gcc/config/vx-common.h

   1 /* Target-independent configuration for VxWorks and VxWorks AE.
   2    Copyright (C) 2005-2021 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 #undef LIBGCC_SPEC
  27 #define LIBGCC_SPEC VXWORKS_LIBGCC_SPEC
  28 #undef STARTFILE_SPEC
  29 #undef ENDFILE_SPEC
  30
  31 /* Most of these macros are overridden in "config/vxworks.h" or
  32    "config/vxworksae.h" and are here merely for documentation
  33    purposes.  */
  34 #define VXWORKS_ADDITIONAL_CPP_SPEC ""
  35 #define VXWORKS_LIB_SPEC ""
  36 #define VXWORKS_LINK_SPEC ""
  37 #define VXWORKS_LIBGCC_SPEC ""
  38 #define VXWORKS_STARTFILE_SPEC ""
  39 #define VXWORKS_ENDFILE_SPEC ""
  40 #define VXWORKS_CC1_SPEC ""
  41
  42 /* ----------------------- Common type descriptions -----------------------  */
  43
  44 /* Regardless of the target architecture, VxWorks uses a signed 32bit
  45    integer for wchar_t starting with vx7 SR06xx.  An unsigned short
  46    otherwise.  */
  47 #if TARGET_VXWORKS7
  48
  49 #undef WCHAR_TYPE_SIZE
  50 #define WCHAR_TYPE_SIZE 32
  51 #undef WCHAR_TYPE
  52 #define WCHAR_TYPE (TARGET_VXWORKS64 ? "int" : "long int")
  53
  54 #else
  55
  56 #undef WCHAR_TYPE_SIZE
  57 #define WCHAR_TYPE_SIZE 16
  58 #undef WCHAR_TYPE
  59 #define WCHAR_TYPE "short unsigned int"
  60
  61 #endif
  62
  63 /* The VxWorks headers base wint_t on the definitions used for wchar_t.
  64    Do the same here to make sure they remain in sync, in case WCHAR_TYPE
  65    gets redefined for a specific CPU architecture.  */
  66 #undef WINT_TYPE_SIZE
  67 #define WINT_TYPE_SIZE WCHAR_TYPE_SIZE
  68 #undef WINT_TYPE
  69 #define WINT_TYPE WCHAR_TYPE
  70
  71 /* ---------------------- Debug and unwind info formats ------------------  */
  72
  73 /* Dwarf2 unwind info is supported, unless overriden by a request for a target
  74    specific format.
  75
  76    Taking care of this here allows using DWARF2_UNWIND_INFO in #if conditions
  77    from the common config/vxworks.h files, included before the cpu
  78    specializations.  Unlike with conditions used in C expressions, where the
  79    definitions which matter are those at the expression expansion point, use
  80    in #if constructs requires an accurate definition of the operands at the
  81    #if point.  Since <cpu>/vxworks.h. is typically included after
  82    config/vxworks.h, #if expressions in the latter can't rely on possible
  83    redefinitions in the former.  */
  84 #if !ARM_UNWIND_INFO
  85 #undef DWARF2_UNWIND_INFO
  86 #define DWARF2_UNWIND_INFO 1
  87 #endif
  88
  89 /* VxWorks uses DWARF2 debugging info.  */
  90 #define DWARF2_DEBUGGING_INFO 1
  91 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  92
  93 /* None of these other formats is supported.  */
  94 #undef DBX_DEBUGGING_INFO
  95 #undef XCOFF_DEBUGGING_INFO
  96 #undef VMS_DEBUGGING_INFO
  97
  98 /* ------------------------ Misc configuration bits ----------------------  */
  99
 100 #if !TARGET_VXWORKS7
 101 /* VxWorks, prior to version 7, could not have dots in constructor
 102    labels, because it used a mutant variation of collect2 that
 103    generates C code instead of assembly.  Thus each constructor label
 104    had to be a legitimate C symbol.  */
 105 # undef NO_DOLLAR_IN_LABEL
 106 # define NO_DOT_IN_LABEL
 107 #endif
 108
 109 /* Kernel mode doesn't have ctors/dtors, but RTP mode does.  */
 110 #define TARGET_HAVE_CTORS_DTORS false
 111 #define VXWORKS_OVERRIDE_OPTIONS /* empty */
 112
 113 /* No math library needed.  */
 114 #define MATH_LIBRARY ""
 115
 116 /* No profiling.  */
 117 #define VXWORKS_FUNCTION_PROFILER(FILE, LABELNO) do     \
 118 {                                                       \
 119   sorry ("profiler support for VxWorks");               \
 120 } while (0)
 121
 122 /* We occasionally need to distinguish between the VxWorks variants.  */
 123 #define VXWORKS_KIND_NORMAL  1
 124 #define VXWORKS_KIND_AE      2