cmake/Modules/TestCXXAcceptsFlag.cmake

# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#.rst:
# TestCXXAcceptsFlag
# ------------------
#
# Deprecated.  See :module:`CheckCXXCompilerFlag`.
#
# Check if the CXX compiler accepts a flag.
#
# .. code-block:: cmake
#
#  CHECK_CXX_ACCEPTS_FLAG(<flags> <variable>)
#
# ``<flags>``
#  the flags to try
# ``<variable>``
#  variable to store the result

macro(CHECK_CXX_ACCEPTS_FLAG FLAGS  VARIABLE)
  if(NOT DEFINED ${VARIABLE})
    message(STATUS "Checking to see if CXX compiler accepts flag ${FLAGS}")
    try_compile(${VARIABLE}
      ${CMAKE_BINARY_DIR}
      ${CMAKE_ROOT}/Modules/DummyCXXFile.cxx
      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${FLAGS}
      OUTPUT_VARIABLE OUTPUT)
    if(${VARIABLE})
      message(STATUS "Checking to see if CXX compiler accepts flag ${FLAGS} - yes")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
        "Determining if the CXX compiler accepts the flag ${FLAGS} passed with "
        "the following output:\n${OUTPUT}\n\n")
    else()
      message(STATUS "Checking to see if CXX compiler accepts flag ${FLAGS} - no")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
        "Determining if the CXX compiler accepts the flag ${FLAGS} failed with "
        "the following output:\n${OUTPUT}\n\n")
    endif()
  endif()
endmacro()