Document and add explicit tests for empty string input:
`if(EXISTS "")` and `if(IS_DIRECTORY "")` are always false.
This avoids need for users to do extra checks due to
CMake non-short-circuit logic as below:
if("${p}")
if(EXISTS "${p}")
The "In makefile terms" explanation is left from very early days of
CMake to help developers migrating from hand-written makefiles.
These days it is often misinterpreted, particularly in the context
of multiple `add_custom_command` calls, to mean that we generate a
single Makefile containing rules for all custom commands. This
leads to an incorrect mental model of the expressed build system.
The actual generated build system may spread the rules across multiple
targets that do not see the each other's file-level rules, which makes
target-level dependencies important too.
Avoid hard-coding a warning-as-error flag now that CMake offers a
first class abstraction for that.
Also mention some relevant generator expressions which can be used
to provide even more specific targeting with language-specific flags.
Fixes: #24200
Evaluate and expand generator expressions in the `COMMENT` argument of
the `add_custom_command()` and `add_custom_target()` commands.
This allows to include generator expressions, e.g. a targets location
$<TARGET_...> or the current configuration $<CONFIG>, in the build-time
messages.
Fixes#22507
On Windows, a file may be inaccessible for a short time after it is
created. This occurs for various reasons, including indexing, antivirus
tools, and NTFS's asynchronous semantics. Add an `INPUT_MAY_BE_RECENT`
option to tell CMake that the input file may have been recently created
so that we can retry a few times to read it.
This allows the Zstd compression-level to be set between 0-19. I've
adjusted some of the tests, and error messages to indicates the selected
algorithm, and min/max of its compression-level.
Fixes: #24160
d4d1f85297 Help: Move a note about arguments and genexes into include file
968224484f Help: Drop unused `PROPERTY_GENEX` replace from `prop_tgt/INTERFACE_*` files
65457e4fae Help: Add _See Also_ sections to related CMake commands
c86ec79d07 Help: Use direct refs to genexes instead of ``$<GENEX-NAME>``
8c6274326d Help: Use CMake highlighting for command synopsis
c356a94512 Help: Use monospaced font for a genex name in a section title
f98c8707f4 Help: Use `code-block:: cmake` instead of `::` for sub-commands descriptions
2ba351ca4f Help: ``CMake`` → CMake
...
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !7873
Add a `versionadded` mark for the search path added by commit e55c154c5b
(cmFindPackageCommand: Add one more search path, 2022-06-27,
v3.25.0-rc1~339^2~1).
Fixes: #24067
