1  /* Definitions for ARM running ucLinux using ELF
       2     Copyright (C) 1999-2023 Free Software Foundation, Inc.
       3     Contributed by Philip Blundell <pb@nexus.co.uk>
       4  
       5     This file is part of GCC.
       6  
       7     GCC is free software; you can redistribute it and/or modify it
       8     under the terms of the GNU General Public License as published
       9     by the Free Software Foundation; either version 3, or (at your
      10     option) any later version.
      11  
      12     GCC is distributed in the hope that it will be useful, but WITHOUT
      13     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      14     or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
      15     License for more details.
      16  
      17     Under Section 7 of GPL version 3, you are granted additional
      18     permissions described in the GCC Runtime Library Exception, version
      19     3.1, as published by the Free Software Foundation.
      20  
      21     You should have received a copy of the GNU General Public License and
      22     a copy of the GCC Runtime Library Exception along with this program;
      23     see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24     <http://www.gnu.org/licenses/>.  */
      25  
      26  /* We don't want a PLT.  */
      27  #undef  NEED_PLT_RELOC
      28  #define NEED_PLT_RELOC 0
      29  
      30  #undef  TARGET_DEFAULT
      31  #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE)
      32  
      33  /* NOTE: The remaining definitions in this file are needed because uclinux
      34     does not use config/linux.h.  */
      35  
      36  /* Add GNU/Linux builtins.  */
      37  #undef TARGET_OS_CPP_BUILTINS
      38  #define TARGET_OS_CPP_BUILTINS() 		\
      39    do 						\
      40      {						\
      41        builtin_define ("__uClinux__");		\
      42        builtin_define ("__gnu_linux__");         \
      43        builtin_define_std ("linux");             \
      44        builtin_define_std ("unix");              \
      45        builtin_assert ("system=linux");          \
      46        builtin_assert ("system=unix");           \
      47        builtin_assert ("system=posix");          \
      48      }						\
      49    while (false)
      50  
      51  /* The GNU C++ standard library requires that these macros be defined.  */
      52  #undef CPLUSPLUS_CPP_SPEC
      53  #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
      54  
      55  #undef SUBTARGET_EXTRA_LINK_SPEC
      56  #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux"
      57  
      58  /* Now we define the strings used to build the spec file.  */
      59  #undef  STARTFILE_SPEC
      60  #define STARTFILE_SPEC	"crt1%O%s crti%O%s crtbegin%O%s"
      61  
      62  #undef  ENDFILE_SPEC
      63  #define ENDFILE_SPEC	"crtend%O%s crtn%O%s"
      64  
      65  #undef  CC1_SPEC
      66  #define CC1_SPEC "%{profile:-p}"
      67  
      68  #undef LINK_GCC_C_SEQUENCE_SPEC
      69  #define LINK_GCC_C_SEQUENCE_SPEC \
      70    "%{static|static-pie:--start-group} %G %{!nolibc:%L} \
      71     %{static|static-pie:--end-group}%{!static:%{!static-pie:%G %{!nolibc:%L}}}"
      72  
      73  /* Use --as-needed -lgcc_s for eh support.  */
      74  #ifdef HAVE_LD_AS_NEEDED
      75  #define USE_LD_AS_NEEDED 1
      76  #endif
      77  
      78  #undef LINK_SPEC
      79  #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X -elf2flt"
      80  
      81  #undef  LIB_SPEC
      82  #define LIB_SPEC \
      83    "%{pthread:-lpthread} \
      84     %{shared:-lc} \
      85     %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
      86  
      87  #define TARGET_DEFAULT_WORD_RELOCATIONS 1