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Daniel Eisenberg
225
cmake/FindBrotli.cmake
Executable file
225
cmake/FindBrotli.cmake
Executable file
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# FindBrotli.cmake
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#
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# Supports COMPONENTS:
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# decoder, encoder, common
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#
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# Exports targets:
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# Brotli::decoder
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# Brotli::encoder
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# Brotli::common
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#
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# Optional variables:
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# BROTLI_ROOT_DIR
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# BROTLI_USE_STATIC_LIBS
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# ------------------------------------------------------------
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# Version handling (not supported)
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# ------------------------------------------------------------
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if(Brotli_FIND_VERSION)
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set(_brotli_version_error_msg "FindBrotli.cmake does not support version checking.")
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if(Brotli_FIND_REQUIRED)
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message(FATAL_ERROR "${_brotli_version_error_msg}")
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elseif(NOT Brotli_FIND_QUIETLY)
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message(WARNING "${_brotli_version_error_msg}")
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endif()
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endif()
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# ------------------------------------------------------------
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# Component dependencies
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# ------------------------------------------------------------
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if(Brotli_FIND_REQUIRED_decoder OR Brotli_FIND_REQUIRED_encoder)
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set(Brotli_FIND_REQUIRED_common TRUE)
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endif()
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# ------------------------------------------------------------
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# Static library preference
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# ------------------------------------------------------------
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if(BROTLI_USE_STATIC_LIBS)
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set(_brotli_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
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if(WIN32)
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set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a)
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else()
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set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
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endif()
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endif()
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# ------------------------------------------------------------
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# Optional pkg-config
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# ------------------------------------------------------------
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find_package(PkgConfig QUIET)
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# ------------------------------------------------------------
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# Includes
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# ------------------------------------------------------------
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find_path(Brotli_INCLUDE_DIR
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NAMES
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brotli/decode.h
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brotli/encode.h
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HINTS
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${BROTLI_ROOT_DIR}
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PATH_SUFFIXES
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include
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includes
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)
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mark_as_advanced(Brotli_INCLUDE_DIR)
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# ------------------------------------------------------------
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# Internal state
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# ------------------------------------------------------------
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set(_brotli_req_vars "")
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# For figuring out the real (non-ALIAS) targets when using pkg-config
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set(_brotli_decoder_real_target "")
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set(_brotli_encoder_real_target "")
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set(_brotli_common_real_target "")
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if(BROTLI_USE_STATIC_LIBS)
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set(_brotli_stat_str "_STATIC")
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else()
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set(_brotli_stat_str "")
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endif()
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# ------------------------------------------------------------
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# Components loop
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# ------------------------------------------------------------
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foreach(_listvar "common;common" "decoder;dec" "encoder;enc")
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list(GET _listvar 0 _component)
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list(GET _listvar 1 _libname)
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# ---- pkg-config path ----
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if(PKG_CONFIG_FOUND)
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if(BROTLI_USE_STATIC_LIBS)
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pkg_check_modules(
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Brotli_${_component}_STATIC
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QUIET
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GLOBAL
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IMPORTED_TARGET
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libbrotli${_libname}
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)
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else()
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pkg_check_modules(
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Brotli_${_component}
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QUIET
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GLOBAL
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IMPORTED_TARGET
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libbrotli${_libname}
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)
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endif()
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endif()
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# If pkg-config created an imported target, make our alias to it.
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if(TARGET PkgConfig::Brotli_${_component}${_brotli_stat_str})
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add_library(
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Brotli::${_component}
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ALIAS
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PkgConfig::Brotli_${_component}${_brotli_stat_str}
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)
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# Save the underlying real target name for later linkage fixes
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set(_brotli_${_component}_real_target "PkgConfig::Brotli_${_component}${_brotli_stat_str}")
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set(Brotli_${_component}_FOUND TRUE)
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if(Brotli_FIND_REQUIRED_${_component})
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# For FindPackageHandleStandardArgs: ensure libraries are actually present
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if(BROTLI_USE_STATIC_LIBS)
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list(APPEND _brotli_req_vars Brotli_${_component}_STATIC_LIBRARIES)
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else()
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list(APPEND _brotli_req_vars Brotli_${_component}_LINK_LIBRARIES)
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endif()
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endif()
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continue()
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endif()
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# ---- find_library path ----
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if(Brotli_FIND_REQUIRED_${_component})
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list(APPEND _brotli_req_vars Brotli_${_component})
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endif()
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if(BROTLI_USE_STATIC_LIBS)
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set(_brotli_names
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brotli${_libname}-static
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libbrotli${_libname}-static
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)
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else()
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set(_brotli_names
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brotli${_libname}
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libbrotli${_libname}
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)
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endif()
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find_library(Brotli_${_component}
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NAMES ${_brotli_names}
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HINTS ${BROTLI_ROOT_DIR}
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PATH_SUFFIXES
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lib
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lib64
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libs
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libs64
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lib/x86_64-linux-gnu
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)
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mark_as_advanced(Brotli_${_component})
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if(Brotli_${_component})
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set(Brotli_${_component}_FOUND TRUE)
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add_library(Brotli::${_component} UNKNOWN IMPORTED)
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set_target_properties(Brotli::${_component} PROPERTIES
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IMPORTED_LOCATION "${Brotli_${_component}}"
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INTERFACE_INCLUDE_DIRECTORIES "${Brotli_INCLUDE_DIR}"
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)
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# In this branch, our target is real (not ALIAS), so it can be linked later.
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set(_brotli_${_component}_real_target "Brotli::${_component}")
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else()
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set(Brotli_${_component}_FOUND FALSE)
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endif()
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endforeach()
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# ------------------------------------------------------------
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# Link decoder/encoder → common (but never on ALIAS targets or IMPORTED targets)
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# ------------------------------------------------------------
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if(_brotli_common_real_target)
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foreach(_comp decoder encoder)
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if(_brotli_${_comp}_real_target)
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# Only link if the target is NOT an ALIAS and NOT an IMPORTED target
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get_target_property(_aliased ${_brotli_${_comp}_real_target} ALIASED_TARGET)
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get_target_property(_imported ${_brotli_${_comp}_real_target} IMPORTED)
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if(NOT _aliased AND NOT _imported)
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target_link_libraries(${_brotli_${_comp}_real_target} INTERFACE ${_brotli_common_real_target})
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endif()
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endif()
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endforeach()
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endif()
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# ------------------------------------------------------------
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# Aggregate convenience variables
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# ------------------------------------------------------------
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set(Brotli_LIBRARIES "")
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foreach(_comp decoder encoder common)
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if(TARGET Brotli::${_comp})
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list(APPEND Brotli_LIBRARIES Brotli::${_comp})
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endif()
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endforeach()
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# ------------------------------------------------------------
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# Final package check (FIXED: use _brotli_req_vars)
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# ------------------------------------------------------------
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Brotli
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FOUND_VAR
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Brotli_FOUND
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REQUIRED_VARS
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Brotli_INCLUDE_DIR
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${_brotli_req_vars}
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HANDLE_COMPONENTS
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)
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# ------------------------------------------------------------
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# Restore suffixes
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# ------------------------------------------------------------
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if(BROTLI_USE_STATIC_LIBS)
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set(CMAKE_FIND_LIBRARY_SUFFIXES ${_brotli_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
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endif()
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