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CMake/Modules/CMakeParseImplicitLinkInfo.cmake

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ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 15:46:51 +00:00
#=============================================================================
# Copyright 2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
Modules: Fix spelling 'To distributed' -> 'To distribute'
2010-08-07 00:48:47 +00:00
# (To distribute this file outside of CMake, substitute the full
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 15:46:51 +00:00
# License text for the above reference.)
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
# Function parse implicit linker options.
# This is used internally by CMake and should not be included by user
# code.
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var fwk_var log_var obj_regex)
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
set(implicit_libs_tmp "")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
set(implicit_dirs_tmp)
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
set(implicit_fwks_tmp)
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
# Parse implicit linker arguments.
set(linker "CMAKE_LINKER-NOTFOUND")
if(CMAKE_LINKER)
get_filename_component(linker ${CMAKE_LINKER} NAME)
Sanitize linker name to parse implicit link line (#14154) Teach CMakeParseImplicitLinkInfo to convert the CMAKE_LINKER file name to a regular expression that matches only the original name. Escape special characters like '+' so they are not treated as regex syntax. Extend the ImplicitLinkInfoTest to test handling of a CMAKE_LINKER value with many special characters.
2013-05-17 12:42:07 +00:00
string(REGEX REPLACE "([][+.*?()^$])" "\\\\\\1" linker "${linker}")
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
endif()
More robust implicit link line detection regex The regex used by CMAKE_PARSE_IMPLICIT_LINK_INFO to detect link lines should not match lines that happen to have ".../ld.../..." in them. A linker name should match only as the last component of a path. See issue #9666.
2009-10-07 12:43:51 +00:00
# Construct a regex to match linker lines. It must match both the
# whole line and just the command (argv[0]).
Recognize ld with toolchain prefix (#13960) Teach CMAKE_PARSE_IMPLICIT_LINK_INFO to recognize linker invocations of the form "<toolchain-prefix>-ld" e.g. "x86_64-pc-linux-gnu-ld".
2013-02-27 20:33:39 +00:00
set(linker_regex "^( *|.*[/\\])(${linker}|([^/\\]+-)?ld|collect2)[^/\\]*( |$)")
Absoft: Detect implicit link libraries on Linux and Mac Use the "-X -v" flag to the Absoft front-end to pass "-v" to the gcc it invokes under the hood. Teach CMakeParseImplicitLinkInfo to exclude linker version lines from consideration as link lines. Fix parsing of Sun's linker search path option "-Y..." to avoid conflict with the Mac linker option "-Y<num>".
2011-01-24 16:18:18 +00:00
set(linker_exclude_regex "collect2 version ")
Log implicit link line detection regex This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log the regex it uses to detect the linker invocation line. The regex is computed from the CMAKE_LINKER if it is found, so it might change. A strange value might match the wrong line and cause implicit link info extraction to fail. See issue #9666.
2009-10-06 20:31:43 +00:00
set(log "${log} link line regex: [${linker_regex}]\n")
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
string(REGEX REPLACE "\r?\n" ";" output_lines "${text}")
foreach(line IN LISTS output_lines)
set(cmd)
Absoft: Detect implicit link libraries on Linux and Mac Use the "-X -v" flag to the Absoft front-end to pass "-v" to the gcc it invokes under the hood. Teach CMakeParseImplicitLinkInfo to exclude linker version lines from consideration as link lines. Fix parsing of Sun's linker search path option "-Y..." to avoid conflict with the Mac linker option "-Y<num>".
2011-01-24 16:18:18 +00:00
if("${line}" MATCHES "${linker_regex}" AND
NOT "${line}" MATCHES "${linker_exclude_regex}")
OS X: Detect implicit link directories on modern toolchains We detect the implicit link directories for the toolchain by adding a flag to get verbose output from the compiler front-end while linking the ABI detection binary. Newer OS X toolchains based on Clang do not add the implicit link directories with -L options to their internal invocation of "ld". Instead they use a linker that comes with the toolchain and is already configured with the proper directories. Add the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays them in a block such as: Library search paths: /... Parse this block to extract the implicit link directories. While at it, remove the checks introduced by commit efaf335b (Skip implicit link information on Xcode, 2009-07-23) and commit 5195a664 (Skip implicit link info for multiple OS X archs, 2009-09-22). Discard the non-system link directories added by Xcode. Discard all detected implicit libraries in the multi-architecture case but keep the directories. The directories are still useful without the libraries just to suppress addition of explicit -L options for them.
2012-12-05 16:49:13 +00:00
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}")
set(log "${log} reduced line: [${line}]\n to: [${xline}]\n")
set(line "${xline}")
endif()
endif()
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
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}")
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} link line: [${line}]\n")
BUG: Parse implicit link editor -z*extract options The Sun Fortran compiler passes -zallextract and -zdefaultextract to the linker so that all objects from one of its archives are included in the link. This teaches the implicit options parser to recognize the flags. We need to pass them explicitly on C++ link lines when Fortran code is linked.
2009-07-28 12:36:11 +00:00
string(REGEX REPLACE ";-([LYz]);" ";-\\1" args "${args}")
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
foreach(arg IN LISTS args)
if("${arg}" MATCHES "^-L(.:)?[/\\]")
# Unix search path.
string(REGEX REPLACE "^-L" "" dir "${arg}")
list(APPEND implicit_dirs_tmp ${dir})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> dir [${dir}]\n")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
elseif("${arg}" MATCHES "^-l[^:]")
# Unix library.
string(REGEX REPLACE "^-l" "" lib "${arg}")
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
list(APPEND implicit_libs_tmp ${lib})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> lib [${lib}]\n")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.a$")
# Unix library full path.
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
list(APPEND implicit_libs_tmp ${arg})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> lib [${arg}]\n")
Detect object files in implicit link information The NAG Fortran compiler implicitly passes object files by full path to the linker. Teach CMakeParseImplicitLinkInfo to parse object files that match some tool-specific regular expression.
2010-12-09 22:07:34 +00:00
elseif("${arg}" MATCHES "^(.:)?[/\\].*\\.o$"
AND obj_regex AND "${arg}" MATCHES "${obj_regex}")
# Object file full path.
list(APPEND implicit_libs_tmp ${arg})
set(log "${log} arg [${arg}] ==> obj [${arg}]\n")
Absoft: Detect implicit link libraries on Linux and Mac Use the "-X -v" flag to the Absoft front-end to pass "-v" to the gcc it invokes under the hood. Teach CMakeParseImplicitLinkInfo to exclude linker version lines from consideration as link lines. Fix parsing of Sun's linker search path option "-Y..." to avoid conflict with the Mac linker option "-Y<num>".
2011-01-24 16:18:18 +00:00
elseif("${arg}" MATCHES "^-Y(P,)?[^0-9]")
# Sun search path ([^0-9] avoids conflict with Mac -Y<num>).
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
string(REGEX REPLACE "^-Y(P,)?" "" dirs "${arg}")
string(REPLACE ":" ";" dirs "${dirs}")
list(APPEND implicit_dirs_tmp ${dirs})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> dirs [${dirs}]\n")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
elseif("${arg}" MATCHES "^-l:")
# HP named library.
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
list(APPEND implicit_libs_tmp ${arg})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> lib [${arg}]\n")
BUG: Parse implicit link editor -z*extract options The Sun Fortran compiler passes -zallextract and -zdefaultextract to the linker so that all objects from one of its archives are included in the link. This teaches the implicit options parser to recognize the flags. We need to pass them explicitly on C++ link lines when Fortran code is linked.
2009-07-28 12:36:11 +00:00
elseif("${arg}" MATCHES "^-z(all|default|weak)extract")
# Link editor option.
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
list(APPEND implicit_libs_tmp ${arg})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} arg [${arg}] ==> opt [${arg}]\n")
else()
set(log "${log} arg [${arg}] ==> ignore\n")
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
endif()
endforeach()
break()
elseif("${line}" MATCHES "LPATH(=| is:? )")
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} LPATH line: [${line}]\n")
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
# HP search path.
string(REGEX REPLACE ".*LPATH(=| is:? *)" "" paths "${line}")
string(REPLACE ":" ";" paths "${paths}")
list(APPEND implicit_dirs_tmp ${paths})
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(log "${log} dirs [${paths}]\n")
else()
set(log "${log} ignore line: [${line}]\n")
ENH: Implicit link info for C, CXX, and Fortran This teaches CMake to detect implicit link information for C, C++, and Fortran compilers. We detect the implicit linker search directories and implicit linker options for UNIX-like environments using verbose output from compiler front-ends. We store results in new variables called CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES The implicit libraries can contain linker flags as well as library names.
2009-07-23 14:07:25 +00:00
endif()
endforeach()
OS X: Detect implicit link directories on modern toolchains We detect the implicit link directories for the toolchain by adding a flag to get verbose output from the compiler front-end while linking the ABI detection binary. Newer OS X toolchains based on Clang do not add the implicit link directories with -L options to their internal invocation of "ld". Instead they use a linker that comes with the toolchain and is already configured with the proper directories. Add the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays them in a block such as: Library search paths: /... Parse this block to extract the implicit link directories. While at it, remove the checks introduced by commit efaf335b (Skip implicit link information on Xcode, 2009-07-23) and commit 5195a664 (Skip implicit link info for multiple OS X archs, 2009-09-22). Discard the non-system link directories added by Xcode. Discard all detected implicit libraries in the multi-architecture case but keep the directories. The directories are still useful without the libraries just to suppress addition of explicit -L options for them.
2012-12-05 16:49:13 +00:00
# Look for library search paths reported by linker.
if("${output_lines}" MATCHES ";Library search paths:((;\t[^;]+)+)")
string(REPLACE ";\t" ";" implicit_dirs_match "${CMAKE_MATCH_1}")
set(log "${log} Library search paths: [${implicit_dirs_match}]\n")
list(APPEND implicit_dirs_tmp ${implicit_dirs_match})
endif()
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
if("${output_lines}" MATCHES ";Framework search paths:((;\t[^;]+)+)")
string(REPLACE ";\t" ";" implicit_fwks_match "${CMAKE_MATCH_1}")
set(log "${log} Framework search paths: [${implicit_fwks_match}]\n")
list(APPEND implicit_fwks_tmp ${implicit_fwks_match})
endif()
OS X: Detect implicit link directories on modern toolchains We detect the implicit link directories for the toolchain by adding a flag to get verbose output from the compiler front-end while linking the ABI detection binary. Newer OS X toolchains based on Clang do not add the implicit link directories with -L options to their internal invocation of "ld". Instead they use a linker that comes with the toolchain and is already configured with the proper directories. Add the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays them in a block such as: Library search paths: /... Parse this block to extract the implicit link directories. While at it, remove the checks introduced by commit efaf335b (Skip implicit link information on Xcode, 2009-07-23) and commit 5195a664 (Skip implicit link info for multiple OS X archs, 2009-09-22). Discard the non-system link directories added by Xcode. Discard all detected implicit libraries in the multi-architecture case but keep the directories. The directories are still useful without the libraries just to suppress addition of explicit -L options for them.
2012-12-05 16:49:13 +00:00
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
# Cleanup list of libraries and flags.
# We remove items that are not language-specific.
set(implicit_libs "")
foreach(lib IN LISTS implicit_libs_tmp)
if("${lib}" MATCHES "^(crt.*\\.o|gcc.*|System.*)$")
set(log "${log} remove lib [${lib}]\n")
Normalize full paths in implicit link library list Teach CMakeParseImplicitLinkInfo to convert implicit link library full paths to a canonical form. This makes them more reproducible in case different language compiler front-ends add the same library by different paths e.g. ".../libA.a" and "...//libA.a". Add a case to the CMake.ImplicitLinkInfo test to cover removal of extra slashes from both library and directory paths.
2013-02-06 21:21:11 +00:00
elseif(IS_ABSOLUTE "${lib}")
get_filename_component(abs "${lib}" ABSOLUTE)
if(NOT "x${lib}" STREQUAL "x${abs}")
set(log "${log} collapse lib [${lib}] ==> [${abs}]\n")
endif()
list(APPEND implicit_libs "${abs}")
Remove non-language implicit link dependencies Some compilers use implicit link options of the form -lcrt*.o -lgcc* -lSystem (on Mac) -lSystemStubs (on Mac) that provide system-wide symbols not specific to any language. These need not be listed explicitly for mixed-language linking. We teach CMake to remove the above items from the implicit library list of each language. This change makes it possible to mix GNU compiler versions in some cases.
2009-11-05 17:17:08 +00:00
else()
list(APPEND implicit_libs "${lib}")
endif()
endforeach()
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
# 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} "${dir}")
endif()
set(log "${log} collapse ${desc_${t}} dir [${d}] ==> [${dir}]${msg}\n")
endforeach()
list(REMOVE_DUPLICATES implicit_${t})
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
endforeach()
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
# Log results.
set(log "${log} implicit libs: [${implicit_libs}]\n")
set(log "${log} implicit dirs: [${implicit_dirs}]\n")
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
set(log "${log} implicit fwks: [${implicit_fwks}]\n")
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
# Return results.
set(${lib_var} "${implicit_libs}" PARENT_SCOPE)
set(${dir_var} "${implicit_dirs}" PARENT_SCOPE)
OS X: Detect implicit linker framework search paths Previously we hard-coded a list of implicit framework directories but did not account for CMAKE_OSX_SYSROOT or for changes to the list across OS X versions. Instead we should automatically detect the framework directories for the active toolchain. The parent commit added the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays a block such as: Framework search paths: /... Parse this block to extract the list of framework directories. Detection may fail on toolchains that do not list their framework directories, such as older OS X linkers. Always treat the paths <sdk>/Library/Frameworks <sdk>/System/Library/Frameworks <sdk>/Network/Library/Frameworks # Older OS X only /System/Library/Frameworks as implicit. Note that /System/Library/Frameworks should always be considered implicit so that frameworks CMake finds there will not override the SDK copies.
2012-12-05 18:46:04 +00:00
set(${fwk_var} "${implicit_fwks}" PARENT_SCOPE)
Log implicit link information parsing actions This commit teaches the CMAKE_PARSE_IMPLICIT_LINK_INFO function to log its actions. We store the log in CMakeFiles/CMakeOutput.log at the top of the project build tree. This will make diagnosis of implicit link information parsing problems easier.
2009-10-06 19:16:12 +00:00
set(${log_var} "${log}" PARENT_SCOPE)
ENH: Implicit link info for C, CXX, and Fortran 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.
2009-07-23 14:07:25 +00:00
endfunction()
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