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CMake/Modules/CMakeParseImplicitLinkInfo.cmake
Robert Maynard b5f20da94d CMakeParseImplicitLinkInfo supports comma separated link lines 
It is currently presumed that the linker will generate
a space separated line. This is not the case for some
compilers such as IBM XL where it can output space or
comma separated. This is particularly apparent when IBM XL
is used as the host compiler for CUDA as it generates a comma
separated link line.
2019-08-28 10:39:53 -04:00

205 lines
8.5 KiB
CMake
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
cmake_policy(PUSH)
cmake_policy(SET CMP0053 NEW)
cmake_policy(SET CMP0054 NEW)
# 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 fwk_var log_var obj_regex)
set(implicit_libs_tmp "")
set(implicit_dirs_tmp)
set(implicit_fwks_tmp)
set(log "")
# Parse implicit linker arguments.
set(linker "CMAKE_LINKER-NOTFOUND")
if(CMAKE_LINKER)
get_filename_component(linker ${CMAKE_LINKER} NAME)
string(REGEX REPLACE "([][+.*?()^$])" "\\\\\\1" linker "${linker}")
endif()
set(startfile "CMAKE_LINK_STARTFILE-NOTFOUND")
if(CMAKE_LINK_STARTFILE)
set(startfile "${CMAKE_LINK_STARTFILE}")
endif()
# Construct a regex to match linker lines. It must match both the
# whole line and just the command (argv[0]).
set(linker_regex "^( *|.*[/\\])(${linker}|${startfile}|([^/\\]+-)?ld|collect2)[^/\\]*( |$)")
set(linker_exclude_regex "collect2 version |^[A-Za-z0-9_]+=|/ldfe ")
string(APPEND log " link line regex: [${linker_regex}]\n")
string(REGEX REPLACE "\r?\n" ";" output_lines "${text}")
foreach(line IN LISTS output_lines)
set(cmd)
if("${line}" MATCHES "${linker_regex}" AND
NOT "${line}" MATCHES "${linker_exclude_regex}")
if(XCODE)
# Xcode unconditionally adds a path under the project build tree and
# on older versions it is not reported with proper quotes. Remove it.
string(REGEX REPLACE "([][+.*()^])" "\\\\\\1" _dir_regex "${CMAKE_BINARY_DIR}")
string(REGEX REPLACE " -[FL]${_dir_regex}/([^ ]| [^-])+( |$)" " " xline "${line}")
if(NOT "x${xline}" STREQUAL "x${line}")
string(APPEND log " reduced line: [${line}]\n to: [${xline}]\n")
set(line "${xline}")
endif()
endif()
separate_arguments(args NATIVE_COMMAND "${line}")
list(GET args 0 cmd)
else()
#check to see if the link line is comma-separated instead of space separated
string(REGEX REPLACE "," " " line "${line}")
if("${line}" MATCHES "${linker_regex}" AND
NOT "${line}" MATCHES "${linker_exclude_regex}")
separate_arguments(args NATIVE_COMMAND "${line}")
list(GET args 0 cmd)
if("${cmd}" MATCHES "exec:")
# ibm xl sometimes has 'exec: ' in-front of the linker
list(GET args 1 cmd)
endif()
endif()
endif()
set(is_msvc 0)
if("${cmd}" MATCHES "${linker_regex}")
string(APPEND log " link line: [${line}]\n")
string(REGEX REPLACE ";-([LYz]);" ";-\\1" args "${args}")
set(skip_value_of "")
foreach(arg IN LISTS args)
if(skip_value_of)
string(APPEND log " arg [${arg}] ==> skip value of ${skip_value_of}\n")
set(skip_value_of "")
elseif("${arg}" MATCHES "^-L(.:)?[/\\]")
# Unix search path.
string(REGEX REPLACE "^-L" "" dir "${arg}")
list(APPEND implicit_dirs_tmp ${dir})
string(APPEND log " arg [${arg}] ==> dir [${dir}]\n")
elseif("${arg}" MATCHES "^[-/](LIBPATH|libpath):(.+)")
# MSVC search path.
set(dir "${CMAKE_MATCH_2}")
list(APPEND implicit_dirs_tmp ${dir})
string(APPEND log " arg [${arg}] ==> dir [${dir}]\n")
elseif(is_msvc AND "${arg}" STREQUAL "-link")
string(APPEND log " arg [${arg}] ==> ignore MSVC cl option\n")
elseif(is_msvc AND "${arg}" MATCHES "^(.*\\.[Ll][Ii][Bb])$")
set(lib "${CMAKE_MATCH_1}")
list(APPEND implicit_libs_tmp ${lib})
string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
elseif("${arg}" STREQUAL "-lto_library")
# ld argument "-lto_library <path>"
set(skip_value_of "${arg}")
string(APPEND log " arg [${arg}] ==> ignore, skip following value\n")
elseif("${arg}" MATCHES "^-l([^:].*)$")
# Unix library.
set(lib "${CMAKE_MATCH_1}")
list(APPEND implicit_libs_tmp ${lib})
string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.a$")
# Unix library full path.
list(APPEND implicit_libs_tmp ${arg})
string(APPEND log " arg [${arg}] ==> lib [${arg}]\n")
elseif("${arg}" MATCHES "^[-/](DEFAULTLIB|defaultlib):(.+)")
# Windows library.
set(lib "${CMAKE_MATCH_2}")
list(APPEND implicit_libs_tmp ${lib})
string(APPEND log " arg [${arg}] ==> lib [${lib}]\n")
elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.o$"
AND obj_regex AND "${arg}" MATCHES "${obj_regex}")
# Object file full path.
list(APPEND implicit_libs_tmp ${arg})
string(APPEND log " arg [${arg}] ==> obj [${arg}]\n")
elseif("${arg}" MATCHES "^-Y(P,)?[^0-9]")
# Sun search path ([^0-9] avoids conflict with Mac -Y<num>).
string(REGEX REPLACE "^-Y(P,)?" "" dirs "${arg}")
string(REPLACE ":" ";" dirs "${dirs}")
list(APPEND implicit_dirs_tmp ${dirs})
string(APPEND log " arg [${arg}] ==> dirs [${dirs}]\n")
elseif("${arg}" MATCHES "^-l:")
# HP named library.
list(APPEND implicit_libs_tmp ${arg})
string(APPEND log " arg [${arg}] ==> lib [${arg}]\n")
elseif("${arg}" MATCHES "^-z(all|default|weak)extract")
# Link editor option.
list(APPEND implicit_libs_tmp ${arg})
string(APPEND log " arg [${arg}] ==> opt [${arg}]\n")
elseif("${arg}" STREQUAL "cl.exe")
string(APPEND log " arg [${arg}] ==> recognize MSVC cl\n")
set(is_msvc 1)
else()
string(APPEND log " arg [${arg}] ==> ignore\n")
endif()
endforeach()
break()
elseif("${line}" MATCHES "LPATH(=| is:? *)(.*)$")
string(APPEND log " LPATH line: [${line}]\n")
# HP search path.
string(REPLACE ":" ";" paths "${CMAKE_MATCH_2}")
list(APPEND implicit_dirs_tmp ${paths})
string(APPEND log " dirs [${paths}]\n")
else()
string(APPEND log " ignore line: [${line}]\n")
endif()
endforeach()
# Look for library search paths reported by linker.
if("${output_lines}" MATCHES ";Library search paths:((;\t[^;]+)+)")
string(REPLACE ";\t" ";" implicit_dirs_match "${CMAKE_MATCH_1}")
string(APPEND log " Library search paths: [${implicit_dirs_match}]\n")
list(APPEND implicit_dirs_tmp ${implicit_dirs_match})
endif()
if("${output_lines}" MATCHES ";Framework search paths:((;\t[^;]+)+)")
string(REPLACE ";\t" ";" implicit_fwks_match "${CMAKE_MATCH_1}")
string(APPEND log " Framework search paths: [${implicit_fwks_match}]\n")
list(APPEND implicit_fwks_tmp ${implicit_fwks_match})
endif()
# Cleanup list of libraries and flags.
# We remove items that are not language-specific.
set(implicit_libs "")
foreach(lib IN LISTS implicit_libs_tmp)
if("x${lib}" MATCHES "^x(crt.*\\.o|gcc_eh.*|.*libgcc_eh.*|System.*|.*libclang_rt.*|msvcrt.*|libvcruntime.*|libucrt.*|libcmt.*)$")
string(APPEND log " remove lib [${lib}]\n")
elseif(IS_ABSOLUTE "${lib}")
get_filename_component(abs "${lib}" ABSOLUTE)
if(NOT "x${lib}" STREQUAL "x${abs}")
string(APPEND log " collapse lib [${lib}] ==> [${abs}]\n")
endif()
list(APPEND implicit_libs "${abs}")
else()
list(APPEND implicit_libs "${lib}")
endif()
endforeach()
# Cleanup list of library and framework directories.
set(desc_dirs "library")
set(desc_fwks "framework")
foreach(t dirs fwks)
set(implicit_${t} "")
foreach(d IN LISTS implicit_${t}_tmp)
get_filename_component(dir "${d}" ABSOLUTE)
string(FIND "${dir}" "${CMAKE_FILES_DIRECTORY}/" pos)
if(NOT pos LESS 0)
set(msg ", skipping non-system directory")
else()
set(msg "")
list(APPEND implicit_${t} "${dir}")
endif()
string(APPEND log " collapse ${desc_${t}} dir [${d}] ==> [${dir}]${msg}\n")
endforeach()
list(REMOVE_DUPLICATES implicit_${t})
endforeach()
# Log results.
string(APPEND log " implicit libs: [${implicit_libs}]\n")
string(APPEND log " implicit dirs: [${implicit_dirs}]\n")
string(APPEND log " implicit fwks: [${implicit_fwks}]\n")
# Return results.
set(${lib_var} "${implicit_libs}" PARENT_SCOPE)
set(${dir_var} "${implicit_dirs}" PARENT_SCOPE)
set(${fwk_var} "${implicit_fwks}" PARENT_SCOPE)
set(${log_var} "${log}" PARENT_SCOPE)
endfunction()
cmake_policy(POP)
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