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.
79 lines
3.2 KiB
79 lines
3.2 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CheckCSourceRuns
|
|
----------------
|
|
|
|
Check if given C source compiles and links into an executable and can
|
|
subsequently be run.
|
|
|
|
.. command:: check_c_source_runs
|
|
|
|
.. code-block:: cmake
|
|
|
|
check_c_source_runs(<code> <resultVar>)
|
|
|
|
Check that the source supplied in ``<code>`` can be compiled as a C source
|
|
file, linked as an executable and then run. The ``<code>`` must contain at
|
|
least a ``main()`` function. If the ``<code>`` could be built and run
|
|
successfully, the internal cache variable specified by ``<resultVar>`` will
|
|
be set to 1, otherwise it will be set to an value that evaluates to boolean
|
|
false (e.g. an empty string or an error message).
|
|
|
|
The underlying check is performed by the :command:`try_run` command. The
|
|
compile and link commands can be influenced by setting any of the following
|
|
variables prior to calling ``check_c_source_runs()``:
|
|
|
|
``CMAKE_REQUIRED_FLAGS``
|
|
Additional flags to pass to the compiler. Note that the contents of
|
|
:variable:`CMAKE_C_FLAGS <CMAKE_<LANG>_FLAGS>` and its associated
|
|
configuration-specific variable are automatically added to the compiler
|
|
command before the contents of ``CMAKE_REQUIRED_FLAGS``.
|
|
|
|
``CMAKE_REQUIRED_DEFINITIONS``
|
|
A :ref:`;-list <CMake Language Lists>` of compiler definitions of the form
|
|
``-DFOO`` or ``-DFOO=bar``. A definition for the name specified by
|
|
``<resultVar>`` will also be added automatically.
|
|
|
|
``CMAKE_REQUIRED_INCLUDES``
|
|
A :ref:`;-list <CMake Language Lists>` of header search paths to pass to
|
|
the compiler. These will be the only header search paths used by
|
|
``try_run()``, i.e. the contents of the :prop_dir:`INCLUDE_DIRECTORIES`
|
|
directory property will be ignored.
|
|
|
|
``CMAKE_REQUIRED_LINK_OPTIONS``
|
|
.. versionadded:: 3.14
|
|
|
|
A :ref:`;-list <CMake Language Lists>` of options to add to the link
|
|
command (see :command:`try_run` for further details).
|
|
|
|
``CMAKE_REQUIRED_LIBRARIES``
|
|
A :ref:`;-list <CMake Language Lists>` of libraries to add to the link
|
|
command. These can be the name of system libraries or they can be
|
|
:ref:`Imported Targets <Imported Targets>` (see :command:`try_run` for
|
|
further details).
|
|
|
|
``CMAKE_REQUIRED_QUIET``
|
|
.. versionadded:: 3.1
|
|
|
|
If this variable evaluates to a boolean true value, all status messages
|
|
associated with the check will be suppressed.
|
|
|
|
The check is only performed once, with the result cached in the variable
|
|
named by ``<resultVar>``. Every subsequent CMake run will re-use this cached
|
|
value rather than performing the check again, even if the ``<code>`` changes.
|
|
In order to force the check to be re-evaluated, the variable named by
|
|
``<resultVar>`` must be manually removed from the cache.
|
|
|
|
#]=======================================================================]
|
|
|
|
include_guard(GLOBAL)
|
|
include(Internal/CheckSourceRuns)
|
|
|
|
macro(CHECK_C_SOURCE_RUNS SOURCE VAR)
|
|
set(_CheckSourceRuns_old_signature 1)
|
|
cmake_check_source_runs(C "${SOURCE}" ${VAR} ${ARGN})
|
|
unset(_CheckSourceRuns_old_signature)
|
|
endmacro()
|