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This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
72 lines
2.4 KiB
CMake
72 lines
2.4 KiB
CMake
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# Function parse implicit linker options.
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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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function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var)
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set(implicit_libs "")
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set(implicit_dirs_tmp)
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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 ${CMAKE_LINKER} NAME)
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endif()
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set(linker_regex "/(${linker}|ld|collect2)")
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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 "${linker_regex}")
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if(UNIX)
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separate_arguments(args UNIX_COMMAND "${line}")
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else()
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separate_arguments(args WINDOWS_COMMAND "${line}")
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endif()
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list(GET args 0 cmd)
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endif()
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if("${cmd}" MATCHES "${linker_regex}")
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string(REGEX REPLACE ";-([LY]);" ";-\\1" args "${args}")
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foreach(arg IN LISTS args)
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if("${arg}" MATCHES "^-L(.:)?[/\\]")
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# Unix search path.
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string(REGEX REPLACE "^-L" "" dir "${arg}")
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list(APPEND implicit_dirs_tmp ${dir})
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elseif("${arg}" MATCHES "^-l[^:]")
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# Unix library.
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string(REGEX REPLACE "^-l" "" lib "${arg}")
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list(APPEND implicit_libs ${lib})
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elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.a$")
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# Unix library full path.
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list(APPEND implicit_libs ${arg})
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elseif("${arg}" MATCHES "^-Y(P,)?")
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# Sun search path.
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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 ${dirs})
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elseif("${arg}" MATCHES "^-l:")
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# HP named library.
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list(APPEND implicit_libs ${arg})
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endif()
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endforeach()
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break()
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elseif("${line}" MATCHES "LPATH(=| is:? )")
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# HP search path.
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string(REGEX REPLACE ".*LPATH(=| is:? *)" "" paths "${line}")
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string(REPLACE ":" ";" paths "${paths}")
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list(APPEND implicit_dirs_tmp ${paths})
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endif()
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endforeach()
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# Cleanup list of directories.
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set(implicit_dirs "")
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foreach(d IN LISTS implicit_dirs_tmp)
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get_filename_component(dir "${d}" ABSOLUTE)
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list(APPEND implicit_dirs "${dir}")
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endforeach()
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list(REMOVE_DUPLICATES implicit_dirs)
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# Return results.
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set(${lib_var} "${implicit_libs}" PARENT_SCOPE)
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set(${dir_var} "${implicit_dirs}" PARENT_SCOPE)
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endfunction()
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