ARM VERSION 1.2 - Manual (Page 286)

Directives Reference
7-4 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
7.2.1 GBLA, GBLL, and GBLS
The GBLA directive declares a global arithmetic variable, and initializes its value to 0.
The GBLL directive declares a global logical variable, and initializes its value to {FALSE} .
The GBLS directive declares a global string variable and initializes its value to a null
string, "" .
Syntax
<gblx> variable
where:
<gblx>
is one of GBLA , GBLL , or GBLS .
variable is the name of the variable. variable must be unique amongst symbols
within a source file.
Usage
Using one of these directives for a variable that is already defined re-initializes the
variable to the same values given above.
The scope of the variable is limited to the source file that contains it.
Set the value of the variable with a SETA , SETL , or SETS directive (see SETA, SETL, and
SETS on page 7-7).
See LCLA, LCLL, and LCLS on page 7-6 for information on declaring local variables.
Global variables can also be set with the -predefine assembler command-line option.
See Command syntax on page 3-2 for more information.