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, 2007, 2010, 2011
   4    Free Software Foundation, Inc.
   5    Contributed by Per Bothner, 1994-95.
   6    Based on CCCP program by Paul Rubin, June 1986
   7    Adapted to ANSI C, Richard Stallman, Jan 1987
   8
   9    This program is free software; you can redistribute it and/or modify it
  10    under the terms of the GNU General Public License as published by the
  11    Free Software Foundation; either version 3, or (at your option) any
  12    later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; see the file COPYING3.  If not see
  21    <http://www.gnu.org/licenses/>.  */
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "cppdefault.h"
  28
  29 #ifndef NATIVE_SYSTEM_HEADER_COMPONENT
  30 #define NATIVE_SYSTEM_HEADER_COMPONENT 0
  31 #endif
  32
  33 #if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
  34 # undef LOCAL_INCLUDE_DIR
  35 #else
  36 # undef CROSS_INCLUDE_DIR
  37 #endif
  38
  39 const struct default_include cpp_include_defaults[]
  40 #ifdef INCLUDE_DEFAULTS
  41 = INCLUDE_DEFAULTS;
  42 #else
  43 = {
  44 #ifdef GPLUSPLUS_INCLUDE_DIR
  45     /* Pick up GNU C++ generic include files.  */
  46     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
  47 #endif
  48 #ifdef GPLUSPLUS_TOOL_INCLUDE_DIR
  49     /* Pick up GNU C++ target-dependent include files.  */
  50     { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, 0, 1 },
  51 #endif
  52 #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
  53     /* Pick up GNU C++ backward and deprecated include files.  */
  54     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
  55 #endif
  56 #ifdef GCC_INCLUDE_DIR
  57     /* This is the dir for gcc's private headers.  */
  58     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  59 #endif
  60 #ifdef LOCAL_INCLUDE_DIR
  61     /* /usr/local/include comes before the fixincluded header files.  */
  62     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
  63 #endif
  64 #ifdef PREFIX_INCLUDE_DIR
  65     { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
  66 #endif
  67 #ifdef FIXED_INCLUDE_DIR
  68     /* This is the dir for fixincludes.  */
  69     { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0,
  70       /* A multilib suffix needs adding if different multilibs use
  71          different headers.  */
  72 #ifdef SYSROOT_HEADERS_SUFFIX_SPEC
  73       1
  74 #else
  75       0
  76 #endif
  77     },
  78 #endif
  79 #ifdef CROSS_INCLUDE_DIR
  80     /* One place the target system's headers might be.  */
  81     { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  82 #endif
  83 #ifdef TOOL_INCLUDE_DIR
  84     /* Another place the target system's headers might be.  */
  85     { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
  86 #endif
  87     /* /usr/include comes dead last.  */
  88     { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 },
  89     { 0, 0, 0, 0, 0, 0 }
  90   };
  91 #endif /* no INCLUDE_DEFAULTS */
  92
  93 #ifdef GCC_INCLUDE_DIR
  94 const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
  95 const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
  96 #else
  97 const char cpp_GCC_INCLUDE_DIR[] = "";
  98 const size_t cpp_GCC_INCLUDE_DIR_len = 0;
  99 #endif
 100
 101 /* The configured prefix.  */
 102 const char cpp_PREFIX[] = PREFIX;
 103 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
 104 const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
 105
 106 /* This value is set by cpp_relocated at runtime */
 107 const char *gcc_exec_prefix;
 108
 109 /* Return true if the toolchain is relocated.  */
 110 bool
 111 cpp_relocated (void)
 112 {
 113   static int relocated = -1;
 114
 115   /* A relocated toolchain ignores standard include directories.  */
 116   if (relocated == -1)
 117     {
 118       /* Check if the toolchain was relocated?  */
 119       gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
 120       if (gcc_exec_prefix)
 121        relocated = 1;
 122       else
 123        relocated = 0;
 124     }
 125
 126   return relocated;
 127 }