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https://github.com/mumble-voip/mumble.git
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c7b127f7be
If the systemd module was not installed (or could not be located by pkg-config for other reasons), a big chunk of text would be emitted to stdout stating that no such module could be found and how one might resolve this issue. However, we don't want to throw this at our users as we have backup code paths implemented for the case in which pkg-config can't query the necessary information. This commit makes sure that these warnings are not emitted anymore.
295 lines
10 KiB
CMake
295 lines
10 KiB
CMake
# Copyright 2020-2022 The Mumble Developers. All rights reserved.
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# Use of this source code is governed by a BSD-style license
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# that can be found in the LICENSE file at the root of the
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# Mumble source tree or at <https://www.mumble.info/LICENSE>.
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if(debug-dependency-search)
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# Don't be quiet if the user wants to debug the dependency-search
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set(QUIET_STR "")
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else()
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set(QUIET_STR "QUIET")
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endif()
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find_package(PkgConfig ${QUIET_STR})
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include(FindPackageMessage)
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function(pkgconfig_search MODULE)
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if(NOT PkgConfig_FOUND)
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return()
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endif()
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# We don't want pkg_search_module() to write into the variables that will be passed to the pkgconfig_search()'s caller.
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set(PRIVATE "PRIVATE_${MODULE}")
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pkg_search_module(${PRIVATE} ${MODULE} ${QUIET_STR})
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if(NOT ${PRIVATE}_FOUND)
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return()
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endif()
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if(NOT ${PRIVATE}_LINK_LIBRARIES)
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foreach(LIBRARY ${${PRIVATE}_LIBRARIES})
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# A cache entry named by <VAR> is created to store the result of find_library().
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# If the library is found the result is stored in the variable and the search will not be repeated unless the variable is cleared.
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# Using a name that depends on the loop-item is suggested in contrast to clearing the variable.
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# @ref https://cmake.org/pipermail/cmake/2011-November/047171.html
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find_library(${LIBRARY}_LINK ${PRIVATE_LIBRARY} PATHS ${${PRIVATE}_LIBRARY_DIRS})
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list(APPEND ${PRIVATE}_LINK_LIBRARIES ${${LIBRARY}_LINK})
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endforeach()
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endif()
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set(${MODULE}_INCLUDE_DIRS ${${PRIVATE}_INCLUDE_DIRS} PARENT_SCOPE)
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set(${MODULE}_LIBRARIES ${${PRIVATE}_LINK_LIBRARIES} PARENT_SCOPE)
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set(${MODULE}_VERSION ${${PRIVATE}_VERSION} PARENT_SCOPE)
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set(${MODULE}_FOUND ${${PRIVATE}_FOUND} PARENT_SCOPE)
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endfunction()
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# This macro's main purpose is to call find_package() with CONFIG and then with MODULE if it fails.
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# It also handles multiple package names and searches them with pkg-config if they are not found.
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macro(find_pkg ARG_ALIASES)
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# We specify "CONFIG", "MODULE" and "NO_MODULE" so that they are not considered unparsed arguments (passed to find_package()).
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cmake_parse_arguments(FIND_PACKAGE "ARG_ALIASES;CONFIG;MODULE;NO_DEFAULT_PATH;NO_MODULE;REQUIRED;QUIET" "" "COMPONENTS;OPTIONAL_COMPONENTS;PATHS" ${ARGN})
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if(FIND_PACKAGE_PATHS)
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list(APPEND FIND_PACKAGE_ARGUMENTS "PATHS" ${FIND_PACKAGE_PATHS})
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endif()
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if(FIND_PACKAGE_NO_DEFAULT_PATH)
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list(APPEND FIND_PACKAGE_ARGUMENTS "NO_DEFAULT_PATH")
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endif()
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# We add the aliases to a clean list because of an issue with list(GET).
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# If we pass the argument list directly to it, LAST_ALIAS is always set to "NOTFOUND".
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foreach(ALIAS ${ARG_ALIASES})
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list(APPEND ALIASES ${ALIAS})
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endforeach()
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list(REMOVE_DUPLICATES ALIASES)
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list(GET ALIASES -1 LAST_ALIAS)
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foreach(ALIAS ${ALIASES})
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set(NAME ${ALIAS})
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if(FIND_PACKAGE_COMPONENTS)
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foreach(COMPONENT ${FIND_PACKAGE_COMPONENTS})
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find_package(${NAME} COMPONENTS ${COMPONENT} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} CONFIG ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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if(NOT ${NAME}_FOUND)
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find_package(${NAME} COMPONENTS ${COMPONENT} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} MODULE ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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endif()
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if(NOT ${NAME}_FOUND)
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if(NOT ${NAME} STREQUAL ${LAST_ALIAS})
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break()
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else()
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if(FIND_PACKAGE_REQUIRED)
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message(FATAL_ERROR "${NAME} component not found: ${COMPONENT}")
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endif()
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if(NOT FIND_PACKAGE_QUIET)
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message(STATUS "${NAME} component not found: ${COMPONENT}")
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endif()
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break()
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endif()
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endif()
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if(NOT FIND_PACKAGE_QUIET)
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if(${NAME}_VERSION)
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find_package_message(${NAME} "${NAME} component found: ${COMPONENT} | Version: ${${NAME}_VERSION}" "[${NAME}][${COMPONENT}][${${NAME}_VERSION}]")
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else()
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find_package_message(${NAME} "${NAME} component found: ${COMPONENT}" "[${NAME}][${COMPONENT}]")
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endif()
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endif()
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endforeach()
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if(NOT ${NAME}_FOUND)
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continue()
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endif()
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else()
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find_package(${NAME} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} CONFIG ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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if(NOT ${NAME}_FOUND)
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find_package(${NAME} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} MODULE ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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if(NOT ${NAME}_FOUND)
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pkgconfig_search(${NAME})
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endif()
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endif()
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if(NOT ${NAME}_FOUND)
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if(NOT ${NAME} STREQUAL ${LAST_ALIAS})
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continue()
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else()
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if(FIND_PACKAGE_REQUIRED)
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message(FATAL_ERROR "${NAME} not found")
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endif()
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if(NOT FIND_PACKAGE_QUIET)
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message(STATUS "${NAME} not found")
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endif()
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break()
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endif()
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endif()
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if(NOT FIND_PACKAGE_QUIET)
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if(${NAME}_VERSION)
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find_package_message(${NAME} "${NAME} found | Version: ${${NAME}_VERSION}" "[${NAME}][${${NAME}_VERSION}]")
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else()
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find_package_message(${NAME} "${NAME} found" "[${NAME}]")
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endif()
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endif()
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endif()
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if(FIND_PACKAGE_OPTIONAL_COMPONENTS)
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foreach(COMPONENT ${FIND_PACKAGE_OPTIONAL_COMPONENTS})
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find_package(${NAME} COMPONENTS ${COMPONENT} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} CONFIG ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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if(NOT ${NAME}_FOUND)
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find_package(${NAME} COMPONENTS ${COMPONENT} ${FIND_PACKAGE_ARGUMENTS} ${QUIET_STR} MODULE ${FIND_PACKAGE_UNPARSED_ARGUMENTS})
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endif()
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if(${NAME}_FOUND AND NOT FIND_PACKAGE_QUIET)
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if(${NAME}_VERSION)
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find_package_message(${NAME} "${NAME} optional component found: ${COMPONENT} | Version: ${${NAME}_VERSION}" "[${NAME}][${COMPONENT}][${${NAME}_VERSION}]")
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else()
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find_package_message(${NAME} "${NAME} optional component found: ${COMPONENT}" "[${NAME}][${COMPONENT}]")
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endif()
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endif()
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endforeach()
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endif()
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if(${NAME}_FOUND)
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break()
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endif()
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endforeach()
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unset(LAST_ALIAS)
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unset(FIND_PACKAGE_ARGUMENTS)
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if(${NAME}_FOUND)
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if(NOT ${NAME}_VERSION OR NOT ${NAME}_LIBRARIES)
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# The FindOpenSSL module defines the variables with an uppercase prefix.
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string(TOUPPER ${NAME} NAME_UPPER)
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if(NOT ${NAME}_VERSION)
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set(${NAME}_VERSION ${${NAME_UPPER}_VERSION})
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endif()
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if(NOT ${NAME}_LIBRARIES)
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set(${NAME}_LIBRARIES ${${NAME_UPPER}_LIBRARIES})
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endif()
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unset(NAME_UPPER)
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endif()
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# If multiple capitalizations are searched for this will ensure that the
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# lowercase name of the library's variables are set as well.
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# Simplifying usage of find_pkg on case-insensitive file systems.
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string(TOLOWER ${NAME} NAME_LOWER)
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if(NOT ${NAME} STREQUAL NAME_LOWER AND ${NAME_LOWER} IN_LIST ALIASES)
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if(NOT ${NAME_LOWER}_VERSION)
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set(${NAME_LOWER}_VERSION ${${NAME}_VERSION})
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endif()
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if(NOT ${NAME_LOWER}_LIBRARIES)
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set(${NAME_LOWER}_LIBRARIES ${${NAME}_LIBRARIES})
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endif()
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if(NOT ${NAME_LOWER}_FOUND)
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set(${NAME_LOWER}_FOUND ${${NAME}_FOUND})
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endif()
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endif()
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unset(NAME_LOWER)
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elseif(NOT FIND_PACKAGE_QUIET)
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if(NOT PkgConfig_FOUND)
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message(WARNING "pkg-config was not found, consider installing it for better chances of finding a package")
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endif()
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endif()
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unset(ALIASES)
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unset(NAME)
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endmacro()
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# Uses pkg-config to obtain the value of a module variable
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# In contrast to standard cmake's pkg_get_variable, this function abstracts the
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# difference between pkg-config and pkgconf where one of them uses underscores in
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# the variable names, whereas the other does not. Thus, when provided with a
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# variable name that contains underscores and for which no value could be fetched,
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# the function will automatically check whether removing the underscores from the
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# variable name will yield a non-empty value and if this is the case, this value
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# will be returned.
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#
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# OUTPUT_VARIABLE <varName> Name of the output variable (Required)
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# MODULE <module> Name of the module to search for (Required)
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# VARIABLE_NAME <varName> Name of the variable to search for within the module (Required)
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# Note: This name should be the one containing underscores.
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# QUIET Don't print any status messages
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# REQUIRED Error, if no non-empty value could be retrieved
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# DEBUG Print status messages intended to debug this function
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function(get_pkgconf_variable)
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set(options QUIET REQUIRED DEBUG)
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set(oneValueArgs OUTPUT_VARIABLE MODULE VARIABLE_NAME)
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set(multiValueArgs)
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cmake_parse_arguments(GET_PKGCONF_VAR "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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# Handle required args
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set(REQUIRED_ARGS ${oneValueArgs})
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foreach(CURRENT IN LISTS REQUIRED_ARGS)
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if (NOT GET_PKGCONF_VAR_${CURRENT})
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message(FATAL_ERROR "get_pkgconf_variable: Missing mandatory parameter \"${CURRENT}\"")
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endif()
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endforeach()
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# Check that we have found pkg-config to begin with
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if(NOT PkgConfig_FOUND)
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message(FATAL_ERROR "get_pkgconf_variable: pkg-config was not found - can't use it to fetch variables")
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endif()
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pkg_search_module("${GET_PKGCONF_VAR_MODULE}" QUIET)
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if(NOT ${GET_PKGCONF_VAR_MODULE}_FOUND)
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if(GET_PKGCONF_VAR_DEBUG)
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message(STATUS "Unable to find module \"${GET_PKGCONF_VAR_MODULE}\" via pkg-conf")
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set(VAR_VALUE "NOTFOUND")
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endif()
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else()
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if(GET_PKGCONF_VAR_DEBUG)
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message(STATUS "get_pkgconf_variable: Searching for \"${GET_PKGCONF_VAR_VARIABLE_NAME}\" in module \"${GET_PKGCONF_VAR_MODULE}\"")
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endif()
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pkg_get_variable(VAR_VALUE "${GET_PKGCONF_VAR_MODULE}" "${GET_PKGCONF_VAR_VARIABLE_NAME}")
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if(NOT VAR_VALUE AND GET_PKGCONF_VAR_VARIABLE_NAME MATCHES ".*_.*")
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# There seems to be a difference between pkgconf and pkg-config where one uses underscores
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# in variable names, whereas the other does not. We assume that VAR_NAME is the version with
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# the underscores, so if that failed to fetch a value, we try again without the underscores.
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string(REPLACE "_" "" VAR_NAME_WITHOUT_UNDERSCORES "${GET_PKGCONF_VAR_VARIABLE_NAME}")
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if(GET_PKGCONF_VAR_DEBUG)
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message(STATUS "get_pkgconf_variable: Removed underscores from variable name")
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message(STATUS "get_pkgconf_variable: Now searching for variable \"${VAR_NAME_WITHOUT_UNDERSCORES}\"")
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endif()
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pkg_get_variable(VAR_VALUE "${GET_PKGCONF_VAR_MODULE}" "${VAR_NAME_WITHOUT_UNDERSCORES}")
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endif()
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endif()
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if(NOT VAR_VALUE)
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if(GET_PKGCONF_VAR_REQUIRED)
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message(FATAL_ERROR "get_pkgconf_variable: Failed to fetch \"${GET_PKGCONF_VAR_VARIABLE_NAME}\" of module \"${GET_PKGCONF_VAR_MODULE}\"")
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endif()
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if(NOT GET_PKGCONF_VAR_QUIET)
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message(WARNING "get_pkgconf_variable: Failed to fetch \"${GET_PKGCONF_VAR_VARIABLE_NAME}\" of module \"${GET_PKGCONF_VAR_MODULE}\"")
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endif()
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endif()
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if(GET_PKGCONF_VAR_DEBUG)
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message(STATUS "get_pkgconf_variable: Determined ${GET_PKGCONF_VAR_VARIABLE_NAME}=\"${VAR_VALUE}\"")
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endif()
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set(${GET_PKGCONF_VAR_OUTPUT_VARIABLE} "${VAR_VALUE}" PARENT_SCOPE)
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endfunction()
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