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# Copyright Louis Dionne 2016
# Copyright Zach Laine 2024
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
###############################################################################
# Boost
###############################################################################
set(Boost_USE_STATIC_LIBS ON)
if (NOT BOOST_BRANCH)
set(BOOST_BRANCH master)
endif()
add_custom_target(boost_clone_superproject
DEPENDS
${CMAKE_BINARY_DIR}/boost_root/LICENSE_1_0.txt
COMMENT
"Cloning Boost superproject."
VERBATIM)
add_custom_command(
OUTPUT ${CMAKE_BINARY_DIR}/boost_root/LICENSE_1_0.txt
COMMAND git clone --depth 100 -b ${BOOST_BRANCH}
https://github.com/boostorg/boost.git boost_root
WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
# MSVC determines the compiler and not the target platform
# here we need to check WIN32
if (WIN32)
set(b2_exe b2.exe)
else()
set(b2_exe b2)
endif()
add_custom_target(boost_clone_deps
DEPENDS
${CMAKE_BINARY_DIR}/boost_root/${b2_exe}
COMMENT
"Cloning Boost dependencies."
VERBATIM)
add_dependencies(boost_clone_deps boost_clone_superproject)
if (WIN32)
# Windows:
# in order to build 'b2_exe' with the same toolset as configured in the current cmake run,
# we need to tell the boost bootstrap process and pass some parameters
# - as first parameter msvc, gcc or clang for the compiler type
# - additionally, for non-MSVC we need to set the environment variable CXX to the compiler: ${CMAKE_CXX_COMPILER} which
# is a fully qualified path name, so that the compiler can be found by the bootstrap_cmd
# calling b2.exe should work also for non-MSVC compilers, as during the build, the runtime directory is part of the search PATH
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
message(STATUS "configure BOOST for Visual Studio built-in compilers (i.e cl, clang-cl and clang")
set(bootstrap_cmd ./bootstrap.bat msvc)
# here we do not need to distinguish the different compilers as only the frontend is different
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
message(STATUS "configure BOOST for Clang compiler")
set(bootstrap_cmd ./bootstrap.bat clang)
set(COMMAND_ENV set CXX=${CMAKE_CXX_COMPILER})
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
message(STATUS "configure BOOST for GCC compiler")
set(bootstrap_cmd ./bootstrap.bat gcc)
set(COMMAND_ENV set CXX=${CMAKE_CXX_COMPILER})
endif ()
else()
# windres produces relocations that are rejected
# by stricter ld configurations used in some distros
set(bootstrap_cmd env B2_DONT_EMBED_MANIFEST=true ./bootstrap.sh)
endif()
add_custom_command(
OUTPUT ${CMAKE_BINARY_DIR}/boost_root/${b2_exe}
COMMAND git submodule init libs/assert
COMMAND git submodule init libs/config
COMMAND git submodule init libs/core
COMMAND git submodule init libs/hana
COMMAND git submodule init tools/build
COMMAND git submodule init libs/headers
COMMAND git submodule init tools/boost_install
COMMAND git submodule update --jobs 3 --depth 100
COMMAND ${COMMAND_ENV}
COMMAND ${bootstrap_cmd}
COMMAND ./b2 headers
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/boost_root)
add_library(boost INTERFACE)
add_dependencies(boost boost_clone_deps)
target_include_directories(boost INTERFACE ${CMAKE_BINARY_DIR}/boost_root)
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