Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/avr/avr.opt @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
rev | line source |
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0 | 1 ; Options for the ATMEL AVR port of the compiler. |
2 | |
131 | 3 ; Copyright (C) 2005-2018 Free Software Foundation, Inc. |
0 | 4 ; |
5 ; This file is part of GCC. | |
6 ; | |
7 ; GCC is free software; you can redistribute it and/or modify it under | |
8 ; the terms of the GNU General Public License as published by the Free | |
9 ; Software Foundation; either version 3, or (at your option) any later | |
10 ; version. | |
11 ; | |
12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 ; for more details. | |
16 ; | |
17 ; You should have received a copy of the GNU General Public License | |
18 ; along with GCC; see the file COPYING3. If not see | |
19 ; <http://www.gnu.org/licenses/>. | |
20 | |
21 mcall-prologues | |
22 Target Report Mask(CALL_PROLOGUES) | |
111 | 23 Use subroutines for function prologues and epilogues. |
0 | 24 |
25 mmcu= | |
111 | 26 Target RejectNegative Joined Var(avr_mmcu) MissingArgError(missing device or architecture after %qs) |
27 -mmcu=MCU Select the target MCU. | |
28 | |
29 mgas-isr-prologues | |
30 Target Report Var(avr_gasisr_prologues) UInteger Init(0) | |
31 Allow usage of __gcc_isr pseudo instructions in ISR prologues and epilogues. | |
32 | |
33 mn-flash= | |
34 Target RejectNegative Joined Var(avr_n_flash) UInteger Init(-1) | |
35 Set the number of 64 KiB flash segments. | |
36 | |
37 mskip-bug | |
38 Target Report Mask(SKIP_BUG) | |
39 Indicate presence of a processor erratum. | |
40 | |
41 mrmw | |
42 Target Report Mask(RMW) | |
43 Enable Read-Modify-Write (RMW) instructions support/use. | |
0 | 44 |
45 mdeb | |
46 Target Report Undocumented Mask(ALL_DEBUG) | |
47 | |
111 | 48 mlog= |
49 Target RejectNegative Joined Undocumented Var(avr_log_details) | |
50 | |
51 mshort-calls | |
52 Target Report RejectNegative Mask(SHORT_CALLS) | |
53 Use RJMP / RCALL even though CALL / JMP are available. | |
54 | |
0 | 55 mint8 |
56 Target Report Mask(INT8) | |
111 | 57 Use an 8-bit 'int' type. |
0 | 58 |
59 mno-interrupts | |
60 Target Report RejectNegative Mask(NO_INTERRUPTS) | |
111 | 61 Change the stack pointer without disabling interrupts. |
62 | |
63 mbranch-cost= | |
64 Target Report Joined RejectNegative UInteger Var(avr_branch_cost) Init(0) | |
65 Set the branch costs for conditional branch instructions. Reasonable values are small, non-negative integers. The default branch cost is 0. | |
0 | 66 |
131 | 67 mmain-is-OS_task |
68 Target Report Mask(MAIN_IS_OS_TASK) | |
69 Treat main as if it had attribute OS_task. | |
70 | |
0 | 71 morder1 |
72 Target Report Undocumented Mask(ORDER_1) | |
73 | |
74 morder2 | |
75 Target Report Undocumented Mask(ORDER_2) | |
76 | |
77 mtiny-stack | |
78 Target Report Mask(TINY_STACK) | |
111 | 79 Change only the low 8 bits of the stack pointer. |
0 | 80 |
81 mrelax | |
82 Target Report | |
111 | 83 Relax branches. |
0 | 84 |
85 mpmem-wrap-around | |
86 Target Report | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
87 Make the linker relaxation machine assume that a program counter wrap-around occurs. |
111 | 88 |
89 maccumulate-args | |
90 Target Report Mask(ACCUMULATE_OUTGOING_ARGS) | |
91 Accumulate outgoing function arguments and acquire/release the needed stack space for outgoing function arguments in function prologue/epilogue. Without this option, outgoing arguments are pushed before calling a function and popped afterwards. This option can lead to reduced code size for functions that call many functions that get their arguments on the stack like, for example printf. | |
92 | |
93 mstrict-X | |
94 Target Report Var(avr_strict_X) Init(0) | |
95 When accessing RAM, use X as imposed by the hardware, i.e. just use pre-decrement, post-increment and indirect addressing with the X register. Without this option, the compiler may assume that there is an addressing mode X+const similar to Y+const and Z+const and emit instructions to emulate such an addressing mode for X. | |
96 | |
97 ;; For rationale behind -msp8 see explanation in avr.h. | |
98 msp8 | |
99 Target Report RejectNegative Var(avr_sp8) Init(0) | |
100 The device has no SPH special function register. This option will be overridden by the compiler driver with the correct setting if presence/absence of SPH can be deduced from -mmcu=MCU. | |
101 | |
102 Waddr-space-convert | |
103 Warning C Report Var(avr_warn_addr_space_convert) Init(0) | |
104 Warn if the address space of an address is changed. | |
105 | |
106 Wmisspelled-isr | |
107 Warning C C++ Report Var(avr_warn_misspelled_isr) Init(1) | |
108 Warn if the ISR is misspelled, i.e. without __vector prefix. Enabled by default. | |
109 | |
110 mfract-convert-truncate | |
111 Target Report Mask(FRACT_CONV_TRUNC) | |
112 Allow to use truncation instead of rounding towards zero for fractional fixed-point types. | |
113 | |
114 mabsdata | |
115 Target Report Mask(ABSDATA) | |
116 Assume that all data in static storage can be accessed by LDS / STS. This option is only useful for reduced Tiny devices. | |
117 | |
118 nodevicelib | |
119 Driver Target Report RejectNegative | |
120 Do not link against the device-specific library lib<MCU>.a. |