59 lines
3.1 KiB
CMake
59 lines
3.1 KiB
CMake
# The ISO C++ File System Technical Specification (ISO-TS, or STD) was optional.
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# http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4100.pdf
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# It is part of c++17.
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# The library may be not available or working correctly in the std library you use. As a workaround we may try
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# to "implement" it (ab)using Boost (almost compatible)
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# http://www.boost.org/doc/libs/1_60_0/libs/filesystem/doc/index.htm
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# or you can choose to use the (partial, but functional) implementation provided by nana.
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# If you include the file <nana/filesystem/filesystem.hpp> or <nana/filesystem/filesystem_ext.hpp>
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# the selected option will be inlined by nana into std::filesystem
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# By default Nana will try to use the STD. If STD is not available Nana own implementation will be used.
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# You can change that default if you change one of the following
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# (please don't define more than one of the _XX_FORCE options):
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option(NANA_CMAKE_NANA_FILESYSTEM_FORCE "Force nana filesystem over ISO and boost?" OFF)
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option(NANA_CMAKE_STD_FILESYSTEM_FORCE "Use of STD filesystem?(a compilation error will ocurre if not available)" OFF)
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option(NANA_CMAKE_BOOST_FILESYSTEM_FORCE "Force use of Boost filesystem if available (over STD)?" OFF)
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option(NANA_CMAKE_FIND_BOOST_FILESYSTEM "Search: Is Boost filesystem available?" OFF)
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if(NANA_CMAKE_NANA_FILESYSTEM_FORCE)
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if(NANA_CMAKE_STD_FILESYSTEM_FORCE)
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message (FATAL_ERROR "Defined NANA_CMAKE_NANA_FILESYSTEM_FORCE and NANA_CMAKE_STD_FILESYSTEM_FORCE")
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endif()
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if(NANA_CMAKE_BOOST_FILESYSTEM_FORCE)
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message (FATAL_ERROR "Defined NANA_CMAKE_NANA_FILESYSTEM_FORCE and NANA_CMAKE_BOOST_FILESYSTEM_FORCE")
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endif()
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target_compile_definitions(nana PUBLIC NANA_FILESYSTEM_FORCE)
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elseif(NANA_CMAKE_BOOST_FILESYSTEM_FORCE)
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if(NANA_CMAKE_STD_FILESYSTEM_FORCE)
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message (FATAL_ERROR "Defined NANA_CMAKE_BOOST_FILESYSTEM_FORCE and NANA_CMAKE_STD_FILESYSTEM_FORCE")
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endif()
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target_compile_definitions(nana PUBLIC BOOST_FILESYSTEM_FORCE)
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# https://cmake.org/cmake/help/git-master/module/FindBoost.html
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# Implicit dependencies such as Boost::filesystem requiring Boost::system will be automatically detected and satisfied,
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# even if system is not specified when using find_package and if Boost::system is not added to target_link_libraries.
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# If using Boost::thread, then Thread::Thread will also be added automatically.
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find_package(Boost REQUIRED COMPONENTS filesystem)
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if(Boost_FOUND)
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target_compile_definitions(nana PUBLIC BOOST_FILESYSTEM_AVAILABLE)
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# SYSTEM - ignore warnings from here
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target_include_directories(nana SYSTEM PUBLIC "${Boost_INCLUDE_DIR}") # ?? SYSTEM
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target_link_libraries (nana PUBLIC ${Boost_LIBRARIES})
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# target_include_directories (nana SYSTEM PUBLIC Boost::Boost)
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# message("boost found true")
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endif()
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set(Boost_USE_STATIC_LIBS ON)
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set(Boost_USE_STATIC_RUNTIME ON)
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else()
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# todo test for std (for now just force nana or boost if there no std)
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target_link_libraries (nana PUBLIC stdc++fs)
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# todo if not test for boost
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# if not add nana filesystem
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endif()
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