Add a `CMAKE_Swift_COMPILATION_MODE` variable and corresponding
`Swift_COMPILATION_MODE` target property to control the compilation
mode. Select among `wholemodule`, `singlefile`, and `incremental`.
Add policy CMP0157 to remove the default `-wmo` flags in favor of the
abstract setting.
Issue: #25366
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
6546aa2a2a ci: Add HIP job using CUDA on NVIDIA GPUs
18158bf81c HIP: Add support for NVIDIA GPUs
127b6fa06b HIP: Add CMAKE_HIP_PLATFORM variable to specify GPU platform
90e23f40ee Tests/HIP/WithDefs: Clean up test case
9ebdf3281f Tests/HIP/ArchitectureOff: Cover HIP_ARCHITECTURES initialization
cfec29196e ci: Add CUDA 11.8 to HIP 5.5 image
26470eb987 ci: Put HIP GPU platform in CMake_TEST_HIP
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !8817
Update the comment added by commit 485256f2d0 (Unity: Suppress
clang-tidy 'bugprone-suspicious-include' warning, 2023-04-27,
v3.27.0-rc1~149^2) to work for C.
Fixes: #25184
The latter call is no longer post-bootstrap only since 596439b1bb
(cmCustomCommandGenerator: Add option to transform depfile, 2020-10-05)
via !5325. Convert callers to just use `cmCryptoHash` directly and
remove the bootstrap guard.
`include-what-you-use` diagnostics, in practice, are specific to
the environment's compiler and standard library. Update includes
to satisfy IWYU for our CI job under Debian 12.
The `CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES` are computed using
`try_compile` in `CMAKE_DETERMINE_COMPILER_ABI`, but the implicit
include directories are not known during that `try_compile`. This can
be a problem when the HIP runtime include path is `/usr/include`,
because the runtime include path is always added to the userDirs and the
compiler automatically includes standard library headers via
`__clang_hip_runtime_wrapper.h`.
Issue: #24562
Many custom commands are created by CMake itself rather than by
the user. These custom commands should always have their policies
set to NEW, and user-created custom commands should have their
policy values set only from the state snapshot. In addition, we
want to genericize the mechanism of recording a policy at the time
of custom command creation.
Add a CM_FOR_EACH_CUSTOM_COMMAND_POLICY macro to genericize
custom command policies. Use this to define all custom command
policies. Make all such policies NEW instead of WARN by default.
Remove individual policy modifier methods and add a single method
that records relevant values from a cmStateSnapshot. Remove the
no longer needed explicit policy settings from synthesized custom
commands.
The call site in `AddLanguageFlags` is now the "one true place" for
adding language standard flags. Inline the helper to reduce risk of
adding other call sites later.
Previously we added the language standard flag near the end of all
options, even after those added by `add_compile_options` and friends.
However, on some compilers such as MSVC, the `-std` flag may reset
defaults for flags that precede it on the command line. Move the
language standard flag to before all other flags that CMake adds for
other abstractions, and before those added by `add_compile_options`.
`CMAKE_<LANG>_FLAGS` should still precede the language flags though,
because they are meant to be treated as language-wide modifications to
the compiler defaults, similar to `$CC $CFLAGS`.
Fixes: #23860Fixes: #24170
Under the policy's NEW behavior, `[CMAKE_]MSVC_DEBUG_INFORMATION_FORMAT`
may be explicitly set to an empty string to tell CMake not to add any
flags for this abstraction. In this case, fall back to checking the
language-wide flags as we do in the OLD behavior.
This revises commit 183b9a9eca (CMP0141: Fix PCH REUSE_FROM under policy
NEW behavior, 2022-10-31, v3.25.0-rc3~4^2).
Issue: #24106
Under the CMP0141 NEW behavior added by commit 0e96a20478 (MSVC: Add
abstraction for debug information format, 2022-08-25, v3.25.0-rc1~142^2~1),
the `-Zi` and `-ZI` flags do not appear in `CMAKE_<LANG>_FLAGS_<CONFIG>`
anymore. Teach the PCH REUSE_FROM implementation to recognize the
`EditAndContinue` and `ProgramDatabase` debug information formats
through the policy's new abstraction.
Fixes: #24106
In commit 76a08cd253 (COMPILE_WARNING_AS_ERROR: Add options to treat
warnings as errors, 2022-04-21, v3.24.0-rc1~173^2) we formatted the
options table entries as command-line string fragments. Since they are
part of the `CMAKE_${lang}_COMPILE_OPTIONS_*` tables, they should be
formatted as `;`-separated lists of compiler options.
Replace our hard-coded default for `/Zi` with a first-class abstraction
to select the debug information format an enumeration of logical
names. We've long hesitated to do this because the idea of "debug
information format" touches on related concepts on several platforms.
Avoid that scope creep by simply defining an abstraction that applies
only when targeting the MSVC ABI on Windows.
Removing the old default flag requires a policy because existing
projects may rely on string processing to edit them and choose a
runtime library under the old behavior. Add policy CMP0141 to
provide compatibility.
Fixes: #10189
