gcc/config/riscv/linux.h

   1 /* Definitions for RISC-V GNU/Linux systems with ELF format.
   2    Copyright (C) 1998-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #define TARGET_OS_CPP_BUILTINS()                                \
  21   do {                                                          \
  22     GNU_USER_TARGET_OS_CPP_BUILTINS();                          \
  23   } while (0)
  24
  25 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-riscv" XLEN_SPEC "-" ABI_SPEC ".so.1"
  26
  27 #define MUSL_ABI_SUFFIX \
  28   "%{mabi=ilp32:-sf}" \
  29   "%{mabi=ilp32f:-sp}" \
  30   "%{mabi=ilp32d:}" \
  31   "%{mabi=lp64:-sf}" \
  32   "%{mabi=lp64f:-sp}" \
  33   "%{mabi=lp64d:}"
  34
  35 #undef MUSL_DYNAMIC_LINKER
  36 #define MUSL_DYNAMIC_LINKER "/lib/ld-musl-riscv" XLEN_SPEC MUSL_ABI_SUFFIX ".so.1"
  37
  38 /* Because RISC-V only has word-sized atomics, it requries libatomic where
  39    others do not.  So link libatomic by default, as needed.  */
  40 #undef LIB_SPEC
  41 #ifdef LD_AS_NEEDED_OPTION
  42 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC \
  43   " %{pthread:" LD_AS_NEEDED_OPTION " -latomic " LD_NO_AS_NEEDED_OPTION "}"
  44 #else
  45 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC " -latomic "
  46 #endif
  47
  48 #define ICACHE_FLUSH_FUNC "__riscv_flush_icache"
  49
  50 #define CPP_SPEC "%{pthread:-D_REENTRANT}"
  51
  52 #define LD_EMUL_SUFFIX \
  53   "%{mabi=lp64d:}" \
  54   "%{mabi=lp64f:_lp64f}" \
  55   "%{mabi=lp64:_lp64}" \
  56   "%{mabi=ilp32d:}" \
  57   "%{mabi=ilp32f:_ilp32f}" \
  58   "%{mabi=ilp32:_ilp32}"
  59
  60 #define LINK_SPEC "\
  61 -melf" XLEN_SPEC "lriscv" LD_EMUL_SUFFIX " \
  62 %{mno-relax:--no-relax} \
  63 %{shared} \
  64   %{!shared: \
  65     %{!static: \
  66       %{rdynamic:-export-dynamic} \
  67       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  68     %{static:-static}}"