| # This module checks for C++ standard classes and their boost counterparts |
| # Filesystem variables set: |
| # STD_FILESYSTEM_FOUND - if std::filesystem is found |
| # STD_EXPERIMENTAL_FILESYSTEM_FOUND - if std::experimental::filesystem is found |
| # Boost_FILESYSTEM_FOUND - if boost::filesystem is found |
| |
| include(FindThreads) |
| |
| try_compile(STD_FILESYSTEM_FOUND "${CMAKE_BINARY_DIR}/boost-fallback-compile-tests" |
| "${CMAKE_CURRENT_LIST_DIR}/test-stdfilesystem.cpp") |
| try_compile(STD_EXPERIMENTAL_FILESYSTEM_FOUND "${CMAKE_BINARY_DIR}/boost-fallback-compile-tests" |
| "${CMAKE_CURRENT_LIST_DIR}/test-stdexpfilesystem.cpp") |
| |
| # Check for standard headers that we need, fall back to boost if they're not found |
| option(PREFER_BOOST "Prefer Boost over std:: equivalents" OFF) |
| |
| if( ${PREFER_BOOST} OR NOT ( ${STD_FILESYSTEM_FOUND} OR ${STD_EXPERIMENTAL_FILESYSTEM_FOUND} ) ) |
| find_package(Boost COMPONENTS filesystem) |
| if( ${Boost_FOUND} ) |
| try_compile(Boost_FILESYSTEM_FOUND "${CMAKE_BINARY_DIR}/boost-fallback-compile-tests" |
| "${CMAKE_CURRENT_LIST_DIR}/test-boostfilesystem.cpp") |
| endif( ${Boost_FOUND} ) |
| endif() |
| |
| if( ${STD_FILESYSTEM_FOUND} AND NOT ${PREFER_BOOST} ) |
| set( FILESYSTEM_IMPL "std::filesystem" ) |
| elseif( ${STD_EXPERIMENTAL_FILESYSTEM_FOUND} AND NOT ${PREFER_BOOST} ) |
| set( FILESYSTEM_IMPL "std::experimental::filesystem" ) |
| elseif( ${Boost_FILESYSTEM_FOUND} ) |
| set( FILESYSTEM_IMPL "boost::filesystem" ) |
| else() |
| set( FILESYSTEM_IMPL "NONE" ) |
| endif() |
| |
| |
