summaryrefslogtreecommitdiff
path: root/Modules/TestCXXAcceptsFlag.cmake
blob: 69e2b42b9cbd12e6ca021b24bbd18c544c95ca42 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
#
# Check if the CXX compiler accepts a flag
#
# CHECK_FUNCTION_EXISTS - macro which checks if the function exists
# FLAG - the flags to try
# VARIABLE - variable to store the result
#

MACRO(CHECK_CXX_ACCEPTS_FLAG FLAGS  VARIABLE)
  MESSAGE(STATUS "Checking to see if CXX compiler acepts 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 acepts flag ${FLAGS} - yes")
  ELSE(${VARIABLE})
    FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
      "Determining if the CXX compiler accepts the flag ${FLAGS} failed with the following output:\n${OUTPUT}\n")
  ENDIF(${VARIABLE})
ENDMACRO(CHECK_CXX_ACCEPTS_FLAG)