blob: 5b19391639ecb5bfd47a2375e97bbc55e4c0f726 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
; Options for the ATMEL AVR port of the compiler.
; Copyright (C) 2005-2019 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 3, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
; for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING3. If not see
; <http://www.gnu.org/licenses/>.
mcall-prologues
Target Report Mask(CALL_PROLOGUES)
Use subroutines for function prologues and epilogues.
mmcu=
Target RejectNegative Joined Var(avr_mmcu) MissingArgError(missing device or architecture after %qs)
-mmcu=MCU Select the target MCU.
mgas-isr-prologues
Target Report Var(avr_gasisr_prologues) UInteger Init(0)
Allow usage of __gcc_isr pseudo instructions in ISR prologues and epilogues.
mn-flash=
Target RejectNegative Joined Var(avr_n_flash) UInteger Init(-1)
Set the number of 64 KiB flash segments.
mskip-bug
Target Report Mask(SKIP_BUG)
Indicate presence of a processor erratum.
mrmw
Target Report Mask(RMW)
Enable Read-Modify-Write (RMW) instructions support/use.
mdeb
Target Report Undocumented Mask(ALL_DEBUG)
mlog=
Target RejectNegative Joined Undocumented Var(avr_log_details)
mshort-calls
Target Report RejectNegative Mask(SHORT_CALLS)
Use RJMP / RCALL even though CALL / JMP are available.
mint8
Target Report Mask(INT8)
Use an 8-bit 'int' type.
mno-interrupts
Target Report RejectNegative Mask(NO_INTERRUPTS)
Change the stack pointer without disabling interrupts.
mbranch-cost=
Target Report Joined RejectNegative UInteger Var(avr_branch_cost) Init(0)
Set the branch costs for conditional branch instructions. Reasonable values are small, non-negative integers. The default branch cost is 0.
mmain-is-OS_task
Target Report Mask(MAIN_IS_OS_TASK)
Treat main as if it had attribute OS_task.
morder1
Target Report Undocumented Mask(ORDER_1)
morder2
Target Report Undocumented Mask(ORDER_2)
mtiny-stack
Target Report Mask(TINY_STACK)
Change only the low 8 bits of the stack pointer.
mrelax
Target Report
Relax branches.
mpmem-wrap-around
Target Report
Make the linker relaxation machine assume that a program counter wrap-around occurs.
maccumulate-args
Target Report Mask(ACCUMULATE_OUTGOING_ARGS)
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.
mstrict-X
Target Report Var(avr_strict_X) Init(0)
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.
;; For rationale behind -msp8 see explanation in avr.h.
msp8
Target Report RejectNegative Var(avr_sp8) Init(0)
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.
Waddr-space-convert
Warning C Report Var(avr_warn_addr_space_convert) Init(0)
Warn if the address space of an address is changed.
Wmisspelled-isr
Warning C C++ Report Var(avr_warn_misspelled_isr) Init(1)
Warn if the ISR is misspelled, i.e. without __vector prefix. Enabled by default.
mfract-convert-truncate
Target Report Mask(FRACT_CONV_TRUNC)
Allow to use truncation instead of rounding towards zero for fractional fixed-point types.
mabsdata
Target Report Mask(ABSDATA)
Assume that all data in static storage can be accessed by LDS / STS. This option is only useful for reduced Tiny devices.
mdouble=
Target Report Joined RejectNegative Var(avr_double) Init(0) Enum(avr_bits_e)
-mdouble=<BITS> Use <BITS> bits wide double type.
mlong-double=
Target Report Joined RejectNegative Var(avr_long_double) Init(0) Enum(avr_bits_e)
-mlong-double=<BITS> Use <BITS> bits wide long double type.
nodevicelib
Driver Target Report RejectNegative
Do not link against the device-specific library lib<MCU>.a.
Enum
Name(avr_bits_e) Type(int)
Available BITS selections:
EnumValue
Enum(avr_bits_e) String(32) Value(32)
EnumValue
Enum(avr_bits_e) String(64) Value(64)
|
