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CMake/CompileFlags.cmake

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Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
2016-09-27 19:01:08 +00:00
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
Convert CMake to OSI-approved BSD License This converts the CMake license to a pure 3-clause OSI-approved BSD License. We drop the previous license clause requiring modified versions to be plainly marked. We also update the CMake copyright to cover the full development time range.
2009-09-28 15:43:28 +00:00
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
#-----------------------------------------------------------------------------
# set some special flags for different compilers
#
Avoid if() quoted auto-dereference When testing CMAKE_<LANG>_COMPILER_ID values, do not explicitly dereference or quote the variable. We want if() to auto-dereference the variable and not its value. Also replace MATCHES with STREQUAL where equivalent.
2014-10-14 14:25:32 +00:00
if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Intel")
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
set(_INTEL_WINDOWS 1)
endif()
Re-disable MSVC CRT deprecation warnings The commit "Disable Intel CRT deprecation warnings" broke the logic that disabled MS's CRT deprecation warnings. This fixes the logic to disable the warnings for both MSVC and Intel.
2009-10-28 12:42:20 +00:00
Fixing warnings generated by clang 8.0 on Windows * Deprecation removals previously specific to MSVC/Intel now also used by clang * String literals were assigned to non const pointers. These are stored in mutable arrays now * An implicit function pointer to pointer conversion is a Microsoft extension warning is suppressed by an explicit reinterpret_cast * The MSVC specific deprecation macro for jsoncpp was moved after the clang macro to avoid redefinition warnings. This is consistent with how jsoncpp fixed the issue in 36d8cfd7
2019-05-29 16:03:34 +00:00
if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Clang"
AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
set(_CLANG_MSVC_WINDOWS 1)
endif()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
# Disable deprecation warnings for standard C functions.
ENH: first pass at VS 10, can bootstrap CMake, but many tests still fail
2009-06-25 20:41:57 +00:00
# really only needed for newer versions of VS, but should
Remove trailing whitespace from most CMake and C/C++ code Our Git commit hooks disallow modification or addition of lines with trailing whitespace. Wipe out all remnants of trailing whitespace everywhere except third-party code. Run the following shell code: git ls-files -z -- \ bootstrap doxygen.config '*.readme' \ '*.c' '*.cmake' '*.cpp' '*.cxx' \ '*.el' '*.f' '*.f90' '*.h' '*.in' '*.in.l' '*.java' \ '*.mm' '*.pike' '*.py' '*.txt' '*.vim' | egrep -z -v '^(Utilities/cm|Source/(kwsys|CursesDialog/form)/)' | egrep -z -v '^(Modules/CPack\..*\.in)' | xargs -0 sed -i 's/ \+$//'
2012-08-13 17:42:58 +00:00
# not hurt other versions, and this will work into the
ENH: first pass at VS 10, can bootstrap CMake, but many tests still fail
2009-06-25 20:41:57 +00:00
# future
Fixing warnings generated by clang 8.0 on Windows * Deprecation removals previously specific to MSVC/Intel now also used by clang * String literals were assigned to non const pointers. These are stored in mutable arrays now * An implicit function pointer to pointer conversion is a Microsoft extension warning is suppressed by an explicit reinterpret_cast * The MSVC specific deprecation macro for jsoncpp was moved after the clang macro to avoid redefinition warnings. This is consistent with how jsoncpp fixed the issue in 36d8cfd7
2019-05-29 16:03:34 +00:00
if(MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
else()
endif()
Windows: Increase stack size used by CMake binaries Deep regex matching logic can exceed the default 1MB stack size. Until a better regex engine is used, simply push the problem over a farther horizon by increasing the stack size when built using a MSVC-compatible linker. Issue: #17659
2018-01-30 19:37:23 +00:00
if(MSVC)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
endif()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
Fixing warnings generated by clang 8.0 on Windows * Deprecation removals previously specific to MSVC/Intel now also used by clang * String literals were assigned to non const pointers. These are stored in mutable arrays now * An implicit function pointer to pointer conversion is a Microsoft extension warning is suppressed by an explicit reinterpret_cast * The MSVC specific deprecation macro for jsoncpp was moved after the clang macro to avoid redefinition warnings. This is consistent with how jsoncpp fixed the issue in 36d8cfd7
2019-05-29 16:03:34 +00:00
if(_CLANG_MSVC_WINDOWS AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
cmake: use correct stack size with gnu mode clang on windows
2019-02-20 11:19:58 +00:00
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
endif()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
#silence duplicate symbol warnings on AIX
Use CMAKE_SYSTEM_NAME instead of CMAKE_SYSTEM where sufficient
2014-04-11 16:27:01 +00:00
if(CMAKE_SYSTEM_NAME MATCHES "AIX")
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
if(NOT CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -bhalt:5 ")
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif()
endif()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
Remove .* expressions from beginning and end of MATCHES regexs All these expressions work the same: "foo" ".*foo.*" "^.*foo.*$" This assumes that the "Intel*" expressions were meant to be "Intel.*".
2014-04-11 16:17:46 +00:00
if(CMAKE_SYSTEM MATCHES "OSF1-V")
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
if(NOT CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -timplicit_local -no_implicit_include ")
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif()
endif()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
Workaround for short jump tables on PA-RISC. The PA-RISC architecture requires special options for GCC to prevent linker errors when libraries reach a certain size and / or complexity. See http://mraw.org/blog/2007/10/10/Linking_on_hppa and gcc documentation on -mlong-calls.
2014-11-04 16:01:56 +00:00
# Workaround for short jump tables on PA-RISC
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc")
Modules: Fix typos in name of `CMAKE_COMPILER_IS_GNUCC` variable It is not called `CMAKE_COMPILER_IS_GNUC` (without last `C`). Closes: #16297
2016-09-14 14:11:43 +00:00
if(CMAKE_COMPILER_IS_GNUCC)
Workaround for short jump tables on PA-RISC. The PA-RISC architecture requires special options for GCC to prevent linker errors when libraries reach a certain size and / or complexity. See http://mraw.org/blog/2007/10/10/Linking_on_hppa and gcc documentation on -mlong-calls.
2014-11-04 16:01:56 +00:00
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mlong-calls")
endif()
if(CMAKE_COMPILER_IS_GNUCXX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mlong-calls")
endif()
endif()
ppc64: Work around TOC overflow with platform specific linker flags
2019-02-27 17:31:57 +00:00
# Workaround for TOC Overflow on ppc64
if(CMAKE_SYSTEM_NAME STREQUAL "AIX" AND
CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-bbigtoc")
elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND
CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-multi-toc")
endif()
SunPro: update flags used for CMake itself Special flags should no longer be required when CMake is built with a recent version of CMake.
2017-05-22 21:28:51 +00:00
if (CMAKE_CXX_COMPILER_ID STREQUAL SunPro AND
NOT DEFINED CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION)
SolarisStudio: Use alternative standard library to build CMake. SolarisStudio ships a very old RogueWave standard library implementation (libCstd) and uses it by default for backward compatibility. The macros defined when building the system libCstd need to be the same as the macros defined when using it for binary compatibility reasons etc. The SolarisStudio compiler driver adds macros such as _RWSTD_NO_MEMBER_TEMPLATES and _RWSTD_NO_CLASS_PARTIAL_SPEC etc. These macros disable certain APIs in the standard library headers. Although the compiler supports the features 'member templates' and 'partial template specialization', the standard library does not provide APIs which rely on those features. This means that std::vector::insert in libCStd does not accept a pair of iterators from a different type of container, because that requires member templates, and reverse_iterator<const T> can not be constructed from a reverse_iterator<T> because that requires partial specialization (or at least the _RWSTD_NO_CLASS_PARTIAL_SPEC define) and member templates. This causes many problems while building CMake using SolarisStudio, which have not been well understood until now. The problems are usually attributed to compiler limitations, while actually the problem is in the standard library, as in commit v3.0.0-rc1~99^2~1 (Help: Document non-use of std::set::insert., 2014-01-24) and commit 107dcac3 (Fix compilation with the Oracle / Sun compiler (#15318), 2014-12-12). SolarisStudio 12.3 and earlier also ships a version of stlport which may be used instead of libCstd by specifying -library=stlport4 https://docs.oracle.com/cd/E18659_01/html/821-1383/bkakg.html SolarisStudio 12.4 ships a version of libstdc++ from GCC 4.8.2 which may be used by specifying -std=c++03 or -std=c++11 etc http://docs.oracle.com/cd/E37069_01/html/E37075/bkamw.html#OSSCPgnaof Use these more-capable standard library implementations when building cmake. This will allow more use of 'normal' C++ (such as std::vector::insert), and cause fewer surprises resulting from dashboards using SolarisStudio. Because cmake is not a library linked against by 3rd parties and does not have external dependencies, issues related to mixing code using libCStd and libstdc++ do not apply.
2014-12-31 11:23:50 +00:00
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13)
Update SunPro flags used for CMake itself to support C++11
2017-05-08 14:26:54 +00:00
if (NOT CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD EQUAL 98)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
elseif(CMAKE_VERSION VERSION_LESS 3.8.20170502)
# CMake knows how to add this flag for compilation as C++11,
# but has not been taught that SunPro needs it for linking too.
# Add it in a place that will be used for both.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
endif()
SolarisStudio: Use alternative standard library to build CMake. SolarisStudio ships a very old RogueWave standard library implementation (libCstd) and uses it by default for backward compatibility. The macros defined when building the system libCstd need to be the same as the macros defined when using it for binary compatibility reasons etc. The SolarisStudio compiler driver adds macros such as _RWSTD_NO_MEMBER_TEMPLATES and _RWSTD_NO_CLASS_PARTIAL_SPEC etc. These macros disable certain APIs in the standard library headers. Although the compiler supports the features 'member templates' and 'partial template specialization', the standard library does not provide APIs which rely on those features. This means that std::vector::insert in libCStd does not accept a pair of iterators from a different type of container, because that requires member templates, and reverse_iterator<const T> can not be constructed from a reverse_iterator<T> because that requires partial specialization (or at least the _RWSTD_NO_CLASS_PARTIAL_SPEC define) and member templates. This causes many problems while building CMake using SolarisStudio, which have not been well understood until now. The problems are usually attributed to compiler limitations, while actually the problem is in the standard library, as in commit v3.0.0-rc1~99^2~1 (Help: Document non-use of std::set::insert., 2014-01-24) and commit 107dcac3 (Fix compilation with the Oracle / Sun compiler (#15318), 2014-12-12). SolarisStudio 12.3 and earlier also ships a version of stlport which may be used instead of libCstd by specifying -library=stlport4 https://docs.oracle.com/cd/E18659_01/html/821-1383/bkakg.html SolarisStudio 12.4 ships a version of libstdc++ from GCC 4.8.2 which may be used by specifying -std=c++03 or -std=c++11 etc http://docs.oracle.com/cd/E37069_01/html/E37075/bkamw.html#OSSCPgnaof Use these more-capable standard library implementations when building cmake. This will allow more use of 'normal' C++ (such as std::vector::insert), and cause fewer surprises resulting from dashboards using SolarisStudio. Because cmake is not a library linked against by 3rd parties and does not have external dependencies, issues related to mixing code using libCStd and libstdc++ do not apply.
2014-12-31 11:23:50 +00:00
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -library=stlport4")
endif()
endif()
CompileFlags: Tell PGI compiler not to issue warning diagnostics When hosting CMake's own build with the PGI compiler there are several warnings that cannot easily be fixed or suppressed. We have enough code quality tools and warnings from other compilers that it is unlikely a PGI-only warning is useful.
2016-09-28 20:03:14 +00:00
foreach(lang C CXX)
# Suppress warnings from PGI compiler.
if (CMAKE_${lang}_COMPILER_ID STREQUAL "PGI")
set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -w")
endif()
endforeach()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
# use the ansi CXX compile flag for building cmake
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
if (CMAKE_ANSI_CXXFLAGS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_ANSI_CXXFLAGS}")
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif ()
ENH: start trying to cleanup CMakeLists files
2007-05-10 18:08:15 +00:00
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
if (CMAKE_ANSI_CFLAGS)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif ()
CMake: Enable /MP for MSVC toolchain A new cache option named `CMake_MSVC_PARALLEL` is now available that can be used to control the usage of [`/MP`][1] to the MSVC compiler. This enables parallelized builds on a per-translation unit basis. To enable `/MP`, specify value `ON` to the option. Using an integral non-zero value will control the specific number of threads used with the `/MP` option, as opposed to letting the toolchain decide for you. Fixes #17696 [1]: https://docs.microsoft.com/en-us/cpp/build/reference/mp-build-with-multiple-processes
2018-01-29 17:34:28 +00:00
# Allow per-translation-unit parallel builds when using MSVC
if(CMAKE_GENERATOR MATCHES "Visual Studio" AND
(CMAKE_C_COMPILER_ID MATCHES "MSVC|Intel" OR
CMAKE_CXX_COMPILER_ID MATCHES "MSVC|Intel"))
set(CMake_MSVC_PARALLEL ON CACHE STRING "\
Enables /MP flag for parallel builds using MSVC. Specify an \
integer value to control the number of threads used (Only \
works on some older versions of Visual Studio). Setting to \
ON lets the toolchain decide how many threads to use. Set to \
OFF to disable /MP completely." )
if(CMake_MSVC_PARALLEL)
if(CMake_MSVC_PARALLEL GREATER 0)
string(APPEND CMAKE_C_FLAGS " /MP${CMake_MSVC_PARALLEL}")
string(APPEND CMAKE_CXX_FLAGS " /MP${CMake_MSVC_PARALLEL}")
else()
string(APPEND CMAKE_C_FLAGS " /MP")
string(APPEND CMAKE_CXX_FLAGS " /MP")
endif()
endif()
endif()
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