mirror of
https://github.com/ZDoom/zdoom-macos-deps.git
synced 2024-11-22 20:11:51 +00:00
45 lines
1.7 KiB
CMake
45 lines
1.7 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CheckLinkerFlag
|
|
---------------
|
|
|
|
.. versionadded:: 3.18
|
|
|
|
Check whether the compiler supports a given link flag.
|
|
|
|
.. command:: check_linker_flag
|
|
|
|
.. code-block:: cmake
|
|
|
|
check_linker_flag(<lang> <flag> <var>)
|
|
|
|
Check that the link ``<flag>`` is accepted by the ``<lang>`` compiler without
|
|
a diagnostic. Stores the result in an internal cache entry named ``<var>``.
|
|
|
|
This command temporarily sets the ``CMAKE_REQUIRED_LINK_OPTIONS`` variable
|
|
and calls the :command:`check_source_compiles` command from the
|
|
:module:`CheckSourceCompiles` module. See that module's documentation
|
|
for a listing of variables that can otherwise modify the build.
|
|
|
|
The underlying implementation relies on the :prop_tgt:`LINK_OPTIONS` property
|
|
to check the specified flag. The ``LINKER:`` prefix, as described in the
|
|
:command:`target_link_options` command, can be used as well.
|
|
|
|
A positive result from this check indicates only that the compiler did not
|
|
issue a diagnostic message when given the link flag. Whether the flag has any
|
|
effect or even a specific one is beyond the scope of this module.
|
|
|
|
.. note::
|
|
Since the :command:`try_compile` command forwards flags from variables
|
|
like :variable:`CMAKE_<LANG>_FLAGS`, unknown flags in such variables may
|
|
cause a false negative for this check.
|
|
#]=======================================================================]
|
|
|
|
include_guard(GLOBAL)
|
|
include(Internal/CheckLinkerFlag)
|
|
|
|
function(CHECK_LINKER_FLAG _lang _flag _var)
|
|
cmake_check_linker_flag(${_lang} "${_flag}" ${_var})
|
|
endfunction()
|