In assembly-language programs, .GLB is used to declare external symbol names (preceded by an underscore (_)).

In C/C++ programs, symbol names (not preceded by an underscore) are declared using the extern keyword.

[Example of assembly-language source]

     .glb _a, _b

     .SECTION D,ROMDATA,ALIGN=4

_a: .LWORD 1

_b: .LWORD 1

     .END

[Example of C source]

extern int a,b;

void f()

{

     a+=b;

}