1  /* Target-independent configuration for VxWorks and VxWorks AE.   
       2     Copyright (C) 2005-2023 Free Software Foundation, Inc.
       3     Contributed by CodeSourcery, LLC.
       4  
       5  This file is part of GCC.
       6  
       7  GCC is free software; you can redistribute it and/or modify it under
       8  the terms of the GNU General Public License as published by the Free
       9  Software Foundation; either version 3, or (at your option) any later
      10  version.
      11  
      12  GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13  WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15  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  /* ------------------------- Common SPEC strings -------------------------  */
      22  
      23  /* Most of these will probably be overridden by subsequent headers.  We
      24     undefine them here just in case, and define VXWORKS_ versions of each,
      25     to be used in port-specific vxworks.h.  */
      26  
      27  /* REAL_LIBGCC_SPEC needs to be used since the non-static option is not
      28     handled in gcc.cc.  */
      29  #undef REAL_LIBGCC_SPEC
      30  #define REAL_LIBGCC_SPEC VXWORKS_LIBGCC_SPEC
      31  #undef STARTFILE_SPEC
      32  #undef ENDFILE_SPEC
      33  
      34  /* Most of these macros are overridden in "config/vxworks.h" or
      35     "config/vxworksae.h" and are here merely for documentation
      36     purposes.  */
      37  #define VXWORKS_ADDITIONAL_CPP_SPEC ""
      38  #define	VXWORKS_LIB_SPEC ""
      39  #define VXWORKS_LINK_SPEC ""
      40  #define VXWORKS_LIBGCC_SPEC ""
      41  #define	VXWORKS_STARTFILE_SPEC ""
      42  #define VXWORKS_ENDFILE_SPEC ""
      43  #define VXWORKS_CC1_SPEC ""
      44  
      45  /* ----------------------- Common type descriptions -----------------------  */
      46  
      47  /* Regardless of the target architecture, VxWorks uses a signed 32bit
      48     integer for wchar_t starting with vx7 SR06xx.  An unsigned short
      49     otherwise.  */
      50  #if TARGET_VXWORKS7
      51  
      52  #undef WCHAR_TYPE_SIZE
      53  #define WCHAR_TYPE_SIZE 32
      54  #undef WCHAR_TYPE
      55  #define WCHAR_TYPE (TARGET_VXWORKS64 ? "int" : "long int")
      56  
      57  #else
      58  
      59  #undef WCHAR_TYPE_SIZE
      60  #define WCHAR_TYPE_SIZE 16
      61  #undef WCHAR_TYPE
      62  #define WCHAR_TYPE "short unsigned int"
      63  
      64  #endif
      65  
      66  /* The VxWorks headers base wint_t on the definitions used for wchar_t.
      67     Do the same here to make sure they remain in sync, in case WCHAR_TYPE
      68     gets redefined for a specific CPU architecture.  */
      69  #undef WINT_TYPE_SIZE
      70  #define WINT_TYPE_SIZE WCHAR_TYPE_SIZE
      71  #undef WINT_TYPE
      72  #define WINT_TYPE "wchar_t"
      73  
      74  /* ---------------------- Debug and unwind info formats ------------------  */
      75  
      76  /* Dwarf2 unwind info is supported, unless overriden by a request for a target
      77     specific format.  Always #define DWARF2_UNWIND_INFO to prevent defaults.h
      78     from picking a possibly different value.
      79  
      80     Taking care of this here allows using DWARF2_UNWIND_INFO in #if conditions
      81     from the common config/vxworks.h files, included before the cpu
      82     specializations.  Unlike with conditions used in C expressions, where the
      83     definitions which matter are those at the expression expansion point, use
      84     in #if constructs requires an accurate definition of the operands at the
      85     #if point.  Since <cpu>/vxworks.h. is typically included after
      86     config/vxworks.h, #if expressions in the latter can't rely on possible
      87     redefinitions in the former.  */
      88  #undef DWARF2_UNWIND_INFO
      89  #if ARM_UNWIND_INFO
      90  #define DWARF2_UNWIND_INFO 0
      91  #else
      92  #define DWARF2_UNWIND_INFO 1
      93  #endif
      94  
      95  /* VxWorks uses DWARF2 debugging info.  */
      96  #define DWARF2_DEBUGGING_INFO 1
      97  #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
      98  
      99  /* None of these other formats is supported.  */
     100  #undef VMS_DEBUGGING_INFO
     101  
     102  /* ------------------------ Misc configuration bits ----------------------  */
     103  
     104  #if !TARGET_VXWORKS7
     105  /* VxWorks, prior to version 7, could not have dots in constructor
     106     labels, because it used a mutant variation of collect2 that
     107     generates C code instead of assembly.  Thus each constructor label
     108     had to be a legitimate C symbol.  */
     109  # undef NO_DOLLAR_IN_LABEL
     110  # define NO_DOT_IN_LABEL
     111  #endif
     112  
     113  /* Kernel mode doesn't have ctors/dtors, but RTP mode does.  */
     114  #define TARGET_HAVE_CTORS_DTORS false
     115  #define VXWORKS_OVERRIDE_OPTIONS /* empty */
     116  
     117  /* No math library needed.  */
     118  #define MATH_LIBRARY ""
     119  
     120  /* No profiling.  */
     121  #define VXWORKS_FUNCTION_PROFILER(FILE, LABELNO) do	\
     122  {							\
     123    sorry ("profiler support for VxWorks");		\
     124  } while (0)
     125  
     126  /* We occasionally need to distinguish between the VxWorks variants.  */
     127  #define VXWORKS_KIND_NORMAL  1
     128  #define VXWORKS_KIND_AE      2