gcc/config/avr/avrlibc.h

   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
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along 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"