Support was added in commit v3.1.0-rc1~475^2 (Features: Add support
for C++14 features., 2014-05-06), but the documentation for this
property was not amended.
AppleClang does not support the cxx_thread_local feature, even
though it is based on a Clang version which does support the
feature.
http://stackoverflow.com/a/23850891/2428389
A possible reason for that is that thread_local might be used as
a variable in existing Apple SDK headers.
Extend the WriteCompilerDetectionHeader module to generate a define
for that feature with portability fallbacks. For the avoidance of
making it easy to write code which looks correct but which has odd
runtime behavior, don't set the define symbol at all if no
equivalent keyword is known.
bb83cdaa Help: Add notes for topic 'AppleClang-5.1-features'
bd6b42c1 Features: Record for AppleClang 5.1
b341799e Tests: Fix RunCMake.CompileFeatures test NonValidTarget2 case
The change in commit v3.1.0-rc1~174^2 (Makefile: Handle '#' in
COMPILE_OPTIONS, 2014-08-12) was not compatible with code that
tries to workaround the original bug. Unfortunately there is no
good way to fix the bug in a compatible way. Add a release note
to call attention to the change.
On OS X, when CMAKE_USE_OPENSSL is OFF, use the OS implementation.
This will allow the OS-configured CA list to be trusted automatically.
This is supported on OS X 10.6 and above using AppleClang, Clang, and
GNU compilers.
Also add a 'CMAKE_ANDROID_API_MIN' variable to set the property
default. Teach the VS generator to write the MIN API value into
Nsight Tegra project files.
When install(EXPORT) is given an absolute destination we cannot compute
the install prefix relative to the installed export file location.
Previously we disallowed installation of targets in such exports with a
relative destination, but did not enforce this for target property
values besides the location of the main target file. This could lead to
broken installations when the EXPORT is installed to an absolute path
but usage requirements are specified relative to the install prefix.
Since an EXPORT installed to an absolute destination cannot be relocated
we can just hard-code the value of CMAKE_INSTALL_PREFIX as the base for
relative paths. This will allow absolute install(EXPORT) destinations
to work with relative destinations for targets and usage requirements.
Extend the ExportImport test with a case covering this behavior.
The use of FeatureSummary inside a find module is not a convention
yet used by upstream CMake modules. Drop the example from the
documentation about how to write find modules. If in the future
we add use of FeatureSummary to many of the upstream find modules
then this example can be restored as part of establishing the
convention.
The use of FeatureSummary inside a find module is not a convention
yet used by upstream CMake modules. Drop the example from the
documentation about how to write find modules. If in the future
we add use of FeatureSummary to many of the upstream find modules
then this example can be restored as part of establishing the
convention.
In commit v3.1.0-rc1~484^2 (Help: Format and revise file() command
documentation, 2014-05-23) the signature of file(GENERATE) was
accidentally simplified too much and dropped specification of the
required argument ordering. Restore the signature to make the order
clear.
If this option is enabled, the test step is created with the
EXCLUDE_FROM_MAIN option, and if TEST_BEFORE_INSTALL is enabled, the
install step does not depend on the test step.
This means that the test step is never executed, unless the test target
is explicitly created by calling ExternalProject_Add_StepTarget, or by
passing it with the STEP_TARGETS option, or with the EP_STEP_TARGETS
directory property.
An IMPORTED target in either type of package can equally depend on
an IMPORTED target in a Find module, which must be found as a
dependency, which is presumably the problem being implied. This is
not a distinction of creating an IMPORTED target in a Find module.
The FindXerces module was added in commit v3.1.0-rc1~155^2 (FindXerces:
New module to find Apache Xerces-C++, 2014-08-17). However, there are
two implementations of Xerces, one in C++:
http://xerces.apache.org/xerces-c/
and one in Java:
http://xerces.apache.org/xerces-j/
Rename FindXerces to FindXercesC to clarify that it is about the C++
implementation.
While at it, add the missing CMake 3.1 release note about this module.
Suggested-by: Erik Sjölund <erik.sjolund@gmail.com>
Copy CMAKE_EXE_LINKER_FLAGS into the test project generated by
try_compile, just like we already copy CMAKE_<LANG>_FLAGS.
Add CMake Policy CMP0056 to activate this behavior in a compatible way,
but do not warn by default when the policy is not set since it will
affect all try_compile calls.
Extend the RunCMake.try_compile test with a case covering this behavior
for each policy setting.
With PushScope and PopScope, keeping track of another bit of data for
each scope isn't easy. Instead, store it as another CMake variable so it
gets implicitly tracked along with everything else.
This works in a revert of commit
7d674b5f0b.
Provide options to fail without blocking or to block up to a timeout.
Provide options to specify the scope containing the lock so it can be
released automatically at the end of a function, file, or process.
Extend the RunCMake.file test with cases covering the file(LOCK) command
usage and error cases.
Add a VS_DEPLOYMENT_LOCATION source file property to specify where to
put files that are part of the package. For example:
set_property(SOURCE ${ASSET_FILES} PROPERTY VS_DEPLOYMENT_LOCATION "assets")
Without this, sources marked with VS_DEPLOYMENT_CONTENT cannot be
located properly.
Create properties VS_SHADER_ENTRYPOINT and VS_SHADER_MODEL. Without
these many .hlsl source files may not be possible to use. Extend the
VSWinStorePhone test project to cover them.
Revert the feature added by commit v3.1.0-rc1~420^2~2 (FindOpenGL:
Provide imported targets for GL and GLU, 2014-05-31). Unfortunately it
does not work on Windows because the full path to each library file is
not actually known. The IMPORTED_LOCATION of an imported target must be
a full path, but OPENGL_gl_LIBRARY is just 'opengl32' on Windows because
the actual library file is in some implicit link directory that we may
know know.
More infrastructure will be needed in CMake to allow a name-only
imported library. Until that exists, we will not be able to provide
imported targets in FindOpenGL.
In commit 079e8469ab (... OpenGL always needs X11 on Unix, 2002-09-05)
the FindOpenGL module was taught to search for X11 as a dependency of
the OpenGL library. This was done without a detailed explanation, and
the dependency should not be explicitly needed because OpenGL headers
should not expose applications to X11 APIs directly.
Unfortunately the only way to know if anything legitimately depends on
this behavior (perhaps in static library cases) is to simply remove it
and wait for issues to be reported. If so, then we can add some kind of
compatibility setting for this later. Add a release note to draw
attention to this change.
Reported-by: Dainius "GreatEmerald" Masiliūnas <pastas4@gmail.com>
Some applications only need the OpenSSL crypto library and want to avoid
linking against the SSL library. Set OPENSSL_CRYPTO_LIBRARY and
OPENSSL_SSL_LIBRARY in the code paths that do not need to find them
separately, and document them publicly. This allows applications to be
more specific when linking against OpenSSL.
8a75c7ef Help: Document the export limitation of INTERFACE_SOURCES.
e1348056 Export: Disallow export of targets with INTERFACE_SOURCES
bb5905bb cmTarget: Don't allow relative paths in INTERFACE_SOURCES
Since commit v3.1.0-rc1~479^2~1 (Add an "installed file" property
scope, 2014-05-15) the get_property and set_property commands
support an 'INSTALL' scope. Add documentation for this scope.
bb1111ea Help: Warn that paths should not be used in INTERFACE_ build properties.
96691d12 Help: Fix typo in genex in documentation.
f8f02451 Help: Use a property-specific command instead of the generic one.
8609a884 Help: Make remaining build property docs consistent.
bcface39 Help: Link to target_link_libraries from target properies.
e12926e7 Help: Format the LINK_INTERFACE_LIBRARIES target properies.
c8540e94 Help: Unify the help text of INTERFACE_ build properties.
Since commit v2.8.11~227^2~1 (Don't allow targets args in the new target
commands, 2013-01-29) the target_include_directories command does not
support target names on the right hand side, but that commit forgot to
remove it from the docs. It was never released with such support.
Update the command documentation now.
2d75d7e5 Help: Add notes for topic 'console-pool'
f42d86f0 Ninja: Implement USES_TERMINAL using the console pool if available
f281ae01 Ninja: Remove unused declaration
d5eae556 Ninja: factor out the test for console pool support
4d1fedf4 Give the interactive cache editor the USES_TERMINAL property
fe5d6e8c Add USES_TERMINAL option for custom commands
ad6ee426 Rename doing_verbatim to doing_nothing
A common idiom in CMake-based build systems is to have custom commands
that generate files not listed explicitly as outputs so that these
files do not have to be newer than the inputs. The file modification
times of such "byproducts" are updated only when their content changes.
Then other build rules can depend on the byproducts explicitly so that
their dependents rebuild when the content of the original byproducts
really does change.
This "undeclared byproduct" approach is necessary for Makefile, VS, and
Xcode build tools because if a byproduct were listed as an output of a
rule then the rule would always rerun when the input is newer than the
byproduct but the byproduct may never be updated.
Ninja solves this problem by offering a 'restat' feature to check
whether an output was really modified after running a rule and tracking
the fact that it is up to date separately from its timestamp. However,
Ninja also stats all dependencies up front and will only restat files
that are listed as outputs of rules with the 'restat' option enabled.
Therefore an undeclared byproduct that does not exist at the start of
the build will be considered missing and the build will fail even if
other dependencies would cause the byproduct to be available before its
dependents build.
CMake works around this limitation by adding 'phony' build rules for
custom command dependencies in the build tree that do not have any
explicit specification of what produces them. This is not optimal
because it prevents Ninja from reporting an error when an input to a
rule really is missing. A better approach is to allow projects to
explicitly specify the byproducts of their custom commands so that no
phony rules are needed for them. In order to work with the non-Ninja
generators, the byproducts must be known separately from the outputs.
Add a new "BYPRODUCTS" option to the add_custom_command and
add_custom_target commands to specify byproducts explicitly. Teach the
Ninja generator to specify byproducts as outputs of the custom commands.
In the case of POST_BUILD, PRE_LINK, and PRE_BUILD events on targets
that link, the byproducts must be specified as outputs of the link rule
that runs the commands. Activate 'restat' for such rules so that Ninja
knows it needs to check the byproducts, but not for link rules that have
no byproducts.
Now that we know the year component of this VS version we
can add it to the generator name. For convenience, map
the name without the year to the name with the year.
Teach the add_custom_command and add_custom_target commands a new
USES_TERMINAL option. Use it to tell the generator to give the command
direct access to the terminal if possible.
Format the reStructuredText markup manually. Organize the command
options into a definition list. Use inline markup to cross-reference
related documents.
string SUBSTRING command now ignores length if it points
past end of string and uses end of string instead.
String SUBSTRING tests now cover more corner cases.
3c497f11 Help: Add notes for topic 'ExternalProject_UPDATE_DISCONNECTED'
aba5cec6 ExternalProject: Add unit tests for UPDATE_DISCONNECTED
3f606fa7 ExternalProject: Add UPDATE_DISCONNECTED option
c0b749cf ExternalProject: Always add a command to a step
Add support for Sun/Uniforum/GNU gettext libintl. This belongs in CMake
rather than upstream because:
* There are multiple upstreams (Sun, GNU).
* It may or may not be in the glibc C library depending
upon the platform and build options used.
Although we already have a FindGettext module, that is for the tools.
This module is for the library, and is independent because it's
perfectly OK to use libintl without the gettext tools (and vice versa),
and they might not all be found. Add cross references between the two
modules in notes to make the relationship clearer.
The changes made by commit v3.1.0-rc1~46^2~1 (FindITK: Drop this ancient
compatibility module, 2014-10-02) and commit v3.1.0-rc1~46^2 (FindVTK:
Drop this ancient compatibility module, 2014-10-02) need to come with
release notes explaining that the modules were dropped. Also remove a
release not related to an update made to FindVTK that was never
released.
1531df2b configure_file: Warn about unknown arguments
4abbb140 Qt4: Fix configure_file call to use COPYONLY, not COPY_ONLY
bd7ba8e2 KWSys: Fix configure_file call to use COPYONLY, not COPY_ONLY
e9282782 Help: Fix configure_file call to use COPYONLY, not COPY_ONLY
When we explain in add_definitions documentation that it is intended
only for preprocessor definitions, link to add_compile_options for
adding other flags. Also explicitly mention that the order of
add_definitions calls with respect to target creation does not matter.
This differs from the behavior now explicitly stated in the
documentation of add_compile_options.
Explain that it affects only targets added after the call. Fix the link
to the COMPILE_OPTIONS directory propert documentation. Update the
latter to explain that it is used to initialize the corresponding target
property when a target is created.
80b19a71 Help/manual: Avoid long lines in code blocks
4fdacedc Help: Clarify formatting of CPACK_WIX_ACL documentation
35ca4863 Help: Wrap long ctest_submit signature line
58b2d760 Modules: Format documentation to avoid over-long preformatted lines
Update the wording of some examples to avoid long lines in code blocks.
Otherwise the formatted documentation can exceed certain column width
limitations.
Add section headers similar to the 3.0 release notes and move each
individual bullet into an appropriate section. Highlight the new VS
generator capabilities for Windows Phone, Windows Store, and NVIDIA
Nsight Tegra with dedicated subsections.
Move all development release notes into a new version-specific document:
tail -q -n +3 Help/release/dev/* > Help/release/3.1.0.rst
git rm -- Help/release/dev/*
except the sample topic:
git checkout HEAD -- Help/release/dev/0-sample-topic.rst
Reference the new document from the release notes index document.
Add a title and intro sentence to the new document by hand.
631fadea Help: Add notes for topic 'fix-OSX-bundle-rpaths-and-Qt5'
50e261dd OSX: Warn when attempting to change runtime paths on OS X 10.5
9b98fd52 cmake-gui: Make sure we bundle Qt5 Cocoa platform plugin
83a06bb4 BundleUtilities: Framework codesign Resources/Info.plist & Current
f7df82ac BundleUtilities: Resolve & replace @rpath placeholders
14bc686f GetPrerequisites: Make sure dyld placeholders are prefixes
6c313797 BundleUtilities: Use find on UNIX for fast executable lookup
e0e75a72 Help: Add notes for topic 'ctest-memcheck-sanitizers'
7345a1f7 tests: Add a test for ctest_memcheck MemorySanitizer
0c6330da ctest_memcheck: Add support for MemorySanitizer msan
9ba8bf12 tests: add a test for ctest_memcheck UndefinedBehaviorSanitizer
816c100a ctest_memcheck: Add support for UndefinedBehaviorSanitizer ubsan
b67ef537 ctest_memcheck: Order sanitizer type code consistently
f48a2968 Tests: Organize CTestTestMemcheck inner test code
The modern dashboard server is CDash, not Dart, so update the manual
to talk about CTest as a CDash client. Also drop documentation for
a Dart2-specific option.
f25e431d tests: set sanitizer options properly
f0661bf3 tests: fix copy/paste from tsan -> asan comments
ca9cc25c ctest: add support for additional sanitizer options
0b9ffffc ctest: update documentation for CTEST_MEMORYCHECK_TYPE
The FindVTK module only existed to help find_package(VTK) calls work in
old projects written to use "USE_VTK_FILE" instead of "VTK_USE_FILE".
Drop it to allow find_package(VTK) calls to search for VTKConfig.cmake
directly.
The FindITK module only existed to help find_package(ITK) calls work in
old projects written to use "USE_ITK_FILE" instead of "ITK_USE_FILE".
Drop it to allow find_package(ITK) calls to search for ITKConfig.cmake
directly.
df84281d Help: Add notes for topic 'vs-nsight-tegra-generator'
69e198dc VS: Generate Nsight Tegra project revision number
5365c9ac VS: Map Nsight Tegra file types in .vcxproj files
178f56a5 VS: Fix Tegra-Android platform linking of libraries by name
7115702f Tests: Add test for VS Nsight Tegra generator support
a6289499 VS: Generate ANDROID_GUI executables as app packages
c12e4699 Add 'ANDROID_API' target property to set Android Target API
9a4df52a Add 'ANDROID_GUI' target property to mark Android applications
16569abf cmTarget: Track internally whether platform is Android
ef0fd4f0 VS: Teach vcxproj generation about the Tegra-Android platform
d09b60f5 VS: Detect compiler id of Nsight Tegra-Android toolchains
2f071466 VS: Teach VS >= 10 to recognize CMAKE_SYSTEM_NAME 'Android'
Also add a 'CMAKE_ANDROID_GUI' variable to set the property default
so a project can easily make all executables Android applications.
An Android application executable file has the same extension as a
shared library (.so).
When CMAKE_SYSTEM_NAME is 'Android', check for an installation of
'NVIDIA Nsight Tegra Visual Studio Edition' and generate .vcxproj
files for the "Tegra-Android" platform. Also make the installed
version available in a CMAKE_VS_NsightTegra_VERSION variable.
be6a555d Tests: Test setting a generator platform in a toolchain file
d506fee8 Tests: Use -A option to pass generator platform selection
11c9ddd6 ExternalProject: Use -A option to pass generator platform
29bd843e CTest: Use -A option to pass generator platform selection
eb7d8156 cmake: Add -A option to specify a generator platform
858d5a0b Fix if() checks of CMAKE_SYSTEM_NAME on Cygwin
e177e7af FPHSA: Avoid if() dereferencing of quoted variable
425acc52 cmcurl: Use if(DEFINED) to simplify conditions
cede5cbd libarchive: Avoid depending on if() to dereference a quoted variable
2d97178b FindGTK2: Avoid depending on if() to dereference a quoted variable
0b12815d Modules/Test*.cmake: Use if(DEFINED) to simplify conditions
188a1f23 If: Introduce policy CMP0054 - don't dereference quoted variables in if()
b900c1cc If: Extract cmConditionEvaluator from if() implementation
Define the 'cmake -A' option to set CMAKE_GENERATOR_PLATFORM
without having to spell out the whole variable name. We choose
the name '-A' for "platform" because '-P' is already taken, and
in the common use case the "platform" is actually an architecture
(e.g. x64).
Teach the RunCMake test infrastructure to use -A to pass the generator
platform. Extend the RunCMake.GeneratorPlatform test with a case to
verify that the -A option cannot be repeated.
The ctest_configure command already reads the CTEST_CMAKE_GENERATOR
variable to get the value for the cmake -G option. Read new variable
CTEST_CMAKE_GENERATOR_PLATFORM to pass on as CMAKE_GENERATOR_PLATFORM.
The "ctest --build-and-test" mode already has "--build-generator" to
specify the -G option to CMake. Add a "--build-generator-platform" option
to specify a value to pass on as CMAKE_GENERATOR_PLATFORM.
For VS generator names that do not specify the platform name, read
CMAKE_GENERATOR_PLATFORM to get it.
Extend the RunCMake.GeneratorPlatform test with a case covering
use of the x64 platform when the test generator is a Visual Studio
generator whose name does not specify a platform.
Reject the option by default. It will be implemented on a per-generator
basis. Pass the setting into try_compile project generation. Add cache
entry CMAKE_GENERATOR_PLATFORM and associated variable documentation to
hold the value persistently.
Add a RunCMake.GeneratorPlatform test to cover basic use cases for the
option. Verify that CMAKE_GENERATOR_PLATFORM is empty by default, and
that it is rejected when the generator does not support a user setting.
Explain that try_compile calls need to be protected with conditions to
avoid running more than once so that it is easy to isolate a single
try_compile to perform with --debug-trycompile.
39fefde2 VS: Add test case for Windows Phone and Windows Store
89da8465 MSVC: Define 'WIN32' for Windows Store and Windows Phone
ed7f085f Help: Add notes for topic 'vs-windows-apps'
dd11ae8f VS: Do not compile C sources as WinRT (#15100)
b8e40538 VS: Mark Windows Phone and Store targets as App Containers
0432f062 VS: Always ignore ole32 on Windows Phone 8.0
e6ff2f8b VS: Generate Windows Metadata for WinRT components
ee48f4c7 VS: Generate Windows Phone and Windows Store projects as Unicode
cb1aceed VS: Add VS_WINRT_COMPONENT property to enable CompileAsWinRT
401269e4 VS: Handle .pfx files explicitly in generator
23782171 VS: Handle AppxManifest sources explicitly in generator
bc373c6d VS: Set Window Phone/Store app type in CMake-generated targets
d89b2889 VS: Mark CMake-generated targets as Utility in .vcxproj files
03ad8f28 CMakeDetermineCompilerABI: Link with standard libraries on MSVC
The MSVC /ZW flag is valid only for C++ sources. Whenever we enable
CompileAsWinRT for the whole target, disable it for all C sources.
Update the documentation of VS_WINRT_COMPONENT to drop the statement
about undefined behavior for non-C++ sources, because it is now
defined as expected.
cbd1d42b Help: Add notes for topic 'vs-masm'
0f8522a6 VS: Add MASM support to VS 8 and 9 (#8170, #14984)
a43f4400 VS: Move internal MasmEnabled member up to VS 7 generator
df3b007d VS: Add test for MASM support
e8727449 VS: Populate MASM tool build settings in .vcxproj files
0271a5f9 VS: Manually fix MASM flag table entries
1d662e48 VS: Generate MASM flag tables from MSBuild tool files
4f6940df VS: Fix ASM_MASM support in VS >= 10
d7866c52 ASM_MASM: Fix selection of ml64
0374abdb ASM_MASM: Add preprocessor definitions to compile lines
5b0a46e1 ASM_MASM: Do not require compiler to be a full path
802dbe52 cmLocalVisualStudio7Generator: Rename local 'lang' var
Deprecate VS_WINRT_EXTENSIONS and document VS_WINRT_COMPONENT as for VS
generators only. Also define _WINRT_DLL in SHARED libraries in order to
get a .lib produced.
Inspired-by: Paul Annetts <paul@lightunobscured.com>
- autodetects Ice on all major platforms
- allows building with all supported Visual Studio versions on Windows
- autodetects the slice path on most platforms
- separately detects the Ice programs, headers, slice files and
libraries so that any Ice configuration or installation errors can
be accurately reported, making diagnosis of Ice problems simpler
aa21001b Help: Add notes for topic 'vs-special-source-file-properties'
6fe770e1 VS: Add a source file property to set the hlsl shader type
9b4dc2ad VS: Add a source file property to mark content for Windows App deployment
f063a914 VS: Re-arrange WriteExtraSource to support tool configuration
653529ce CTest: Allow / to be in the build name, and be consistent with the build name
39b5df2f ctest_update: Add CTEST_UPDATE_VERSION_ONLY option to only note the version
This allows ctest_update to get the current version without actually
changing the repository. This is useful when using Jenkins or an
external project to update the source to a specific version, but you
still want the current version to show up in CDash.
Copy the CheckCSourceCompiles module and port it to Fortran.
Extend the FortranOnly test to try using the new module.
Suggested-by: Nicolas Bock <nicolasbock@gmail.com>
Create a VS_DEPLOYMENT_CONTENT source file property, supporting
generator expressions, to compute whether a source file should be marked
as DeploymentContent or ExcludedFromBuild in Windows Phone and Windows
Store projects.
Inspired-by: Minmin Gong <minmin.gong@gmail.com>
5d3d9a22 Help: Add notes for topic 'vs-windows-phone-and-store'
401a00d9 VS: Set WindowsPhone and WindowsStore min VS version required
709cebde VS: Generate WindowsPhone and WindowsStore application types
72395ab2 VS: Add .sln "Deploy" mark for WindowsPhone and WindowsStore binaries
2074f581 MSVC: Add system libs for WindowsPhone and WindowsStore
c72f0887 MSVC: Add default WindowsPhone and WindowsStore compile flags
1c94558a MSVC: Disable incremental linking for WindowsPhone and WindowsStore
592098e2 Define 'WINDOWS_PHONE' and 'WINDOWS_STORE' variables
aa42a78f Add WindowsPhone and WindowsStore platform information modules
b94ddf6c CMakeDetermineCompilerId: Recognize WindowsPhone and WindowsStore
d7938bff VS: Select WindowsPhone and WindowsStore default toolsets
3abd150c VS: Save WindowsPhone and WindowsStore system internally
5bf1c5cc Help: Document add_custom_command PRE_BUILD/PRE_LINK for exe/lib only (#15059)
2a58c872 Help: Revise and format 'add_custom_command' docs
cb88742d Help: Remove stray content from 'add_custom_command' docs
State explicitly that the PRE_LINK mode is not for targets created by
the add_custom_target command. The existing wording for PRE_BUILD being
treated as PRE_LINK by non-VS generators will now imply this restriction
for PRE_BUILD too.
Format the reStructuredText markup manually. Organize the command
options into a definition list. Use inline markup to cross-reference
related documents.
Document the COMPILE_DEFINITIONS_<Config> properties as deprecated.
Add new sections for deprecated properties and move POST_INSTALL_SCRIPT
and PRE_INSTALL_SCRIPT there as well.
Previously this generator expression was used internally by the
target_link_libraries command to honor private linking requirements of
static libraries in their INTERFACE_LINK_LIBRARIES. Remove the check
that limits $<LINK_ONLY> to this use case to make it available for
project code to use too.
This reverts commit cfab942e5f.
Since commit v2.8.11~362^2 (Generate an early-return guard in target
Export files, 2012-11-30) an external include guard is not needed.