GNU assembler (GNU Binutils) 2.26.20160125 Copyright (C) 2015 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or later. This program has absolutely no warranty. This assembler was configured for a target of `avr'.

Usage: avr-as [option...] [asmfile...] Options: -a[sub-option...] turn on listings Sub-options [default hls]: c omit false conditionals d omit debugging directives g include general info h include high-level source l include assembly m include macro expansions n omit forms processing s include symbols =FILE list to FILE (must be last sub-option) --alternate initially turn on alternate macro syntax --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}] compress DWARF debug sections using zlib --nocompress-debug-sections don't compress DWARF debug sections [default] -D produce assembler debugging messages --debug-prefix-map OLD=NEW map OLD to NEW in debug information --defsym SYM=VAL define symbol SYM to given value --execstack require executable stack for this object --noexecstack don't require executable stack for this object --size-check=[error|warning] ELF .size directive check (default --size-check=error) --sectname-subst enable section name substitution sequences -f skip whitespace and comment preprocessing -g --gen-debug generate debugging information --gstabs generate STABS debugging information --gstabs+ generate STABS debug info with GNU extensions --gdwarf-2 generate DWARF2 debugging information --gdwarf-sections generate per-function section names for DWARF line information --hash-size=<value> set the hash table size close to <value> --help show this message and exit --target-help show target specific options -I DIR add DIR to search list for .include directives -J don't warn about signed overflow -K warn when differences altered for long displacements -L,--keep-locals keep local symbols (e.g. starting with `L') -M,--mri assemble in MRI compatibility mode --MD FILE write dependency information in FILE (default none) -nocpp ignored -o OBJFILE name the object-file output OBJFILE (default a.out) -R fold data section into text section --reduce-memory-overheads prefer smaller memory use at the cost of longer assembly times --statistics print various measured statistics from execution --strip-local-absolute strip local absolute symbols --traditional-format Use same format as native assembler when possible --version print assembler version number and exit -W --no-warn suppress warnings --warn don't suppress warnings --fatal-warnings treat warnings as errors -w ignored -X ignored -Z generate object file even after errors --listing-lhs-width set the width in words of the output data column of the listing --listing-lhs-width2 set the width in words of the continuation lines of the output data column; ignored if smaller than the width of the first line --listing-rhs-width set the max width in characters of the lines from the source file --listing-cont-lines set the maximum number of continuation lines used for the output data column of the listing @FILE read options from FILE AVR Assembler options: -mmcu=[avr-name] select microcontroller variant [avr-name] can be: avr1 - classic AVR core without data RAM avr2 - classic AVR core with up to 8K program memory avr25 - classic AVR core with up to 8K program memory plus the MOVW instruction avr3 - classic AVR core with up to 64K program memory avr31 - classic AVR core with up to 128K program memory avr35 - classic AVR core with up to 64K program memory plus the MOVW instruction avr4 - enhanced AVR core with up to 8K program memory avr5 - enhanced AVR core with up to 64K program memory avr51 - enhanced AVR core with up to 128K program memory avr6 - enhanced AVR core with up to 256K program memory avrxmega2 - XMEGA, > 8K, < 64K FLASH, < 64K RAM avrxmega3 - XMEGA, > 8K, <= 64K FLASH, > 64K RAM avrxmega4 - XMEGA, > 64K, <= 128K FLASH, <= 64K RAM avrxmega5 - XMEGA, > 64K, <= 128K FLASH, > 64K RAM avrxmega6 - XMEGA, > 128K, <= 256K FLASH, <= 64K RAM avrxmega7 - XMEGA, > 128K, <= 256K FLASH, > 64K RAM avrtiny - AVR Tiny core with 16 gp registers -mall-opcodes accept all AVR opcodes, even if not supported by MCU -mno-skip-bug disable warnings for skipping two-word instructions (default for avr4, avr5) -mno-wrap reject rjmp/rcall instructions with 8K wrap-around (default for avr3, avr5) -mrmw accept Read-Modify-Write instructions -mlink-relax generate relocations for linker relaxation (default) -mno-link-relax don't generate relocations for linker relaxation. -mnon-bit-addressable-registers-mask=<32 bit mask> Specify non bit addressable registers mask. Known MCU names: avr1 avr2 avr25 avr3 avr31 avr35 avr4 avr5 avr51 avr6 avrxmega1 avrxmega2 avrxmega3 avrxmega4 avrxmega5 avrxmega6 avrxmega7 avrtiny at90s1200 attiny11 attiny12 attiny15 attiny28 at90s2313 at90s2323 at90s2333 at90s2343 attiny22 attiny26 at90s4414 at90s4433 at90s4434 at90s8515 at90c8534 at90s8535 ata5272 attiny13 attiny13a attiny2313 attiny2313a attiny24 attiny24a attiny4313 attiny44 attiny44a attiny84 attiny84a attiny25 attiny45 attiny85 attiny261 attiny261a attiny461 attiny461a attiny861 attiny861a attiny87 attiny43u attiny48 attiny88 attiny828 at86rf401 at43usb355 at76c711 atmega103 at43usb320 attiny167 at90usb82 at90usb162 ata5505 atmega8u2 atmega16u2 atmega32u2 attiny1634 atmega8 atmega8a ata6285 ata6286 ata6289 atmega48 atmega48a atmega48pa atmega48p atmega88 atmega88a atmega88p atmega88pa atmega8515 atmega8535 atmega8hva at90pwm1 at90pwm2 at90pwm2b at90pwm3 at90pwm3b at90pwm81 at90pwm161 ata5790 ata5795 atmega16 atmega16a atmega161 atmega162 atmega163 atmega164a atmega164p atmega164pa atmega165 atmega165a atmega165p atmega165pa atmega168 atmega168a atmega168p atmega168pa atmega169 atmega169a atmega169p atmega169pa atmega32 atmega32a atmega323 atmega324a atmega324p atmega324pa atmega325 atmega325a atmega325p atmega325pa atmega3250 atmega3250a atmega3250p atmega3250pa atmega328 atmega328p atmega329 atmega329a atmega329p atmega329pa atmega3290 atmega3290a atmega3290p atmega3290pa atmega406 atmega64rfr2 atmega644rfr2 atmega64 atmega64a atmega640 atmega644 atmega644a atmega644p atmega644pa atmega645 atmega645a atmega645p atmega649 atmega649a atmega649p atmega6450 atmega6450a atmega6450p atmega6490 atmega6490a atmega6490p atmega64rfr2 atmega644rfr2 atmega16hva atmega16hva2 atmega16hvb atmega16hvbrevb atmega32hvb atmega32hvbrevb atmega64hve at90can32 at90can64 at90pwm161 at90pwm216 at90pwm316 atmega32c1 atmega64c1 atmega16m1 atmega32m1 atmega64m1 atmega16u4 atmega32u4 atmega32u6 at90usb646 at90usb647 at90scr100 at94k m3000 atmega128 atmega128a atmega1280 atmega1281 atmega1284 atmega1284p atmega128rfa1 atmega128rfr2 atmega1284rfr2 at90can128 at90usb1286 at90usb1287 atmega2560 atmega2561 atmega256rfr2 atmega2564rfr2 atxmega16a4 atxmega16a4u atxmega16c4 atxmega16d4 atxmega32a4 atxmega32a4u atxmega32c4 atxmega32d4 atxmega32e5 atxmega16e5 atxmega8e5 atxmega32x1 atxmega64a3 atxmega64a3u atxmega64a4u atxmega64b1 atxmega64b3 atxmega64c3 atxmega64d3 atxmega64d4 atxmega64a1 atxmega64a1u atxmega128a3 atxmega128a3u atxmega128b1 atxmega128b3 atxmega128c3 atxmega128d3 atxmega128d4 atxmega192a3 atxmega192a3u atxmega192c3 atxmega192d3 atxmega256a3 atxmega256a3u atxmega256a3b atxmega256a3bu atxmega256c3 atxmega256d3 atxmega384c3 atxmega384d3 atxmega128a1 atxmega128a1u atxmega128a4u attiny4 attiny5 attiny9 attiny10 attiny20 attiny40 Report bugs to <http://www.sourceware.org/bugzilla/>