mirror of
https://github.com/Detanup01/gbe_fork.git
synced 2024-11-28 13:44:02 +08:00
72 lines
2.3 KiB
ReStructuredText
72 lines
2.3 KiB
ReStructuredText
CMP0083
|
|
-------
|
|
|
|
.. versionadded:: 3.14
|
|
|
|
To control generation of Position Independent Executable (``PIE``) or not, some
|
|
flags are required at link time.
|
|
|
|
CMake 3.13 and lower did not add these link flags when
|
|
:prop_tgt:`POSITION_INDEPENDENT_CODE` is set.
|
|
|
|
The ``OLD`` behavior for this policy is to not manage ``PIE`` link flags. The
|
|
``NEW`` behavior is to add link flags if :prop_tgt:`POSITION_INDEPENDENT_CODE`
|
|
is set:
|
|
|
|
* Set to ``TRUE``: flags to produce a position independent executable are
|
|
passed to the linker step. For example ``-pie`` for ``GCC``.
|
|
* Set to ``FALSE``: flags not to produce a position independent executable are
|
|
passed to the linker step. For example ``-no-pie`` for ``GCC``.
|
|
* Not set: no flags are passed to the linker step.
|
|
|
|
Since a given linker may not support ``PIE`` flags in all environments in
|
|
which it is used, it is the project's responsibility to use the
|
|
:module:`CheckPIESupported` module to check for support to ensure that the
|
|
:prop_tgt:`POSITION_INDEPENDENT_CODE` target property for executables will be
|
|
honored at link time.
|
|
|
|
This policy was introduced in CMake version 3.14. Use the
|
|
:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
|
|
Unlike most policies, CMake version |release| does not warn when this policy is
|
|
not set and simply uses ``OLD`` behavior.
|
|
|
|
.. Note::
|
|
|
|
Android platform has a special handling of ``PIE`` so it is not required
|
|
to use the :module:`CheckPIESupported` module to ensure flags are passed to
|
|
the linker.
|
|
|
|
.. include:: DEPRECATED.txt
|
|
|
|
Examples
|
|
^^^^^^^^
|
|
|
|
Behave like CMake 3.13 and do not apply any ``PIE`` flags at link stage.
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_minimum_required(VERSION 3.13)
|
|
project(foo)
|
|
|
|
# ...
|
|
|
|
add_executable(foo ...)
|
|
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)
|
|
|
|
Use the :module:`CheckPIESupported` module to detect whether ``PIE`` is
|
|
supported by the current linker and environment. Apply ``PIE`` flags only
|
|
if the linker supports them.
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_minimum_required(VERSION 3.14) # CMP0083 NEW
|
|
project(foo)
|
|
|
|
include(CheckPIESupported)
|
|
check_pie_supported()
|
|
|
|
# ...
|
|
|
|
add_executable(foo ...)
|
|
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)
|