CMake/Modules/CMakeParseImplicitLinkInfo....

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# Function parse implicit linker options.
# This is used internally by CMake and should not be included by user
# code.
function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var)
set(implicit_libs "")
set(implicit_dirs_tmp)
# Parse implicit linker arguments.
set(linker "CMAKE_LINKER-NOTFOUND")
if(CMAKE_LINKER)
get_filename_component(linker ${CMAKE_LINKER} NAME)
endif()
set(linker_regex "^( *|.*/)(${linker}|ld|collect2)")
string(REGEX REPLACE "\r?\n" ";" output_lines "${text}")
foreach(line IN LISTS output_lines)
set(cmd)
if("${line}" MATCHES "${linker_regex}")
if(UNIX)
separate_arguments(args UNIX_COMMAND "${line}")
else()
separate_arguments(args WINDOWS_COMMAND "${line}")
endif()
list(GET args 0 cmd)
endif()
if("${cmd}" MATCHES "${linker_regex}")
string(REGEX REPLACE ";-([LYz]);" ";-\\1" args "${args}")
foreach(arg IN LISTS args)
if("${arg}" MATCHES "^-L(.:)?[/\\]")
# Unix search path.
string(REGEX REPLACE "^-L" "" dir "${arg}")
list(APPEND implicit_dirs_tmp ${dir})
elseif("${arg}" MATCHES "^-l[^:]")
# Unix library.
string(REGEX REPLACE "^-l" "" lib "${arg}")
list(APPEND implicit_libs ${lib})
elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.a$")
# Unix library full path.
list(APPEND implicit_libs ${arg})
elseif("${arg}" MATCHES "^-Y(P,)?")
# Sun search path.
string(REGEX REPLACE "^-Y(P,)?" "" dirs "${arg}")
string(REPLACE ":" ";" dirs "${dirs}")
list(APPEND implicit_dirs_tmp ${dirs})
elseif("${arg}" MATCHES "^-l:")
# HP named library.
list(APPEND implicit_libs ${arg})
elseif("${arg}" MATCHES "^-z(all|default|weak)extract")
# Link editor option.
list(APPEND implicit_libs ${arg})
endif()
endforeach()
break()
elseif("${line}" MATCHES "LPATH(=| is:? )")
# HP search path.
string(REGEX REPLACE ".*LPATH(=| is:? *)" "" paths "${line}")
string(REPLACE ":" ";" paths "${paths}")
list(APPEND implicit_dirs_tmp ${paths})
endif()
endforeach()
# Cleanup list of directories.
set(implicit_dirs "")
foreach(d IN LISTS implicit_dirs_tmp)
get_filename_component(dir "${d}" ABSOLUTE)
list(APPEND implicit_dirs "${dir}")
endforeach()
list(REMOVE_DUPLICATES implicit_dirs)
# Return results.
set(${lib_var} "${implicit_libs}" PARENT_SCOPE)
set(${dir_var} "${implicit_dirs}" PARENT_SCOPE)
endfunction()