64 lines
2.3 KiB
CMake
64 lines
2.3 KiB
CMake
if(DRACO_CMAKE_DRACO_FEATURES_CMAKE_)
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return()
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endif()
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set(DRACO_CMAKE_DRACO_FEATURES_CMAKE_ 1)
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set(draco_features_file_name "${draco_build_dir}/draco/draco_features.h")
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set(draco_features_list)
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# Macro that handles tracking of Draco preprocessor symbols for the purpose of
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# producing draco_features.h.
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#
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# draco_enable_feature(FEATURE <feature_name> [TARGETS <target_name>]) FEATURE
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# is required. It should be a Draco preprocessor symbol. TARGETS is optional. It
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# can be one or more draco targets.
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#
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# When the TARGETS argument is not present the preproc symbol is added to
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# draco_features.h. When it is draco_features.h is unchanged, and
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# target_compile_options() is called for each target specified.
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macro(draco_enable_feature)
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set(def_flags)
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set(def_single_arg_opts FEATURE)
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set(def_multi_arg_opts TARGETS)
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cmake_parse_arguments(DEF "${def_flags}" "${def_single_arg_opts}"
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"${def_multi_arg_opts}" ${ARGN})
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if("${DEF_FEATURE}" STREQUAL "")
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message(FATAL_ERROR "Empty FEATURE passed to draco_enable_feature().")
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endif()
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# Do nothing/return early if $DEF_FEATURE is already in the list.
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list(FIND draco_features_list ${DEF_FEATURE} df_index)
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if(NOT df_index EQUAL -1)
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return()
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endif()
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list(LENGTH DEF_TARGETS df_targets_list_length)
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if(${df_targets_list_length} EQUAL 0)
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list(APPEND draco_features_list ${DEF_FEATURE})
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else()
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foreach(target ${DEF_TARGETS})
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target_compile_definitions(${target} PRIVATE ${DEF_FEATURE})
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endforeach()
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endif()
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endmacro()
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# Function for generating draco_features.h.
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function(draco_generate_features_h)
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file(WRITE "${draco_features_file_name}.new"
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"// GENERATED FILE -- DO NOT EDIT\n\n" "#ifndef DRACO_FEATURES_H_\n"
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"#define DRACO_FEATURES_H_\n\n")
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foreach(feature ${draco_features_list})
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file(APPEND "${draco_features_file_name}.new" "#define ${feature}\n")
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endforeach()
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file(APPEND "${draco_features_file_name}.new"
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"\n#endif // DRACO_FEATURES_H_")
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# Will replace ${draco_features_file_name} only if the file content has
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# changed. This prevents forced Draco rebuilds after CMake runs.
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configure_file("${draco_features_file_name}.new"
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"${draco_features_file_name}")
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file(REMOVE "${draco_features_file_name}.new")
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endfunction()
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