function(vcpkg_check_linkage) cmake_parse_arguments(PARSE_ARGV 0 arg "ONLY_STATIC_LIBRARY;ONLY_DYNAMIC_LIBRARY;ONLY_DYNAMIC_CRT;ONLY_STATIC_CRT" "" "" ) if(DEFINED arg_UNPARSED_ARGUMENTS) message(WARNING "${CMAKE_CURRENT_FUNCTION} was passed extra arguments: ${arg_UNPARSED_ARGUMENTS}") endif() if(arg_ONLY_STATIC_LIBRARY AND arg_ONLY_DYNAMIC_LIBRARY) message(FATAL_ERROR "Requesting both ONLY_STATIC_LIBRARY and ONLY_DYNAMIC_LIBRARY; this is an error.") endif() if(arg_ONLY_STATIC_CRT AND arg_ONLY_DYNAMIC_CRT) message(FATAL_ERROR "Requesting both ONLY_STATIC_CRT and ONLY_DYNAMIC_CRT; this is an error.") endif() if(arg_ONLY_STATIC_LIBRARY AND "${VCPKG_LIBRARY_LINKAGE}" STREQUAL "dynamic") message(STATUS "Note: ${PORT} only supports static library linkage. Building static library.") set(VCPKG_LIBRARY_LINKAGE static PARENT_SCOPE) elseif(arg_ONLY_DYNAMIC_LIBRARY AND "${VCPKG_LIBRARY_LINKAGE}" STREQUAL "static") if("${VCPKG_CRT_LINKAGE}" STREQUAL "static") message(FATAL_ERROR "This port can only build as a dynamic library, but the triplet \ selects a static library and a static CRT. Building a dynamic library with a static CRT creates \ conditions many developers find surprising, and for which most ports are unprepared. Therefore, \ vcpkg fails rather than changing VCPKG_LIBRARY_LINKAGE to dynamic.\ Consider choosing a triplet that sets VCPKG_CRT_LINKAGE to dynamic. For more information, \ explicitly requesting this configuration in a custom triplet, please see \ https://learn.microsoft.com/vcpkg/maintainers/functions/vcpkg_check_linkage?WT.mc_id=vcpkg_inproduct_cli#notes \ If you can edit the port calling vcpkg_check_linkage that emits this message, consider adding \ !(static & staticcrt) to the \"supports\" expression so that this combination can fail early.") else() message(STATUS "Note: ${PORT} only supports dynamic library linkage. Building dynamic library.") endif() set(VCPKG_LIBRARY_LINKAGE dynamic PARENT_SCOPE) endif() if(arg_ONLY_DYNAMIC_CRT AND "${VCPKG_CRT_LINKAGE}" STREQUAL "static") message(FATAL_ERROR "${PORT} only supports dynamic crt linkage") elseif(arg_ONLY_STATIC_CRT AND "${VCPKG_CRT_LINKAGE}" STREQUAL "dynamic") message(FATAL_ERROR "${PORT} only supports static crt linkage") endif() endfunction()