gcc/config/vx-common.h

   1 /* Target-independent configuration for VxWorks and VxWorks AE.
   2    Copyright (C) 2005-2022 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_TYPE
  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.
  78
  79    Taking care of this here allows using DWARF2_UNWIND_INFO in #if conditions
  80    from the common config/vxworks.h files, included before the cpu
  81    specializations.  Unlike with conditions used in C expressions, where the
  82    definitions which matter are those at the expression expansion point, use
  83    in #if constructs requires an accurate definition of the operands at the
  84    #if point.  Since <cpu>/vxworks.h. is typically included after
  85    config/vxworks.h, #if expressions in the latter can't rely on possible
  86    redefinitions in the former.  */
  87 #if !ARM_UNWIND_INFO
  88 #undef DWARF2_UNWIND_INFO
  89 #define DWARF2_UNWIND_INFO 1
  90 #endif
  91
  92 /* VxWorks uses DWARF2 debugging info.  */
  93 #define DWARF2_DEBUGGING_INFO 1
  94 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  95
  96 /* None of these other formats is supported.  */
  97 #undef DBX_DEBUGGING_INFO
  98 #undef XCOFF_DEBUGGING_INFO
  99 #undef VMS_DEBUGGING_INFO
 100
 101 /* ------------------------ Misc configuration bits ----------------------  */
 102
 103 #if !TARGET_VXWORKS7
 104 /* VxWorks, prior to version 7, could not have dots in constructor
 105    labels, because it used a mutant variation of collect2 that
 106    generates C code instead of assembly.  Thus each constructor label
 107    had to be a legitimate C symbol.  */
 108 # undef NO_DOLLAR_IN_LABEL
 109 # define NO_DOT_IN_LABEL
 110 #endif
 111
 112 /* Kernel mode doesn't have ctors/dtors, but RTP mode does.  */
 113 #define TARGET_HAVE_CTORS_DTORS false
 114 #define VXWORKS_OVERRIDE_OPTIONS /* empty */
 115
 116 /* No math library needed.  */
 117 #define MATH_LIBRARY ""
 118
 119 /* No profiling.  */
 120 #define VXWORKS_FUNCTION_PROFILER(FILE, LABELNO) do     \
 121 {                                                       \
 122   sorry ("profiler support for VxWorks");               \
 123 } while (0)
 124
 125 /* We occasionally need to distinguish between the VxWorks variants.  */
 126 #define VXWORKS_KIND_NORMAL  1
 127 #define VXWORKS_KIND_AE      2