This allows for a more graceful transition for projects using C++20
without scanner support (e.g., Clang 15 or GCC 13). While newer
compilers will (needlessly) scan, it allows C++20-using projects to use
older compilers without having to set `CMAKE_CXX_SCAN_FOR_MODULES` to
support newer CMake minimum versions.
Fixes: #25357
Extract the effective linker during the computation of implicit artifacts
delivered by the compiler to the linker.
Define various variables describing the linker:
* CMAKE_<LANG>_COMPILER_LINKER
* CMAKE_<LANG>_COMPILER_LINKER_VERSION
* CMAKE_<LANG>_COMPILER_LINKER_ID
* CMAKE_<LANG>_COMPILER_LINKER_FRONTEND_VARIANT
This is complementary to feature introduced by commit 96a953b1ed
(Add options to specify linker tool, 2023-09-27).
Fixes: #17596, #18209, #25344
ed45432571 cmNinjaTargetGenerator: do not order-depend on C++ module sources
0973cd6702 cmNinjaTargetGenerator: use the file set visibility API
4625170925 cmFileSet: add a query for includeable file set types
51f9d9f0a2 cmNinjaTargetGenerator: avoid traversing old outputs repeatedly
Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !8902
ed45432571 cmNinjaTargetGenerator: do not order-depend on C++ module sources
0973cd6702 cmNinjaTargetGenerator: use the file set visibility API
4625170925 cmFileSet: add a query for includeable file set types
51f9d9f0a2 cmNinjaTargetGenerator: avoid traversing old outputs repeatedly
Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !8902
C++ module sources should not be included by any other TUs, so their
presence cannot matter for order-only dependencies of the entire target.
Exclude them.
Update CMP0154 to take this into consideration and add tests to the
`CXXModules` suite (which already deals with module support detection).
Offer the capability, through variable `CMAKE_LINKER_TYPE`, as well as
the target property `LINKER_TYPE` to specify which linker must be used.
The implementation of this capability is specified by variables specific
to the language and linker type: `CMAKE_<LANG>_USING_LINKER_<TYPE>`.
Some definitions are provided as part of `CMake`.
For example, to select the `LLVM` linker rather than the standard one,
the type `LLD` should be specified through the variable `CMAKE_LINKER_TYPE`.
And, on `Apple`, `Linux` and some environments on `Windows`, the variable
`CMAKE_<LANG>_USING_LINKER_LLD` has value `-fuse-ld=lld`. And for `Windows`
environments based on `MSVC`, where the linker is used directly, the tool
`lld-link.exe` will be used rather than `link.exe`.
Fixes: #19174, #24254, #24990
Run the script:
Utilities/Sphinx/update_versions.py --since v3.27.0 --overwrite
Manually remove directives added to new documentation of existing
environment variables.
Fix indentation of the `versionadded` markup added by commit 634079b86d
(cmGeneratorExpressionEvaluator: Short-circuit boolean operators,
2023-09-11) to render the note in the appropriate scope.
437280b127 cxxmodules: scan C++ sources for imports by default
3cddd11649 Ninja: message about not compiled sources explicitly
068fde1c34 cmGeneratorTarget: use `this->` for method calls
197a6bf171 cxxmodules: rework control logic for scanning regular C++ sources
5eb7bd641a Tests/RunCMake/CXXModules: remove rules file requirement
ff18acc301 CXXModules: remove `EXPERIMENTAL` from C++ module variable names
0c07f39006 cmExperimental: remove the flag for C++ modules
68caec9137 Help: add a manpage for cxxmodule support
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Pavel Solodovnikov <hellyeahdominate@gmail.com>
Merge-request: !8828
Now that scanning support is no longer experimental, the logic for
whether or not to scan C++ 20 sources is now important because all
projects are now exposted to the logic. Make the scanning rules explicit
in the documentation and rework the queries to localize all of the
associated logic.
A policy to handle the ultimate fallback logic will be implemented in a
following commit.
Improve the documentation from commit 46896d98bb (foreach(): loop
variables are only available in the loop scope, 2021-04-25,
v3.21.0-rc1~245^2) to follow policy documentation convention.
Fixes: #25224
Inspired-by: Marius Messerschmidt <marius.messerschmidt@googlemail.com>
Since refactoring in commit 0a5aeaf302 (cmCTestRunTest: Consolidate test
timeout selection logic, 2023-05-04, v3.27.0-rc1~120^2) we accidentally
truncate `--timeout` values to ctest's default `TimeOut`. Fix the
logic to prefer the flag whenever the `TIMEOUT` property is not set.
In combination with the prior refactoring, this also fixes a bug that
caused `--timeout` values of 10000000 seconds or more to be ignored.
Fixes: #23979
