linker error

[cppdev]

How can i fix this error? I am confused about what it means.

[Linker Warning] Public symbol '_FieldDefinition' defined in both module C:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\RECEIPTGENERATOR\UNIT1.OBJ and C:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\RECEIPTGENERATOR\UNIT2.OBJ


Thanks in advance.

cppdev

 

[cppdev]

I have tried including header file "unit2.h" in unit1.cpp and tried including it in in unit1.h (just including it in one file at a time) and i still get the same error.

I believe since i am including the file "unit2.h" (where FieldDefinition is defined as a class) it defines this variable 2 times in the project.

I need the variable in both .cpp files how can i do this?


Thanks,
cppdev

 

[bNasty]

Try the "extern" for that variable in one of the .cpp files. It should do the job

 

[cppdev]

Good point.

shouldnt the syntax be :

extern FieldDefinitionObject FieldDefinition;

where FieldDefinitionObject is the Class defined in unit2.h .


and just put the above "extern" statement in unit1.cpp or unit1.h ?


It keeps telling me FieldDefinition is not defined yet.

 

[cppdev]

It seems i was wrong about the use of "extern".

should I put the keyword "extern" before the definition of the class, and put this class definition in a seperate header file ( global.h ) and put "#include "global.h" in both unit1.cpp and unit2.cpp ?

 

[2ffat]

I shooting in the dark here but can you use a namespace in this case?


James P. Cottingham

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