V3/usr/man/man1/as.1

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.he 'AS (I)'1/15/73'AS (I)'
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NAME		as -- assembler
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SYNOPSIS	as__ [ -_ ] name918 ...
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DESCRIPTION	as__
assembles the concatenation of name\d1\u, ....
If the optional first argument
-_ is used,
all undefined symbols in the assembly
are treated as global.

The output of the assembly is left on the file "a.out".
It is executable if no errors occurred
during the assembly.

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FILES		/etc/as2	pass 2 of the assembler
.br
/tmp/atm1?	temporary
.br
/tmp/atm2?	temporary
.br
/tmp/atm3?	temporary
.br
a.out		object
.sp
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SEE ALSO	ld(I),
nm(I),
un(I),
db(I),
a.out(V),
"UNIX Assembler Manual".
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DIAGNOSTICS	When
an input file cannot be read, its name
followed by a question mark is typed and assembly
ceases.
When syntactic or semantic errors occur, a single-character diagnostic is typed out
together with the line number and the file name in which it
occurred.  Errors in pass 1 cause cancellation of pass 2.
The possible errors are:
.sp
.in +6
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)  parentheses error
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]  parentheses error
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<  String not terminated properly
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*  Indirection ("*_") used illegally
.ti -6
.li
.  Illegal assignment to "."
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A  error in A_ddress
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B  B_ranch instruction is odd or too remote
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E  error in E_xpression
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F  error in local ("F_" or "b") type symbol
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G  G_arbage (unknown) character
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I  End of file inside an If__
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M  M_ultiply defined symbol as label
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O  O_dd-- word quantity assembled at odd address
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P  P_hase error-- "." different in pass 1 and 2
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R  R_elocation error
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U  U_ndefined symbol
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X  syntaX_ error
.in -6
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BUGS		Symbol table overflow is not checked.