Thread: Static variable usage

  1. #1
    Registered User
    Join Date
    Apr 2008
    Posts
    83

    Static variable usage

    Dear All,
    I have one doubt in static variable:-

    file 1:- BSISCOOR_Coordinator_COMMON.C contains one variable
    {

    STATIC UWORD gs_BSISCOOR_CvrtCycCounter_UW;
    }
    Now i wanted to use this variable in another file. first i declared above variable in one defination file as follows:
    defination file: PSWASW_CustomerSpecific_BB29047.h
    {
    Code:
     
                    extern UWORD gs_BSISCOOR_CvrtCycCounter_UW;
                  }
    I have included above defination file in my file2 as follows:-
    file 2: - DIO_DigitalOutput_BB63215.C
    {
    [code]
    #include PSWASW_CustomerSpecific_BB29047.h
    [\code]
    }

    When i compile above file i am getting following error:-
    i am using VC++ compiler.

    ### Syntax checking ..\PSW\HSW\HSW15_COMMON\BSISCOOR_COMMON\SRC\BSISCO OR_COORDINATOR_COMMON.ESC...
    "..\Psw\HSW\HSW15_COMMON\BSISCOOR_COMMON\SRC\BSISC OOR_Coordinator_COMMON.ESC", line 1767: error #174-D:
    external/internal linkage conflict with previous declaration
    STATIC UWORD gs_BSISCOOR_CvrtCycCounter_UW;


    Where i am going mistake?

    Thanks in advance
    Swetha

  2. #2
    Officially An Architect brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,396
    A static variable, by definition, is not visible to other modules. You need to remove the static completely. Global variables are bad anyway.
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

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