Teach `ExternalProject_Add` and `FetchContent_Declare` to resolve
relative remote URLs provided via `GIT_REPOSITORY`. Add policy
CMP0150 to maintain compatibility.
Fixes: #24211
Co-Authored-By: Craig Scott <craig.scott@crascit.com>
The `FindPythonInterp` and `FindPythonLibs` modules have been deprecated
since CMake 3.12. Add a policy to pretend they do not exist in order to
encourage projects to port to `FindPython` or `FindPython{2,3}`.
In commit 33c15ae2b9 (VS: Build custom commands concurrently when
possible, 2023-01-19, v3.26.0-rc1~56^2) we added `BuildInParallel` to
custom commands in `.vcxproj` files, but that had to be reverted by
commit abb1c12162 (VS: Revert "Build custom commands concurrently when
possible", 2023-03-07, v3.26.0-rc6~3^2) because some projects may have
custom commands that accidentally rely on serial execution in MSBuild.
Add a policy to use `BuildInParallel` for custom commands in projects
that have been updated to set the policy to `NEW`.
Fixes: #18405
The `FindCUDA` module has been deprecated since CMake 3.10.
Add a policy to pretend it doesn't exist in order to encourage
projects to port away from it.
Extend commit eb35d8884b (find_package: Use PackageName_ROOT variables
as search prefixes, 2018-03-15, v3.12.0-rc1~349^2) to also check
upper-case `<PACKAGENAME>_ROOT` variables. Add policy `CMP0144` to
enable the behavior in a compatible way.
Fixes: #24403
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
Forward `CMAKE_<LANG>_FLAGS` and `CMAKE_<LANG>_FLAGS_DEBUG` from the
calling project into the test project. The set of flags may affect the
availability of IPO support. Since this may change the result of the
check for existing projects, add a policy for compatibility.
This was discovered after commit 5fcadc481e (MSVC: Default to -ZI
instead of /Zi for x86 and x64, 2022-05-24) introduced policy CMP0138 to
switch our default for MSVC's debug info flag. The `-ZI` flag is
incompatible with the `-GL` flag used for IPO, so CMP0138 was reverted
pending future work on an alternative solution. Re-use the CMP0138
policy number for this change to CheckIPOSupported instead.
Fixes: #23607
Revert commit 5fcadc481e (MSVC: Default to -ZI instead of /Zi for x86
and x64, 2022-05-24). The `-ZI` flag is incompatible with the `-GL`
flag used for IPO, and so is not an unconditionally better default.
Revert the change pending future design of a first-class setting for
MSVC debug info format that can be automatically reconciled with IPO
settings.
That commit introduced policy CMP0138, but we already have later policy
numbers used too. Leave placeholder text to avoid policy renumbering.
Issue: #23607, #10189
Add policy CMP0137 to propagate both our builtin variables and those
listed by `CMAKE_TRY_COMPILE_PLATFORM_VARIABLES` to `try_compile`
whole-project builds.
Inspired-by: Alexander Neumann <Alexander.Neumann@hamburg.de>
Fixes: #23219
Add a `CMAKE_WATCOM_RUNTIME_LIBRARY` variable to control the
runtime library selection. Add policy CMP0136 to switch to
in place of the old hard-coded default flags.
Fixes: #23178
Add the option to keep the current filestamps when extracting an
archive in ExternalProject_Add.
Enabling this option makes the behavior consistent with how
ExternalProject_Add is used when checking out code from revision
control instead of an archive.
Fixes: #22746
Since macOS 12.0 deprecated the tools needed to attach a SLA to a
`.dmg`, we should no longer do this by default. Add a policy to
change the default to off.
Fixes: #22978
When running CMake for the first time in a build tree, for some
generators CMake would set compiler environment variables
like CC, CXX, etc. when the corresponding language is enabled.
That behavior was never documented and can result in different
behavior between the first and subsequent runs. Add a policy
to no longer set those environment variables.
Fixes: #21378
Previously we always used content guarded by `$<LINK_ONLY:...>`
in `LINK_LIBRARIES`, even when evaluating for non-linking usage
requirements. Add a policy to honor `LINK_ONLY` in `LINK_LIBRARIES`
the same way we already do in `INTERFACE_LINK_LIBRARIES`.
Optionally verify that items in `LINK_LIBRARIES` and
`INTERFACE_LINK_LIBRARIES` that can be target names are actually target
names. Add a `LINK_LIBRARIES_ONLY_TARGETS` target property and
corresponding `CMAKE_LINK_LIBRARIES_ONLY_TARGETS` variable to enable
this new check.
Fixes: #22858
