if(OSSIA_USE_SYSTEM_LIBRARIES)
  find_package(re2 QUIET CONFIG)
  if(NOT TARGET re2::re2)
    find_library(RE2_LIBRARY NAMES re2)
    find_path(RE2_INCLUDE_DIR re2/re2.h)

    if(NOT RE2_LIBRARY OR NOT RE2_INCLUDE_DIR)
      message(FATAL_ERROR "re2 is required")
    endif()
    add_library(re2 INTERFACE IMPORTED GLOBAL)
    add_library(re2::re2 ALIAS re2)

    target_include_directories(re2 SYSTEM INTERFACE "${RE2_INCLUDE_DIR}")
    target_link_libraries(re2 INTERFACE "${RE2_LIBRARY}")
  endif()
else()
  add_library(re2 ${OSSIA_PREFERRED_3RDPARTY_LIBRARY_FORMAT}
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/bitmap256.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/bitstate.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/compile.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/dfa.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/filtered_re2.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/mimics_pcre.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/nfa.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/onepass.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/parse.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/perl_groups.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/prefilter.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/prefilter_tree.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/prog.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/re2.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/regexp.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/set.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/simplify.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/stringpiece.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/tostring.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/unicode_casefold.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/re2/unicode_groups.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/util/rune.cc
    ${OSSIA_3RDPARTY_FOLDER}/re2/util/strutil.cc
  )
  add_library(re2::re2 ALIAS re2)

  set_target_properties(re2 PROPERTIES UNITY_BUILD 0)
  if(MSVC)
    target_compile_options(re2 PRIVATE /utf-8)
  endif()

  if(WIN32)
    target_compile_definitions(re2 PRIVATE -DUNICODE -D_UNICODE -DSTRICT -DNOMINMAX)
    target_compile_definitions(re2 PRIVATE -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
  else()
    target_compile_options(re2 PRIVATE -w)
  endif()

  target_include_directories(re2 SYSTEM PUBLIC $<BUILD_INTERFACE:${OSSIA_3RDPARTY_FOLDER}/re2>)

  if(UNIX)
    target_link_libraries(re2 PUBLIC Threads::Threads)
  endif()

  if(OSSIA_INSTALL_STATIC_DEPENDENCIES)
    install(
      TARGETS re2
      EXPORT re2-exports
      RUNTIME DESTINATION lib
      ARCHIVE DESTINATION lib)

    install(EXPORT re2-exports
            DESTINATION lib/cmake/re2)
    export(EXPORT re2-exports)
  endif()
endif()

set(OSSIA_HAS_RE2 1 CACHE INTERNAL "")