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