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.\" Copyright (c) 1991, 1992 Free Software Foundation |
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.\" See section COPYING for conditions for redistribution |
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.TH as 1 "21 January 1992" "cygnus support" "GNU Development Tools" |
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|
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.SH NAME |
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GNU as\-\-the portable GNU assembler. |
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|
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.SH SYNOPSIS |
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.na |
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.B as |
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.RB "[\|" \-a "\||\|" \-al "\||\|" -as\c |
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\&\|] |
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.RB "[\|" \-D "\|]" |
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.RB "[\|" \-f "\|]" |
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.RB "[\|" \-I |
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.I path\c |
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\&\|] |
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.RB "[\|" \-k "\|]" |
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.RB "[\|" \-L "\|]" |
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.RB "[\|" \-o |
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.I objfile\c |
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\&\|] |
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.RB "[\|" \-R "\|]" |
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.RB "[\|" \-v "\|]" |
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.RB "[\|" \-w "\|]" |
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.RB "[\|" \-\^\- "\ |\ " \c |
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.I files\c |
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\&\|.\|.\|.\|] |
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|
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.I i960-only options: |
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.br |
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.RB "[\|" \-ACA "\||\|" \-ACA_A "\||\|" \-ACB\c |
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.RB "\||\|" \-ACC "\||\|" \-AKA "\||\|" \-AKB\c |
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.RB "\||\|" \-AKC "\||\|" \-AMC "\|]" |
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.RB "[\|" \-b "\|]" |
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.RB "[\|" \-norelax "\|]" |
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|
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.I m680x0-only options: |
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.br |
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.RB "[\|" \-l "\|]" |
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.RB "[\|" \-mc68000 "\||\|" \-mc68010 "\||\|" \-mc68020 "\|]" |
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.ad b |
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|
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.SH DESCRIPTION |
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GNU \c |
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.B as\c |
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\& is really a family of assemblers. |
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If you use (or have used) the GNU assembler on one architecture, you |
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should find a fairly similar environment when you use it on another |
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architecture. Each version has much in common with the others, |
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including object file formats, most assembler directives (often called |
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\c |
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.I pseudo-ops)\c |
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\& and assembler syntax. |
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|
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For information on the syntax and pseudo-ops used by GNU \c |
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.B as\c |
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\&, see `\|\c |
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.B as\c |
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\|' entry in \c |
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.B info \c |
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(or the manual \c |
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.I |
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.I |
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Using as: The GNU Assembler\c |
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\&). |
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|
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\c |
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.B as\c |
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\& is primarily intended to assemble the output of the GNU C |
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compiler \c |
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.B gcc\c |
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\& for use by the linker \c |
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.B ld\c |
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\&. Nevertheless, |
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we've tried to make \c |
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.B as\c |
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\& assemble correctly everything that the native |
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assembler would. |
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This doesn't mean \c |
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.B as\c |
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\& always uses the same syntax as another |
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assembler for the same architecture; for example, we know of several |
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incompatible versions of 680x0 assembly language syntax. |
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|
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Each time you run \c |
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.B as\c |
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\& it assembles exactly one source |
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program. The source program is made up of one or more files. |
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(The standard input is also a file.) |
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|
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If \c |
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.B as\c |
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\& is given no file names it attempts to read one input file |
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from the \c |
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.B as\c |
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\& standard input, which is normally your terminal. You |
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may have to type \c |
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.B ctl-D\c |
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\& to tell \c |
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.B as\c |
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\& there is no more program |
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to assemble. Use `\|\c |
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.B \-\^\-\c |
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\|' if you need to explicitly name the standard input file |
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in your command line. |
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|
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.B as\c |
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\& may write warnings and error messages to the standard error |
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file (usually your terminal). This should not happen when \c |
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.B as\c |
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\& is |
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run automatically by a compiler. Warnings report an assumption made so |
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that \c |
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.B as\c |
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\& could keep assembling a flawed program; errors report a |
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grave problem that stops the assembly. |
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|
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.SH OPTIONS |
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.TP |
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.BR \-a \||\| \-al \||\| \-as |
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Turn on assembly listings; `\|\c |
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.B \-al\c |
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\&\|', listing only, `\|\c |
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.B \-as\c |
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\&\|', symbols |
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only, `\|\c |
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.B \-a\c |
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\&\|', everything. |
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.TP |
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.B \-D |
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This option is accepted only for script compatibility with calls to |
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other assemblers; it has no effect on \c |
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.B as\c |
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\&. |
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.TP |
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.B \-f |
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``fast''--skip preprocessing (assume source is compiler output). |
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.TP |
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.BI "\-I\ " path |
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Add |
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.I path |
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to the search list for |
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.B .include |
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directives. |
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.TP |
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.B \-k |
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Issue warnings when difference tables altered for long displacements. |
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.TP |
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.B \-L |
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Keep (in symbol table) local symbols, starting with `\|\c |
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.B L\c |
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\|' |
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.TP |
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.BI "\-o\ " objfile |
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Name the object-file output from \c |
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.B as |
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.TP |
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.B \-R |
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Fold data section into text section |
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.TP |
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.B \-v |
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Announce \c |
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.B as\c |
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\& version |
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.TP |
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.B \-W |
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Suppress warning messages |
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.TP |
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.IR "\-\^\-" "\ |\ " "files\|.\|.\|." |
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Source files to assemble, or standard input (\c |
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.BR "\-\^\-" ")" |
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.TP |
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.BI \-A var |
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.I |
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(When configured for Intel 960.) |
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Specify which variant of the 960 architecture is the target. |
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.TP |
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.B \-b |
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.I |
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(When configured for Intel 960.) |
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Add code to collect statistics about branches taken. |
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.TP |
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.B \-norelax |
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.I |
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(When configured for Intel 960.) |
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Do not alter compare-and-branch instructions for long displacements; |
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error if necessary. |
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.TP |
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.B \-l |
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.I |
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(When configured for Motorola 68000). |
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.br |
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Shorten references to undefined symbols, to one word instead of two. |
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.TP |
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.BR "\-mc68000" "\||\|" "\-mc68010" "\||\|" "\-mc68020" |
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.I |
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(When configured for Motorola 68000). |
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.br |
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Specify what processor in the 68000 family is the target (default 68020) |
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|
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.PP |
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Options may be in any order, and may be |
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before, after, or between file names. The order of file names is |
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significant. |
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|
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`\|\c |
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.B \-\^\-\c |
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\|' (two hyphens) by itself names the standard input file |
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explicitly, as one of the files for \c |
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.B as\c |
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\& to assemble. |
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|
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Except for `\|\c |
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.B \-\^\-\c |
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\|' any command line argument that begins with a |
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hyphen (`\|\c |
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.B \-\c |
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\|') is an option. Each option changes the behavior of |
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\c |
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.B as\c |
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\&. No option changes the way another option works. An |
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option is a `\|\c |
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.B \-\c |
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\|' followed by one or more letters; the case of |
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the letter is important. All options are optional. |
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|
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The `\|\c |
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.B \-o\c |
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\|' option expects exactly one file name to follow. The file |
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name may either immediately follow the option's letter (compatible |
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with older assemblers) or it may be the next command argument (GNU |
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standard). |
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|
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These two command lines are equivalent: |
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.br |
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.B |
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as\ \ \-o\ \ my\-object\-file.o\ \ mumble.s |
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.br |
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.B |
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as\ \ \-omy\-object\-file.o\ \ mumble.s |
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|
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.SH "SEE ALSO" |
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.RB "`\|" as "\|'" |
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entry in |
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.B |
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info\c |
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\&; |
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.I |
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Using as: The GNU Assembler\c |
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\&; |
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.BR gcc "(" 1 ")," |
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.BR ld "(" 1 ")." |
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|
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.SH COPYING |
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Copyright (c) 1991, 1992 Free Software Foundation, Inc. |
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.PP |
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Permission is granted to make and distribute verbatim copies of |
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this manual provided the copyright notice and this permission notice |
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are preserved on all copies. |
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.PP |
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Permission is granted to copy and distribute modified versions of this |
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manual under the conditions for verbatim copying, provided that the |
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entire resulting derived work is distributed under the terms of a |
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permission notice identical to this one. |
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.PP |
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Permission is granted to copy and distribute translations of this |
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manual into another language, under the above conditions for modified |
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versions, except that this permission notice may be included in |
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translations approved by the Free Software Foundation instead of in |
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the original English. |
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