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Difference between .comm and .globl + .zerofill

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Difference between .comm and .globl + .zerofill

Subject: Difference between .comm and .globl + .zerofill
From: Jonas Maebe <email@hidden>
Date: Thu, 16 Jun 2005 19:34:18 +0200

Hello,

What is the practical difference between the following two (assembler) declarations, apart from the fact that the former cannot be used in dynamic libraries and the latter can be?

.text
.align 2
.comm   _a, 4

and

.globl _a
.data
.zerofill __DATA, __common, _a, 4, 2

Thanks,


Jonas
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