gcc/config/rtems.h

/* Configuration common to all targets running RTEMS. 
   Copyright (C) 2000-2018 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.

   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.

   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   <http://www.gnu.org/licenses/>.  */

/* The system headers under RTEMS are C++-aware.  */
#undef NO_IMPLICIT_EXTERN_C
#define NO_IMPLICIT_EXTERN_C

/*
 * Dummy start/end specification to let linker work as
 * needed by autoconf scripts using this compiler.
 */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "crt0.o%s"

#undef ENDFILE_SPEC
#define ENDFILE_SPEC   ""

/*
 * Some targets do not set up LIB_SPECS, override it, here.
 */
#define STD_LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"

#undef LIB_SPEC
#define LIB_SPEC "%{!qrtems: " STD_LIB_SPEC "} " \
"%{!nostdlib: %{qrtems: --start-group \
 -lrtemsbsp -lrtemscpu \
 -latomic -lc -lgcc --end-group %{!qnolinkcmds: -T linkcmds%s}}}"

#define TARGET_POSIX_IO

/* Prefer int for int32_t (see stdint-newlib.h).  */
#undef STDINT_LONG32
#define STDINT_LONG32 (INT_TYPE_SIZE != 32 && LONG_TYPE_SIZE == 32)