You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.7 KiB
41 lines
1.7 KiB
CMP0092
|
|
-------
|
|
|
|
.. versionadded:: 3.15
|
|
|
|
MSVC warning flags are not in :variable:`CMAKE_<LANG>_FLAGS` by default.
|
|
|
|
When using MSVC-like compilers in CMake 3.14 and below, warning flags
|
|
like ``/W3`` are added to :variable:`CMAKE_<LANG>_FLAGS` by default.
|
|
This is problematic for projects that want to choose a different warning
|
|
level programmatically. In particular, it requires string editing of the
|
|
:variable:`CMAKE_<LANG>_FLAGS` variables with knowledge of the
|
|
CMake builtin defaults so they can be replaced.
|
|
|
|
CMake 3.15 and above prefer to leave out warning flags from the value of
|
|
:variable:`CMAKE_<LANG>_FLAGS` by default.
|
|
|
|
This policy provides compatibility with projects that have not been updated
|
|
to expect the lack of warning flags. The policy setting takes effect as of
|
|
the first :command:`project` or :command:`enable_language` command that
|
|
initializes :variable:`CMAKE_<LANG>_FLAGS` for a given language ``<LANG>``.
|
|
|
|
.. note::
|
|
|
|
Once the policy has taken effect at the top of a project for a given
|
|
language, that choice must be used throughout the tree for that language.
|
|
In projects that have nested projects in subdirectories, be sure to
|
|
convert everything together.
|
|
|
|
The ``OLD`` behavior for this policy is to place MSVC warning flags in the
|
|
default :variable:`CMAKE_<LANG>_FLAGS` cache entries. The ``NEW`` behavior
|
|
for this policy is to *not* place MSVC warning flags in the default cache
|
|
entries.
|
|
|
|
This policy was introduced in CMake version 3.15. Use the
|
|
:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
|
|
Unlike many policies, CMake version |release| does *not* warn
|
|
when this policy is not set and simply uses ``OLD`` behavior.
|
|
|
|
.. include:: DEPRECATED.txt
|