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179 lines
6.4 KiB
CMake
179 lines
6.4 KiB
CMake
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# A simple FindBrotli package for Cmake's find_package function.
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# Note: This find package doesn't have version support, as the version file doesn't seem to be installed on most systems.
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#
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# If you want to find the static packages instead of shared (the default), define BROTLI_USE_STATIC_LIBS as TRUE.
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# The targets will have the same names, but it will use the static libs.
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#
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# Valid find_package COMPONENTS names: "decoder", "encoder", and "common"
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# Note that if you're requiring "decoder" or "encoder", then "common" will be automatically added as required.
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#
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# Defines the libraries (if found): Brotli::decoder, Brotli::encoder, Brotli::common
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# and the includes path variable: Brotli_INCLUDE_DIR
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#
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# If it's failing to find the libraries, try setting BROTLI_ROOT_DIR to the folder containing your library & include dir.
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# If they asked for a specific version, warn/fail since we don't support it.
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# TODO: if they start distributing the version somewhere, implement finding it.
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# But currently there's a version header that doesn't seem to get installed.
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if(Brotli_FIND_VERSION)
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set(_brotli_version_error_msg "FindBrotli.cmake doesn't have version support!")
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# If the package is required, throw a fatal error
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# Otherwise, if not running quietly, we throw a warning
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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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# Since both decoder & encoder require the common lib, force its requirement..
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# if the user is requiring either of those other libs.
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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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# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
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# Credit to FindOpenSSL.cmake for this
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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 ${CMAKE_FIND_LIBRARY_SUFFIXES})
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else()
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set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
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endif()
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endif()
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# Make PkgConfig optional, since some users (mainly Windows) don't have it.
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# But it's a lot more clean than manually using find_library.
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find_package(PkgConfig QUIET)
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# Only used if the PkgConfig libraries aren't used.
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find_path(Brotli_INCLUDE_DIR
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NAMES
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"brotli/decode.h"
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"brotli/encode.h"
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HINTS
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${BROTLI_ROOT_DIR}
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PATH_SUFFIXES
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"include"
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"includes"
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DOC "The path to Brotli's include directory."
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)
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# Hides this var from the GUI
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mark_as_advanced(Brotli_INCLUDE_DIR)
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# Just used for PkgConfig stuff in the loop below
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set(_brotli_stat_str "")
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if(BROTLI_USE_STATIC_LIBS)
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set(_brotli_stat_str "_STATIC")
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endif()
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# Lets us know we are using the PkgConfig libraries
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# Will be set false if any non-pkgconf vars are used
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set(_brotli_using_pkgconf TRUE)
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# Each string here is "ComponentName;LiteralName" (the semi-colon is a delimiter)
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foreach(_listvar "common;common" "decoder;dec" "encoder;enc")
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# Split the component name and literal library name from the listvar
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list(GET _listvar 0 _component_name)
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list(GET _listvar 1 _libname)
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if(PKG_CONFIG_FOUND)
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# These need to be GLOBAL for MinGW when making ALIAS libraries against them.
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if(BROTLI_USE_STATIC_LIBS)
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# Have to use _STATIC to tell PkgConfig to find the static libs.
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pkg_check_modules(Brotli_${_component_name}_STATIC QUIET GLOBAL IMPORTED_TARGET libbrotli${_libname})
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else()
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pkg_check_modules(Brotli_${_component_name} QUIET GLOBAL IMPORTED_TARGET libbrotli${_libname})
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endif()
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endif()
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# Check if the target was already found by Pkgconf
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if(TARGET PkgConfig::Brotli_${_component_name} OR TARGET PkgConfig::Brotli_${_component_name}_STATIC)
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# Can't use generators for ALIAS targets, so you get this jank
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add_library(Brotli::${_component_name} ALIAS PkgConfig::Brotli_${_component_name}${_brotli_stat_str})
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# Tells HANDLE_COMPONENTS we found the component
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set(Brotli_${_component_name}_FOUND TRUE)
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if(Brotli_FIND_REQUIRED_${_component_name})
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# If the lib is required, we can add its literal path as a required var for FindPackageHandleStandardArgs
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# Since it won't accept the PkgConfig targets
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if(BROTLI_USE_STATIC_LIBS)
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list(APPEND _brotli_req_vars "Brotli_${_component_name}_STATIC_LIBRARIES")
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else()
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list(APPEND _brotli_req_vars "Brotli_${_component_name}_LINK_LIBRARIES")
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endif()
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endif()
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# Skip searching for the libs with find_library since it was already found by Pkgconf
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continue()
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endif()
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# Lets us know we aren't using the PkgConfig libraries
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set(_brotli_using_pkgconf FALSE)
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if(Brotli_FIND_REQUIRED_${_component_name})
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# If it's required, we can set the name used in find_library as a required var for FindPackageHandleStandardArgs
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list(APPEND _brotli_req_vars "Brotli_${_component_name}")
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endif()
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if(BROTLI_USE_STATIC_LIBS)
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list(APPEND _brotli_lib_names
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"brotli${_libname}-static"
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"libbrotli${_libname}-static"
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)
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else()
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list(APPEND _brotli_lib_names
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"brotli${_libname}"
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"libbrotli${_libname}"
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)
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endif()
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find_library(Brotli_${_component_name}
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NAMES ${_brotli_lib_names}
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HINTS ${BROTLI_ROOT_DIR}
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PATH_SUFFIXES
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"lib"
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"lib64"
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"libs"
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"libs64"
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"lib/x86_64-linux-gnu"
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)
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# Hide the library variable from the Cmake GUI
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mark_as_advanced(Brotli_${_component_name})
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# Unset since otherwise it'll stick around for the next loop and break things
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unset(_brotli_lib_names)
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# Check if find_library found the library
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if(Brotli_${_component_name})
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# Tells HANDLE_COMPONENTS we found the component
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set(Brotli_${_component_name}_FOUND TRUE)
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add_library("Brotli::${_component_name}" UNKNOWN IMPORTED)
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# Attach the literal library and include dir to the IMPORTED target for the end-user
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set_target_properties("Brotli::${_component_name}" PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${Brotli_INCLUDE_DIR}"
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IMPORTED_LOCATION "${Brotli_${_component_name}}"
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)
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else()
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# Tells HANDLE_COMPONENTS we found the component
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set(Brotli_${_component_name}_FOUND FALSE)
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endif()
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endforeach()
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include(FindPackageHandleStandardArgs)
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# Sets Brotli_FOUND, and fails the find_package(Brotli) call if it was REQUIRED but missing libs.
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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_required_targets}
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HANDLE_COMPONENTS
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)
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# Restore the original find library ordering
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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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