avrlibc.h revision 1.4 
1/* Definitions of target machine for the GNU compiler collection
2   for Atmel AVR micro controller if configured for AVR-Libc.
3   Copyright (C) 2012-2016 Free Software Foundation, Inc.
4   Contributed by Georg-Johann Lay (avr@gjlay.de)
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 3, or (at your option)
11any later version.
12
13GCC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING3.  If not see
20<http://www.gnu.org/licenses/>.  */
21
22#undef  LIB_SPEC
23#define LIB_SPEC                                \
24  "%{!mmcu=avr1:-lc} %(avrlibc_devicelib)"
25
26// AVR-Libc implements functions from libgcc.a in libm.a, see PR54461.
27// For a list of functions which are provided by libm.a and are
28// omitted from libgcc.a see libgcc's t-avrlibc.
29
30#undef  LIBGCC_SPEC
31#define LIBGCC_SPEC                             \
32  "%{!mmcu=avr1:-lgcc -lm}"
33
34#undef  STARTFILE_SPEC
35#define STARTFILE_SPEC                          \
36  " %(avrlibc_startfile) "
37
38#undef  LINK_GCC_C_SEQUENCE_SPEC
39#define LINK_GCC_C_SEQUENCE_SPEC \
40  "--start-group %G %L --end-group"
41