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-rw-r--r--Modules/TestCXXAcceptsFlag.cmake36
1 files changed, 19 insertions, 17 deletions
diff --git a/Modules/TestCXXAcceptsFlag.cmake b/Modules/TestCXXAcceptsFlag.cmake
index d559b9a..9b2f324 100644
--- a/Modules/TestCXXAcceptsFlag.cmake
+++ b/Modules/TestCXXAcceptsFlag.cmake
@@ -7,21 +7,23 @@
#
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")
- FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
- "Determining if the CXX compiler accepts the flag ${FLAGS} passed with "
- "the following output:\n${OUTPUT}\n\n")
- ELSE(${VARIABLE})
- MESSAGE(STATUS "Checking to see if CXX compiler acepts flag ${FLAGS} - no")
- FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
- "Determining if the CXX compiler accepts the flag ${FLAGS} failed with "
- "the following output:\n${OUTPUT}\n\n")
- ENDIF(${VARIABLE})
+ IF(DEFINED ${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")
+ FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
+ "Determining if the CXX compiler accepts the flag ${FLAGS} passed with "
+ "the following output:\n${OUTPUT}\n\n")
+ ELSE(${VARIABLE})
+ MESSAGE(STATUS "Checking to see if CXX compiler acepts flag ${FLAGS} - no")
+ FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
+ "Determining if the CXX compiler accepts the flag ${FLAGS} failed with "
+ "the following output:\n${OUTPUT}\n\n")
+ ENDIF(${VARIABLE})
+ ENDIF(DEFINED ${VARIABLE})
ENDMACRO(CHECK_CXX_ACCEPTS_FLAG)