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.Dd July 14, 2026
.Dt ASTER 1
.Os URSA
.Sh NAME
.Nm aster
.Nd assembler for the URSA architecture
.Sh SYNOPSIS
.Nm
.Op Fl s Ns | Ns Fl g
.Op Fl hv?
.Op Fl I Ar path
.Op Fl o Ar outfile
.Op Ar file
.Sh DESCRIPTION
The
.Nm
command creates a relocatable ELF object file
from an assembly language source
.Ar file .
If no
.Ar file
is specified,
or if
.Dq Sy \-
is specified as the
.Ar file
argument,
then the standard input is used.
As is tradition,
if no output file is named,
then output is written to a file named
.Dq Sy a.out .
Despite the name, this file is not in the a.out format of 4.3BSD.
.Sh OPTIONS
The following flags may be specified in any order.
.Bl -tag
.It Fl g
Print a representation of the program in GraphViz format
suitable for processing by
.Xr dot 1 .
It is an error to specify both this option and the
.Fl s
option.
.It Fl h , Fl \&?
Print a brief help message and exit.
.It Fl I Ar path
Add
.Ar path
to the list of directories to be searched for files included by
.Ic .include
directives.
If multiple
.Fl I
options are specified,
the named directories are searched in the order they were added.
.It Fl o Ar outfile
Write the resulting object to
.Ar outfile
instead of to
.Dq Sy a.out .
.It Fl s
Print a representation of the internal state upon exit.
It is an error to specify both this option and the
.Fl g
option.
.It Fl v
Print the version of the program and exit.
.El
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr dot 1 ,
.Xr starlink 1 ,
.Xr aster 5