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287 lines
12 KiB
287 lines
12 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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cmake_policy(PUSH)
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cmake_policy(SET CMP0053 NEW)
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cmake_policy(SET CMP0054 NEW)
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# Function to parse implicit linker options.
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#
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# This is used internally by CMake and should not be included by user
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# code.
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#
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# Note: this function is leaked/exposed by FindOpenMP and therefore needs
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# to have a stable API so projects that copied `FindOpenMP` for backwards
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# compatibility don't break.
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#
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function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var fwk_var log_var obj_regex)
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set(implicit_libs_tmp "")
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set(implicit_objs_tmp "")
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set(implicit_dirs_tmp)
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set(implicit_fwks_tmp)
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set(log "")
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set(keywordArgs)
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set(oneValueArgs COMPUTE_IMPLICIT_OBJECTS LANGUAGE)
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set(multiValueArgs )
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cmake_parse_arguments(EXTRA_PARSE "${keywordArgs}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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set(is_msvc 0)
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if(EXTRA_PARSE_LANGUAGE AND
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("x${CMAKE_${EXTRA_PARSE_LANGUAGE}_ID}" STREQUAL "xMSVC" OR
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"x${CMAKE_${EXTRA_PARSE_LANGUAGE}_SIMULATE_ID}" STREQUAL "xMSVC"))
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set(is_msvc 1)
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endif()
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# Parse implicit linker arguments.
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set(linker "CMAKE_LINKER-NOTFOUND")
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if(CMAKE_LINKER)
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get_filename_component(linker ${CMAKE_LINKER} NAME)
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string(REGEX REPLACE "([][+.*?()^$])" "\\\\\\1" linker "${linker}")
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endif()
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if(is_msvc)
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string(APPEND linker "|link\\.exe|lld-link")
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endif()
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set(startfile "CMAKE_LINK_STARTFILE-NOTFOUND")
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if(CMAKE_LINK_STARTFILE)
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set(startfile "${CMAKE_LINK_STARTFILE}")
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endif()
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# Construct a regex to match linker lines. It must match both the
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# whole line and just the command (argv[0]).
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set(linker_regex "^( *|.*[/\\])(${linker}|${startfile}|([^/\\]+-)?ld|collect2)[^/\\]*( |$)")
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set(linker_exclude_regex "collect2 version |^[A-Za-z0-9_]+=|/ldfe ")
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string(APPEND log " link line regex: [${linker_regex}]\n")
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string(REGEX REPLACE "\r?\n" ";" output_lines "${text}")
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foreach(line IN LISTS output_lines)
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set(cmd)
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if("${line}" MATCHES "${linker_regex}" AND
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NOT "${line}" MATCHES "${linker_exclude_regex}")
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if(XCODE)
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# Xcode unconditionally adds a path under the project build tree and
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# on older versions it is not reported with proper quotes. Remove it.
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string(REGEX REPLACE "([][+.*()^])" "\\\\\\1" _dir_regex "${CMAKE_BINARY_DIR}")
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string(REGEX REPLACE " -[FL]${_dir_regex}/([^ ]| [^-])+( |$)" " " xline "${line}")
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if(NOT "x${xline}" STREQUAL "x${line}")
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string(APPEND log " reduced line: [${line}]\n to: [${xline}]\n")
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set(line "${xline}")
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endif()
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endif()
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separate_arguments(args NATIVE_COMMAND "${line}")
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list(GET args 0 cmd)
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if("${cmd}" MATCHES "->")
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# LCC has '-> ' in-front of the linker
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list(GET args 1 cmd)
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endif()
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else()
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#check to see if the link line is comma-separated instead of space separated
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string(REGEX REPLACE "," " " line "${line}")
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if("${line}" MATCHES "${linker_regex}" AND
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NOT "${line}" MATCHES "${linker_exclude_regex}")
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separate_arguments(args NATIVE_COMMAND "${line}")
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list(GET args 0 cmd)
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if("${cmd}" MATCHES "exec:")
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# ibm xl sometimes has 'exec: ' in-front of the linker
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list(GET args 1 cmd)
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endif()
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endif()
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endif()
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set(search_static 0)
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if("${cmd}" MATCHES "${linker_regex}")
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string(APPEND log " link line: [${line}]\n")
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string(REGEX REPLACE ";-([LYz]);" ";-\\1" args "${args}")
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set(skip_value_of "")
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foreach(arg IN LISTS args)
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if(skip_value_of)
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string(APPEND log " arg [${arg}] ==> skip value of ${skip_value_of}\n")
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set(skip_value_of "")
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elseif("${arg}" MATCHES "^-L(.:)?[/\\]")
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# Unix search path.
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string(REGEX REPLACE "^-L" "" dir "${arg}")
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list(APPEND implicit_dirs_tmp ${dir})
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string(APPEND log " arg [${arg}] ==> dir [${dir}]\n")
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elseif("${arg}" MATCHES "^[-/](LIBPATH|libpath):(.+)")
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# MSVC search path.
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set(dir "${CMAKE_MATCH_2}")
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list(APPEND implicit_dirs_tmp ${dir})
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string(APPEND log " arg [${arg}] ==> dir [${dir}]\n")
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elseif(is_msvc AND "${arg}" STREQUAL "-link")
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string(APPEND log " arg [${arg}] ==> ignore MSVC cl option\n")
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elseif(is_msvc AND "${arg}" MATCHES "^[-/][Ii][Mm][Pp][Ll][Ii][Bb]:")
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string(APPEND log " arg [${arg}] ==> ignore MSVC link option\n")
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elseif(is_msvc AND "${arg}" MATCHES "^(.*\\.[Ll][Ii][Bb])$")
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set(lib "${CMAKE_MATCH_1}")
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list(APPEND implicit_libs_tmp ${lib})
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string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
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elseif("${arg}" STREQUAL "-lto_library")
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# ld argument "-lto_library <path>"
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set(skip_value_of "${arg}")
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string(APPEND log " arg [${arg}] ==> ignore, skip following value\n")
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elseif("${arg}" MATCHES "^-l([^:].*)$")
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# Unix library.
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set(lib "${CMAKE_MATCH_1}")
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if(search_static AND lib MATCHES "^(gfortran|stdc\\+\\+)$")
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# Search for the static library later, once all link dirs are known.
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set(lib "SEARCH_STATIC:${lib}")
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endif()
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list(APPEND implicit_libs_tmp ${lib})
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string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
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elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.a$")
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# Unix library full path.
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list(APPEND implicit_libs_tmp ${arg})
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string(APPEND log " arg [${arg}] ==> lib [${arg}]\n")
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elseif("${arg}" MATCHES "^[-/](DEFAULTLIB|defaultlib):(.+)")
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# Windows library.
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set(lib "${CMAKE_MATCH_2}")
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list(APPEND implicit_libs_tmp ${lib})
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string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
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elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.o$")
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if(EXTRA_PARSE_COMPUTE_IMPLICIT_OBJECTS)
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list(APPEND implicit_objs_tmp ${arg})
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string(APPEND log " arg [${arg}] ==> obj [${arg}]\n")
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endif()
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if(obj_regex AND "${arg}" MATCHES "${obj_regex}")
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# Object file full path.
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list(APPEND implicit_libs_tmp ${arg})
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endif()
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elseif("${arg}" MATCHES "^-Y(P,)?[^0-9]")
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# Sun search path ([^0-9] avoids conflict with Mac -Y<num>).
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string(REGEX REPLACE "^-Y(P,)?" "" dirs "${arg}")
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string(REPLACE ":" ";" dirs "${dirs}")
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list(APPEND implicit_dirs_tmp ${dirs})
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string(APPEND log " arg [${arg}] ==> dirs [${dirs}]\n")
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elseif("${arg}" STREQUAL "-Bstatic")
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set(search_static 1)
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string(APPEND log " arg [${arg}] ==> search static\n" )
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elseif("${arg}" STREQUAL "-Bdynamic")
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set(search_static 0)
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string(APPEND log " arg [${arg}] ==> search dynamic\n" )
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elseif("${arg}" MATCHES "^-l:")
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# HP named library.
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list(APPEND implicit_libs_tmp ${arg})
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string(APPEND log " arg [${arg}] ==> lib [${arg}]\n")
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elseif("${arg}" MATCHES "^-z(all|default|weak)extract")
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# Link editor option.
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list(APPEND implicit_libs_tmp ${arg})
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string(APPEND log " arg [${arg}] ==> opt [${arg}]\n")
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elseif("${arg}" STREQUAL "cl.exe")
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string(APPEND log " arg [${arg}] ==> recognize MSVC cl\n")
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set(is_msvc 1)
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else()
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string(APPEND log " arg [${arg}] ==> ignore\n")
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endif()
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endforeach()
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break()
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elseif("${line}" MATCHES "LPATH(=| is:? *)(.*)$")
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string(APPEND log " LPATH line: [${line}]\n")
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# HP search path.
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string(REPLACE ":" ";" paths "${CMAKE_MATCH_2}")
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list(APPEND implicit_dirs_tmp ${paths})
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string(APPEND log " dirs [${paths}]\n")
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else()
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string(APPEND log " ignore line: [${line}]\n")
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endif()
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endforeach()
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# Look for library search paths reported by linker.
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if("${output_lines}" MATCHES ";Library search paths:((;\t[^;]+)+)")
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string(REPLACE ";\t" ";" implicit_dirs_match "${CMAKE_MATCH_1}")
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string(APPEND log " Library search paths: [${implicit_dirs_match}]\n")
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list(APPEND implicit_dirs_tmp ${implicit_dirs_match})
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endif()
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if("${output_lines}" MATCHES ";Framework search paths:((;\t[^;]+)+)")
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string(REPLACE ";\t" ";" implicit_fwks_match "${CMAKE_MATCH_1}")
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string(APPEND log " Framework search paths: [${implicit_fwks_match}]\n")
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list(APPEND implicit_fwks_tmp ${implicit_fwks_match})
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endif()
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# Cleanup list of libraries and flags.
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# We remove items that are not language-specific.
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set(implicit_libs "")
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foreach(lib IN LISTS implicit_libs_tmp)
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if("x${lib}" MATCHES "^xSEARCH_STATIC:(.*)")
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set(search_static 1)
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set(lib "${CMAKE_MATCH_1}")
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else()
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set(search_static 0)
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endif()
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if("x${lib}" MATCHES "^x(crt.*\\.o|gcc_eh.*|.*libgcc_eh.*|System.*|.*libclang_rt.*|msvcrt.*|libvcruntime.*|libucrt.*|libcmt.*)$")
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string(APPEND log " remove lib [${lib}]\n")
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elseif(search_static)
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# This library appears after a -Bstatic flag. Due to ordering
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# and filtering for mixed-language link lines, we do not preserve
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# the -Bstatic flag itself. Instead, use an absolute path.
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# Search using a temporary variable with a distinct name
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# so that our test suite does not depend on disk content.
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find_library("CMAKE_${lang}_IMPLICIT_LINK_LIBRARY_${lib}" NO_CACHE NAMES "lib${lib}.a" NO_DEFAULT_PATH PATHS ${implicit_dirs_tmp})
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set(_lib_static "${CMAKE_${lang}_IMPLICIT_LINK_LIBRARY_${lib}}")
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if(_lib_static)
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string(APPEND log " search lib [SEARCH_STATIC:${lib}] ==> [${_lib_static}]\n")
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list(APPEND implicit_libs "${_lib_static}")
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else()
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string(APPEND log " search lib [SEARCH_STATIC:${lib}] ==> [${lib}]\n")
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list(APPEND implicit_libs "${lib}")
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endif()
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elseif(IS_ABSOLUTE "${lib}")
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get_filename_component(abs "${lib}" ABSOLUTE)
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if(NOT "x${lib}" STREQUAL "x${abs}")
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string(APPEND log " collapse lib [${lib}] ==> [${abs}]\n")
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endif()
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list(APPEND implicit_libs "${abs}")
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else()
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list(APPEND implicit_libs "${lib}")
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endif()
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endforeach()
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if(EXTRA_PARSE_COMPUTE_IMPLICIT_OBJECTS)
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set(implicit_objs "")
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foreach(obj IN LISTS implicit_objs_tmp)
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if(IS_ABSOLUTE "${obj}")
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get_filename_component(abs "${obj}" ABSOLUTE)
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if(NOT "x${obj}" STREQUAL "x${abs}")
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string(APPEND log " collapse obj [${obj}] ==> [${abs}]\n")
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endif()
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list(APPEND implicit_objs "${abs}")
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else()
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list(APPEND implicit_objs "${obj}")
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endif()
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endforeach()
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endif()
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# Cleanup list of library and framework directories.
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set(desc_dirs "library")
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set(desc_fwks "framework")
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foreach(t dirs fwks)
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set(implicit_${t} "")
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foreach(d IN LISTS implicit_${t}_tmp)
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get_filename_component(dir "${d}" ABSOLUTE)
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string(FIND "${dir}" "${CMAKE_FILES_DIRECTORY}/" pos)
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if(NOT pos LESS 0)
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set(msg ", skipping non-system directory")
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else()
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set(msg "")
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list(APPEND implicit_${t} "${dir}")
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endif()
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string(APPEND log " collapse ${desc_${t}} dir [${d}] ==> [${dir}]${msg}\n")
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endforeach()
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list(REMOVE_DUPLICATES implicit_${t})
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endforeach()
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# Log results.
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string(APPEND log " implicit libs: [${implicit_libs}]\n")
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string(APPEND log " implicit objs: [${implicit_objs}]\n")
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string(APPEND log " implicit dirs: [${implicit_dirs}]\n")
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string(APPEND log " implicit fwks: [${implicit_fwks}]\n")
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# Return results.
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set(${lib_var} "${implicit_libs}" PARENT_SCOPE)
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set(${dir_var} "${implicit_dirs}" PARENT_SCOPE)
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set(${fwk_var} "${implicit_fwks}" PARENT_SCOPE)
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set(${log_var} "${log}" PARENT_SCOPE)
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if(EXTRA_PARSE_COMPUTE_IMPLICIT_OBJECTS)
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set(${EXTRA_PARSE_COMPUTE_IMPLICIT_OBJECTS} "${implicit_objs}" PARENT_SCOPE)
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endif()
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endfunction()
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cmake_policy(POP)
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