gcc/cppdefault.c

   1 /* CPP Library.
   2    Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2003, 2004, 2006 Free Software Foundation, Inc.
   4    Contributed by Per Bothner, 1994-95.
   5    Based on CCCP program by Paul Rubin, June 1986
   6    Adapted to ANSI C, Richard Stallman, Jan 1987
   7
   8 This program is free software; you can redistribute it and/or modify it
   9 under the terms of the GNU General Public License as published by the
  10 Free Software Foundation; either version 2, or (at your option) any
  11 later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "cppdefault.h"
  27
  28 #ifndef STANDARD_INCLUDE_DIR
  29 #define STANDARD_INCLUDE_DIR "/usr/include"
  30 #endif
  31
  32 #ifndef STANDARD_INCLUDE_COMPONENT
  33 #define STANDARD_INCLUDE_COMPONENT 0
  34 #endif
  35
  36 #if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
  37 # undef LOCAL_INCLUDE_DIR
  38 # undef SYSTEM_INCLUDE_DIR
  39 # undef STANDARD_INCLUDE_DIR
  40 #else
  41 # undef CROSS_INCLUDE_DIR
  42 #endif
  43
  44 const struct default_include cpp_include_defaults[]
  45 #ifdef INCLUDE_DEFAULTS
  46 = INCLUDE_DEFAULTS;
  47 #else
  48 = {
  49 #ifdef GPLUSPLUS_INCLUDE_DIR
  50     /* Pick up GNU C++ generic include files.  */
  51     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
  52 #endif
  53 #ifdef GPLUSPLUS_TOOL_INCLUDE_DIR
  54     /* Pick up GNU C++ target-dependent include files.  */
  55     { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, 0, 1 },
  56 #endif
  57 #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
  58     /* Pick up GNU C++ backward and deprecated include files.  */
  59     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
  60 #endif
  61 #ifdef LOCAL_INCLUDE_DIR
  62     /* /usr/local/include comes before the fixincluded header files.  */
  63     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
  64 #endif
  65 #ifdef PREFIX_INCLUDE_DIR
  66     { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
  67 #endif
  68 #ifdef GCC_INCLUDE_DIR
  69     /* This is the dir for fixincludes and for gcc's private headers.  */
  70     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  71 #endif
  72 #ifdef CROSS_INCLUDE_DIR
  73     /* One place the target system's headers might be.  */
  74     { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  75 #endif
  76 #ifdef TOOL_INCLUDE_DIR
  77     /* Another place the target system's headers might be.  */
  78     { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
  79 #endif
  80 #ifdef SYSTEM_INCLUDE_DIR
  81     /* Some systems have an extra dir of include files.  */
  82     { SYSTEM_INCLUDE_DIR, 0, 0, 0, 1, 0 },
  83 #endif
  84 #ifdef STANDARD_INCLUDE_DIR
  85     /* /usr/include comes dead last.  */
  86     { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_COMPONENT, 0, 0, 1, 0 },
  87 #endif
  88     { 0, 0, 0, 0, 0, 0 }
  89   };
  90 #endif /* no INCLUDE_DEFAULTS */
  91
  92 #ifdef GCC_INCLUDE_DIR
  93 const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
  94 const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
  95 #else
  96 const char cpp_GCC_INCLUDE_DIR[] = "";
  97 const size_t cpp_GCC_INCLUDE_DIR_len = 0;
  98 #endif
  99
 100 /* The configured prefix.  */
 101 const char cpp_PREFIX[] = PREFIX;
 102 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
 103
 104 /* This value is set by cpp_relocated at runtime */
 105 const char *gcc_exec_prefix;
 106
 107 /* Return true if the toolchain is relocated.  */
 108 bool
 109 cpp_relocated (void)
 110 {
 111   static int relocated = -1;
 112
 113   /* A relocated toolchain ignores standard include directories.  */
 114   if (relocated == -1)
 115     {
 116       /* Check if the toolchain was relocated?  */
 117       GET_ENVIRONMENT (gcc_exec_prefix, "GCC_EXEC_PREFIX");
 118       if (gcc_exec_prefix)
 119        relocated = 1;
 120       else
 121        relocated = 0;
 122     }
 123
 124   return relocated;
 125 }
 126