96 lines
4.2 KiB
CMake
96 lines
4.2 KiB
CMake
# like add_library(new ALIAS old) but avoids add_library cannot create ALIAS target "new" because target "old" is imported but not globally visible. on older cmake
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# This can be replaced with a direct alias call once our minimum is cmake 3.18
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function(dolphin_alias_library new old)
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string(REPLACE "::" "" library_no_namespace ${old})
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if (NOT TARGET _alias_${library_no_namespace})
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add_library(_alias_${library_no_namespace} INTERFACE)
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target_link_libraries(_alias_${library_no_namespace} INTERFACE ${old})
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endif()
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add_library(${new} ALIAS _alias_${library_no_namespace})
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endfunction()
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# Makes an imported target if it doesn't exist. Useful for when find scripts from older versions of cmake don't make the targets you need
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function(dolphin_make_imported_target_if_missing target lib)
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if(${lib}_FOUND AND NOT TARGET ${target})
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add_library(_${lib} INTERFACE)
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target_link_libraries(_${lib} INTERFACE "${${lib}_LIBRARIES}")
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target_include_directories(_${lib} INTERFACE "${${lib}_INCLUDE_DIRS}")
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add_library(${target} ALIAS _${lib})
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endif()
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endfunction()
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function(dolphin_optional_system_library library)
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string(TOUPPER ${library} upperlib)
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set(USE_SYSTEM_${upperlib} "" CACHE STRING "Use system ${library} instead of bundled. ON - Always use system and fail if unavailable, OFF - Always use bundled, AUTO - Use system if available, otherwise use bundled, blank - Delegate to USE_SYSTEM_LIBS. Default is blank.")
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if("${USE_SYSTEM_${upperlib}}" STREQUAL "")
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if(APPROVED_VENDORED_DEPENDENCIES)
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string(TOLOWER ${library} lowerlib)
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if(lowerlib IN_LIST APPROVED_VENDORED_DEPENDENCIES)
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set(RESOLVED_USE_SYSTEM_${upperlib} AUTO PARENT_SCOPE)
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else()
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set(RESOLVED_USE_SYSTEM_${upperlib} ON PARENT_SCOPE)
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endif()
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else()
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set(RESOLVED_USE_SYSTEM_${upperlib} ${USE_SYSTEM_LIBS} PARENT_SCOPE)
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endif()
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else()
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set(RESOLVED_USE_SYSTEM_${upperlib} ${USE_SYSTEM_${upperlib}} PARENT_SCOPE)
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endif()
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endfunction()
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function(dolphin_add_bundled_library library bundled_path)
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string(TOUPPER ${library} upperlib)
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if (${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO")
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message(STATUS "No system ${library} was found. Using static ${library} from Externals.")
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else()
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message(STATUS "Using static ${library} from Externals")
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endif()
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if (NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${bundled_path}/CMakeLists.txt")
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message(FATAL_ERROR "No bundled ${library} was found. Did you forget to checkout submodules?")
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endif()
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add_subdirectory(${bundled_path} EXCLUDE_FROM_ALL)
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endfunction()
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function(dolphin_find_optional_system_library library bundled_path)
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dolphin_optional_system_library(${library})
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string(TOUPPER ${library} upperlib)
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if(RESOLVED_USE_SYSTEM_${upperlib})
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find_package(${library} ${ARGN})
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# Yay for cmake packages being inconsistent
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if(DEFINED ${library}_FOUND)
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set(prefix ${library})
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else()
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set(prefix ${upperlib})
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endif()
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if((NOT ${found}) AND (NOT ${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO"))
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message(FATAL_ERROR "No system ${library} was found. Please install it or set USE_SYSTEM_${upperlib} to AUTO or OFF.")
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endif()
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endif()
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if(${prefix}_FOUND)
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message(STATUS "Using system ${library}")
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set(${prefix}_TYPE "System" PARENT_SCOPE)
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else()
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dolphin_add_bundled_library(${library} ${bundled_path})
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set(${prefix}_TYPE "Bundled" PARENT_SCOPE)
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endif()
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endfunction()
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function(dolphin_find_optional_system_library_pkgconfig library search alias bundled_path)
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dolphin_optional_system_library(${library})
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string(TOUPPER ${library} upperlib)
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if(RESOLVED_USE_SYSTEM_${upperlib})
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pkg_search_module(${library} ${search} ${ARGN} IMPORTED_TARGET)
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if((NOT ${library}_FOUND) AND (NOT ${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO"))
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message(FATAL_ERROR "No system ${library} was found. Please install it or set USE_SYSTEM_${upperlib} to AUTO or OFF.")
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endif()
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endif()
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if(${library}_FOUND)
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message(STATUS "Using system ${library}")
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dolphin_alias_library(${alias} PkgConfig::${library})
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set(${library}_TYPE "System" PARENT_SCOPE)
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else()
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dolphin_add_bundled_library(${library} ${bundled_path})
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set(${library}_TYPE "Bundled" PARENT_SCOPE)
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endif()
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endfunction()
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