUILD_TESTING OFF CACHE BOOL "Build the tests." FORCE)
add_subdirectory(${BOOST_SRC_DIR} Dependencies/boost EXCLUDE_FROM_ALL)
set(BUILD_TESTING ${PREV_BUILD_TESTING} CACHE BOOL "Build the tests." FORCE)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${BOOST_SRC_DIR}/tools/cmake/include")
unset(CMAKE_FOLDER)
endif()
target_link_libraries(boost_dynamic_bitset
INTERFACE
Boost::assert
Boost::config
Boost::container_hash
Boost::core
Boost::integer
Boost::move
Boost::static_assert
Boost::throw_exception
)
if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
add_subdirectory(test)