gcc/config/avr/avrlibc.h

   1 /* Definitions for AVR 8-bit microcontrollers if configured for AVR-LibC.
   2    Copyright (C) 2012-2024 Free Software Foundation, Inc.
   3    Contributed by Georg-Johann Lay (avr@gjlay.de)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License 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 #undef  LIB_SPEC
  22 #define LIB_SPEC                                \
  23   "%{!mmcu=avr1:-lc} %(avrlibc_devicelib)"
  24
  25 // AVR-Libc implements functions from libgcc.a in libm.a, see PR54461.
  26 // For a list of functions which are provided by libm.a and are
  27 // omitted from libgcc.a see libgcc's t-avrlibc.
  28
  29 #undef  LIBGCC_SPEC
  30 #define LIBGCC_SPEC                             \
  31   "%{!mmcu=avr1:-lgcc -lm}"
  32
  33 #undef  STARTFILE_SPEC
  34 #define STARTFILE_SPEC                          \
  35   " %(avrlibc_startfile) "
  36
  37 #undef  LINK_GCC_C_SEQUENCE_SPEC
  38 #define LINK_GCC_C_SEQUENCE_SPEC \
  39   "--start-group %G %{!nolibc:%L} --end-group"