Applying flags in CMake environment

I am a newbie to cmake. I want to add a new flag to be applied for my module build which uses cmake as build tool. Am trying to add the flag in CMakeLists.txt but the changes are not reflec开发者_运维问答ted. Should I apply the changes to some other file? I tried cleaning using $ cmake clean . but still the problem exists.

Request help.

Regards Santosh

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If you mean compiler flags then you can do something like below, note I am a newbie too so there might well be better ways:

   if( MSVC )
        set( CMAKE_CXX_FLAGS " /DWIN32 /W3 /GX /GR /Wp64 /Zc:forScope" )
        set( CMAKE_CXX_FLAGS_DEBUG " /D_DEBUG /MDd /Zi /Ob0 /Od /GZ /Gm /RTC1 /ZI" )
    elseif( CMAKE_COMPILER_IS_GNUCXX )
        set( CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} " -ansi -Winvalid-pch" )
    endif()