CMake 3.1-rc2 is now ready!
I am proud to announce the CMake 3.1 second release candidate.
Sources and binaries are available at:
http://www.cmake.org/files/v3.1/?C=M;O=D
Documentation is available at:
http://www.cmake.org/cmake/help/v3.1
Release notes appear below and are also published at
http://www.cmake.org/cmake/help/v3.1/release/3.1.0.html
Some of the more significant features of CMake 3.1 are:
* Windows Phone and Windows Store support has been added to Visual Studio 11
(2012) and above Generators.
* NVIDIA Nsight Tegra support has been added to Visual Studio 10 (2010) and
above Generators.
* New "target_compile_features" command allows populating target based compile
features. CMake uses this information to ensure that the compiler in use is
capable of building the target, and to add any necessary compile flags
such as -std=gnu++11 to support language features.
More information on this is found at:
– http://www.cmake.org/cmake/help/v3.1/manual/cmake-compile-features.7.html
* The syntax for *Variable References* and *Escape Sequences* was simplified in
order to allow a much faster implementation. See policy "CMP0053".
* The "if" command no longer automatically dereferences variables named in
quoted or bracket arguments. See policy "CMP0054".
* The target property "SOURCES" now generally supports "Generator Expressions".
The generator expressions may be used in the "add_library" and
"add_executable" commands.
* It is now possible to write and append to the target property "SOURCES".
The variable "CMAKE_DEBUG_TARGET_PROPERTIES" can be used to trace the
origin of sources.
* CPack gained "7Z" and "TXZ" generators supporting lzma-compressed archives.
* The ExternalProject module has learned to support lzma-compressed
source tarballs with ".7z", ".tar.xz", and ".txz" extensions.
* The ExternalProject module ExternalProject_Add command learned a new
BUILD_ALWAYS option to cause the external project build step to run every
time the host project is built.
* The ctest_coverage command learned to support Intel coverage files with the
"codecov" tool.
* The ctest_memcheck command learned to support sanitizer modes, including
"AddressSanitizer", "MemorySanitizer", "ThreadSanitizer", and
"UndefinedBehaviorSanitizer".
Deprecated and Removed Features:
* In CMake 3.0 the "target_link_libraries" command accidentally began allowing
unquoted arguments to use Generator Expressions containing a semicolon
separated list within them. For example:
set(libs B C)
target_link_libraries(A PUBLIC $<BUILD_INTERFACE:${libs}>)
This is equivalent to writing:
target_link_libraries(A PUBLIC $<BUILD_INTERFACE:B C>)
and was never intended to work. It did not work in CMake 2.8.12.
Such generator expressions should be in quoted arguments:
set(libs B C)
target_link_libraries(A PUBLIC "$<BUILD_INTERFACE:${libs}>")
CMake 3.1 again requires the quotes for this to work correctly.
CMake 3.1.0 Release Notes
*************************
Changes made since CMake 3.0.0 include the following.
Documentation Changes
=====================
* A new "cmake-compile-features(7)" manual was added.
New Features
============
Generators
———-
* A "Visual Studio 14" generator was added.
Windows Phone and Windows Store
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Generators for Visual Studio 11 (2012) and above learned to
generate projects for Windows Phone and Windows Store. One may set
the "CMAKE_SYSTEM_NAME" variable to "WindowsPhone" or "WindowsStore"
on the "cmake(1)" command-line or in a "CMAKE_TOOLCHAIN_FILE" to
activate these platforms. Also set "CMAKE_SYSTEM_VERSION" to "8.0"
or "8.1" to specify the version of Windows to be targeted.
NVIDIA Nsight Tegra
~~~~~~~~~~~~~~~~~~~
* Generators for Visual Studio 10 (2010) and above learned to
generate projects for NVIDIA Nsight Tegra Visual Studio Edition.
One may set the "CMAKE_SYSTEM_NAME" variable to "Android" on the
"cmake(1)" command-line or in a "CMAKE_TOOLCHAIN_FILE" to activate
this platform.
Syntax
——
* The "cmake-language(7)" syntax for *Variable References* and
*Escape Sequences* was simplified in order to allow a much faster
implementation. See policy "CMP0053".
* The "if()" command no longer automatically dereferences variables
named in quoted or bracket arguments. See policy "CMP0054".
Commands
——–
* The "add_custom_command()" command learned to interpret "cmake-
generator-expressions(7)" in arguments to "DEPENDS".
* The "export(PACKAGE)" command learned to check the
"CMAKE_EXPORT_NO_PACKAGE_REGISTRY" variable to skip exporting the
package.
* The "file(STRINGS)" command gained a new "ENCODING" option to
enable extraction of "UTF-8" strings.
* The "find_package()" command learned to check the
"CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY" and
"CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY" variables to skip
searching the package registries.
* The "install()" command learned a "MESSAGE_NEVER" option to avoid
output during installation.
* The "string()" command learned a new "GENEX_STRIP" subcommand
which removes "generator expression".
* The "string()" command learned a new "UUID" subcommand to generate
a univerally unique identifier.
* New "target_compile_features()" command allows populating the
"COMPILE_FEATURES" target property, just like any other build
variable.
* The "target_sources()" command was added to add to the "SOURCES"
target property.
Variables
———
* The Visual Studio generators for versions 8 (2005) and above
learned to read the target platform name from a new
"CMAKE_GENERATOR_PLATFORM" variable when it is not specified as part
of the generator name. The platform name may be specified on the
"cmake(1)" command line with the "-A" option, e.g. "-G "Visual
Studio 12 2013" -A x64".
* The "CMAKE_GENERATOR_TOOLSET" variable may now be initialized in a
toolchain file specified by the "CMAKE_TOOLCHAIN_FILE" variable.
This is useful when cross-compiling with the Xcode or Visual Studio
generators.
* The "CMAKE_INSTALL_MESSAGE" variable was introduced to optionally
reduce output installation.
Properties
———-
* New "CXX_STANDARD" and "CXX_EXTENSIONS" target properties may
specify values which CMake uses to compute required compile options
such as "-std=c++11" or "-std=gnu++11". The "CMAKE_CXX_STANDARD" and
"CMAKE_CXX_EXTENSIONS" variables may be set to initialize the target
properties.
* New "C_STANDARD" and "C_EXTENSIONS" target properties may specify
values which CMake uses to compute required compile options such as
"-std=c11" or "-std=gnu11". The "CMAKE_C_STANDARD" and
"CMAKE_C_EXTENSIONS" variables may be set to initialize the target
properties.
* New "COMPILE_FEATURES" target property may contain a list of
features required to compile a target. CMake uses this information
to ensure that the compiler in use is capable of building the
target, and to add any necessary compile flags to support language
features.
* New "COMPILE_PDB_NAME" and "COMPILE_PDB_OUTPUT_DIRECTORY" target
properties were introduced to specify the MSVC compiler program
database file location ("cl /Fd"). This complements the existing
"PDB_NAME" and "PDB_OUTPUT_DIRECTORY" target properties that specify
the linker program database file location ("link /pdb").
* The "INTERFACE_LINK_LIBRARIES" target property now supports a
"$<LINK_ONLY:…>" "generator expression".
* A new "INTERFACE_SOURCES" target property was introduced. This is
consumed by dependent targets, which compile and link the listed
sources.
* The "SOURCES" target property now contains "generator expression"
such as "TARGET_OBJECTS" when read at configure time, if policy
"CMP0051" is "NEW".
* The "SOURCES" target property now generally supports "generator
expression". The generator expressions may be used in the
"add_library()" and "add_executable()" commands.
* It is now possible to write and append to the "SOURCES" target
property. The "CMAKE_DEBUG_TARGET_PROPERTIES" variable may be used
to trace the origin of sources.
* A "VS_DEPLOYMENT_CONTENT" source file property was added to tell
the Visual Studio generators to mark content for deployment in
Windows Phone and Windows Store projects.
* The "VS_WINRT_COMPONENT" target property was created to tell
Visual Studio generators to compile a shared library as a Windows
Runtime (WinRT) component.
* The "Xcode" generator learned to check source file properties
"XCODE_EXPLICIT_FILE_TYPE" and "XCODE_LAST_KNOWN_FILE_TYPE" for a
custom Xcode file reference type.
Modules
——-
* The "BundleUtilities" module learned to resolve and replace
"@rpath" placeholders on OS X to correctly bundle applications using
them.
* The "CMakePackageConfigHelpers" module
"configure_package_config_file()" command learned a new
"INSTALL_PREFIX" option to generate package configuration files
meant for a prefix other than "CMAKE_INSTALL_PREFIX".
* The "CheckFortranSourceCompiles" module was added to provide a
"CHECK_Fortran_SOURCE_COMPILES" macro.
* The "ExternalData" module learned to tolerate a "DATA{}" reference
to a missing source file with a warning instead of rejecting it with
an error. This helps developers write new "DATA{}" references to
test reference outputs that have not yet been created.
* The "ExternalProject" module learned to support lzma-compressed
source tarballs with ".7z", ".tar.xz", and ".txz" extensions.
* The "ExternalProject" module "ExternalProject_Add" command learned
a new "BUILD_ALWAYS" option to cause the external project build step
to run every time the host project is built.
* The "ExternalProject" module "ExternalProject_Add" command learned
a new "EXCLUDE_FROM_ALL" option to cause the external project target
to have the "EXCLUDE_FROM_ALL" target property set.
* The "ExternalProject" module "ExternalProject_Add_Step" command
learned a new "EXCLUDE_FROM_MAIN" option to cause the step to not be
a direct dependency of the main external project target.
* The "ExternalProject" module "ExternalProject_Add" command learned
a new "DOWNLOAD_NO_PROGRESS" option to disable progress output while
downloading the source tarball.
* The "FeatureSummary" module "feature_summary" API learned to
accept multiple values for the "WHAT" option and combine them
appropriately.
* The "FindCUDA" module learned to support "fatbin" and "cubin"
modules.
* The "FindGTest" module "gtest_add_tests" macro learned a new
"AUTO" option to automatically read the "SOURCES" target property of
the test executable and scan the source files for tests to be added.
* The "FindGLEW" module now provides imported targets.
* The "FindGLUT" module now provides imported targets.
* The "FindHg" module gained a new "Hg_WC_INFO" macro to help run
"hg" to extract information about a Mercurial work copy.
* The "FindOpenCL" module was introduced.
* The "FindOpenGL" module now provides imported targets "OpenGL::GL"
and "OpenGL::GLU" when the libraries are found.
* The "FindOpenMP" module learned to support Fortran.
* The "FindPkgConfig" module learned to use the "PKG_CONFIG"
environment variable value as the "pkg-config" executable, if set.
* The "FindZLIB" module now provides imported targets.
* The "GenerateExportHeader" module "generate_export_header"
function learned to allow use with *Object Libraries*.
* The "InstallRequiredSystemLibraries" module gained a new
"CMAKE_INSTALL_OPENMP_LIBRARIES" option to install MSVC OpenMP
runtime libraries.
* The "UseSWIG" module learned to detect the module name from ".i"
source files if possible to avoid the need to set the
"SWIG_MODULE_NAME" source file property explicitly.
* The "WriteCompilerDetectionHeader" module was added to allow
creation of a portable header file for compiler optional feature
detection.
Generator Expressions
———————
* New "COMPILE_FEATURES" "generator expression" allows setting build
properties based on available compiler features.
CTest
—–
* The "ctest_coverage()" command learned to read variable
"CTEST_COVERAGE_EXTRA_FLAGS" to set "CoverageExtraFlags".
* The "ctest_coverage()" command learned to support Intel coverage
files with the "codecov" tool.
* The "ctest_memcheck()" command learned to support sanitizer modes,
including "AddressSanitizer", "MemorySanitizer", "ThreadSanitizer",
and "UndefinedBehaviorSanitizer". Options may be set using the new
"CTEST_MEMORYCHECK_SANITIZER_OPTIONS" variable.
CPack
—–
* "cpack(1)" gained an "IFW" generator to package using Qt Framework
Installer tools. See the "CPackIFW" module.
* "cpack(1)" gained "7Z" and "TXZ" generators supporting lzma-
compressed archives.
* The "CPackDeb" module learned a new
"CPACK_DEBIAN_COMPRESSION_TYPE" variable to set the tarball
compression type.
* The "cpack(1)" "WiX" generator learned to support a
"CPACK_WIX_ACL" installed file property to specify an Access Control
List.
Other
—–
* The "cmake(1)" "-E" option learned a new "env" command.
* The "cmake(1)" "-E tar" command learned to support lzma-compressed
files.
* *Object Libraries* may now have extra sources that do not compile
to object files so long as they would not affect linking of a normal
library (e.g. ".dat" is okay but not ".def").
* Visual Studio generators for VS 8 and later learned to support the
"ASM_MASM" language.
* The Visual Studio generators learned to treat ".hlsl" source files
as High Level Shading Language sources (using "FXCompile" in
".vcxproj" files). A "VS_SHADER_TYPE" source file property was
added to specify the Shader Type.
New Diagnostics
===============
* Policy "CMP0052" introduced to control directories in the
"INTERFACE_INCLUDE_DIRECTORIES" of exported targets.
Deprecated and Removed Features
===============================
* In CMake 3.0 the "target_link_libraries()" command accidentally
began allowing unquoted arguments to use "generator expressions"
containing a (";" separated) list within them. For example:
set(libs B C)
target_link_libraries(A PUBLIC $<BUILD_INTERFACE:${libs}>)
This is equivalent to writing:
target_link_libraries(A PUBLIC $<BUILD_INTERFACE:B C>)
and was never intended to work. It did not work in CMake 2.8.12.
Such generator expressions should be in quoted arguments:
set(libs B C)
target_link_libraries(A PUBLIC "$<BUILD_INTERFACE:${libs}>")
CMake 3.1 again requires the quotes for this to work correctly.
* Callbacks established by the "variable_watch()" command will no
longer receive the "ALLOWED_UNKNOWN_READ_ACCESS" access type when
the undocumented "CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS" variable
is set. Uninitialized variable accesses will always be reported as
"UNKNOWN_READ_ACCESS".
* The "CMakeDetermineVSServicePack" module now warns that it is
deprecated and should not longer be used. Use the
"CMAKE_<LANG>_COMPILER_VERSION" variable instead.
* The "FindITK" module has been removed altogether. It was a thin-
wrapper around "find_package(ITK … NO_MODULE)". This produces much
clearer error messages when ITK is not found.
* The "FindVTK" module has been removed altogether. It was a thin-
wrapper around "find_package(VTK … NO_MODULE)". This produces much
clearer error messages when VTK is not found.
The module also provided compatibility support for finding VTK 4.0.
This capability has been dropped.
Other Changes
=============
* The "cmake-gui(1)" learned to capture output from child processes
started by the "execute_process()" command and display it in the
output window.
* The "cmake-language(7)" internal implementation of generator
expression and list expansion parsers have been optimized and shows
non-trivial speedup on large projects.
* The Makefile generators learned to use response files with GNU
tools on Windows to pass library directories and names to the
linker.
* When generating linker command-lines, CMake now avoids repeating
items corresponding to SHARED library targets.
* Support for the Open Watcom compiler has been overhauled. The
"CMAKE_<LANG>_COMPILER_ID" is now "OpenWatcom", and the
"CMAKE_<LANG>_COMPILER_VERSION" now uses the Open Watcom external
version numbering. The external version numbers are lower than the
internal version number by 11.
* The "cmake-mode.el" major Emacs editing mode no longer treats "_"
as part of words, making it more consistent with other major modes.
——————————————————————-
Changes made since CMake 3.1.0-rc1:
Brad King (22):
FindCurses: Include CheckLibraryExists before using it (#15220)
Help: Clarify add_compile_options documentation (#15225)
Help: Reference add_compile_options from add_definitions (#15225)
KWSys: Fix configure_file call to use COPYONLY, not COPY_ONLY
Qt4: Fix configure_file call to use COPYONLY, not COPY_ONLY
FindIce: Drop use of :envvar: Sphinx markup
Help: Drop TOC from latex manuals
Help: Format add_library documented list of INTERFACE commands
Help: Fix example in cmake-packages to avoid long line
FindProtobuf: Cleanup reStructuredText documentation formatting
Modules: Wrap long lines in pre-formatted documentation blocks
Help: Tell latex to use a small font for cmake-language.7 productions
Utilities/Sphinx: Fix html_favicon configuration
Help: Update 3.1 release notes for dropping of FindITK and FindVTK
Help: Wrap long lines in pre-formatted documentation blocks
Help: Fix broken cross-references reported by 'nitpicky' option
Xcode: Fix compiler path detection for iOS tools on Xcode <= 5.0 (#15237)
ExternalProject: Restore logic to not download already-existing file
Help: Link to GNUInstallDirs from CMAKE_INSTALL_PREFIX (#15246)
Utilities/Sphinx: Add index entries for cross-references
Help: Add 3.1 release note Emacs mode update
CMake 3.1.0-rc2
Chuck Atkins (1):
Workaround for short jump tables on PA-RISC.
Clinton Stimpson (1):
genex: Preserve order while evaluating TARGET_OBJECTS
Daniele E. Domenichelli (1):
Fix link line order when shared libraries are de-duplicated
Iosif Neitzke (1):
Help: Fix configure_file call to use COPYONLY, not COPY_ONLY
J Decker (1):
Watcom: Drop symfile linker option
Nils Gladitz (1):
Documentation: Fix minor typo thecommand -> the command
Syohei YOSHIDA (1):
cmake-mode.el: syntax of '_' should be treated as symbol
Ådne Hovda (1):
KWSys SystemInformation: Check for _SC_AIX_REALMEM before using it