1# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
2# file Copyright.txt or https://cmake.org/licensing for details.
3
4#[=======================================================================[.rst:
5TestCXXAcceptsFlag
6------------------
7
8.. deprecated:: 3.0
9
10  See :module:`CheckCXXCompilerFlag`.
11
12Check if the CXX compiler accepts a flag.
13
14.. code-block:: cmake
15
16 CHECK_CXX_ACCEPTS_FLAG(<flags> <variable>)
17
18``<flags>``
19 the flags to try
20``<variable>``
21 variable to store the result
22#]=======================================================================]
23
24macro(CHECK_CXX_ACCEPTS_FLAG FLAGS  VARIABLE)
25  if(NOT DEFINED ${VARIABLE})
26    message(CHECK_START "Checking to see if CXX compiler accepts flag ${FLAGS}")
27    try_compile(${VARIABLE}
28      ${CMAKE_BINARY_DIR}
29      ${CMAKE_ROOT}/Modules/DummyCXXFile.cxx
30      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${FLAGS}
31      OUTPUT_VARIABLE OUTPUT)
32    if(${VARIABLE})
33      message(CHECK_PASS "yes")
34      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
35        "Determining if the CXX compiler accepts the flag ${FLAGS} passed with "
36        "the following output:\n${OUTPUT}\n\n")
37    else()
38      message(CHECK_FAIL "no")
39      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
40        "Determining if the CXX compiler accepts the flag ${FLAGS} failed with "
41        "the following output:\n${OUTPUT}\n\n")
42    endif()
43  endif()
44endmacro()
45