fix build failure on OS X Lion with XCode 4.2
XCode 4.2 generates a broken binary if -fomit-frame-pointer and/or -flto is used for compile and link flags. Check for Clang version less than 4.3 on APPLE and remove these flags in the compile options setting cmake code.
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@ -275,7 +275,7 @@ ENDIF()
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# Compiler flags
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# Compiler flags
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IF(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
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IF(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL Clang)
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SET(LTO_FLAG "")
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SET(LTO_FLAG "")
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IF(ENABLE_LTO)
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IF(ENABLE_LTO)
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IF(CMAKE_COMPILER_IS_GNUCXX)
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IF(CMAKE_COMPILER_IS_GNUCXX)
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@ -286,7 +286,12 @@ IF(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
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ENDIF(ENABLE_LTO)
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ENDIF(ENABLE_LTO)
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# common optimization flags
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# common optimization flags
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IF(NOT (APPLE AND CMAKE_CXX_COMPILER_ID STREQUAL Clang AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.3))
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SET(MY_C_OPT_FLAGS -O2 -mtune=generic -fomit-frame-pointer ${LTO_FLAG})
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SET(MY_C_OPT_FLAGS -O2 -mtune=generic -fomit-frame-pointer ${LTO_FLAG})
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ELSE()
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# LTO and -fomit-frame-pointer generate broken binaries on Lion with XCode 4.2 tools
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SET(MY_C_OPT_FLAGS -O2 -mtune=generic)
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ENDIF()
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# common debug flags
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# common debug flags
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IF(CMAKE_COMPILER_IS_GNUCXX)
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IF(CMAKE_COMPILER_IS_GNUCXX)
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