| ; Options for the ATMEL AVR port of the compiler. |
| |
| ; Copyright (C) 2005-2014 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_mcu_index) Init(0) Enum(avr_mcu) |
| -mmcu=MCU Select the target MCU |
| |
| mdeb |
| Target Report Undocumented Mask(ALL_DEBUG) |
| |
| mlog= |
| Target RejectNegative Joined Undocumented Var(avr_log_details) |
| |
| 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. |
| |
| 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 outpoing 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. |
| |
| mfract-convert-truncate |
| Target Report Mask(FRACT_CONV_TRUNC) |
| Allow to use truncation instead of rounding towards 0 for fractional int types |
