[cc65] Export symbols out of 'proc'-scope to file scope?

Hi,

I like to access a symbol in proc scope inside the file scope.
Haven't found something yet - any suggestions?

Example:

.proc SetValue
...
    sta SMC_Value
...
.endproc

.proc DoSomething
...
    lda #$12
SMC_Value = *-1
...
.endproc

BTW: It would be great to 'mark' somehow places where the
code is modified, like a pseudo instruction which is directly usable.
Something like

...
    lda #SMC_Value
...

Where 'SMC_Value' is the address of the place. Any (better) ideas for 
that too?

Regards
Christian

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