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 # undef NATIVE_SYSTEM_HEADER_DIR
  36 #else
  37 # undef CROSS_INCLUDE_DIR
  38 #endif
  39
  40 const struct default_include cpp_include_defaults[]
  41 #ifdef INCLUDE_DEFAULTS
  42 = INCLUDE_DEFAULTS;
  43 #else
  44 = {
  45 #ifdef GPLUSPLUS_INCLUDE_DIR
  46     /* Pick up GNU C++ generic include files.  */
  47     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,
  48       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
  49 #endif
  50 #ifdef GPLUSPLUS_TOOL_INCLUDE_DIR
  51     /* Pick up GNU C++ target-dependent include files.  */
  52     { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,
  53       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },
  54 #endif
  55 #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
  56     /* Pick up GNU C++ backward and deprecated include files.  */
  57     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,
  58       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
  59 #endif
  60 #ifdef GCC_INCLUDE_DIR
  61     /* This is the dir for gcc's private headers.  */
  62     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  63 #endif
  64 #ifdef LOCAL_INCLUDE_DIR
  65     /* /usr/local/include comes before the fixincluded header files.  */
  66     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
  67     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
  68 #endif
  69 #ifdef PREFIX_INCLUDE_DIR
  70     { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
  71 #endif
  72 #ifdef FIXED_INCLUDE_DIR
  73     /* This is the dir for fixincludes.  */
  74     { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0,
  75       /* A multilib suffix needs adding if different multilibs use
  76          different headers.  */
  77 #ifdef SYSROOT_HEADERS_SUFFIX_SPEC
  78       1
  79 #else
  80       0
  81 #endif
  82     },
  83 #endif
  84 #ifdef CROSS_INCLUDE_DIR
  85     /* One place the target system's headers might be.  */
  86     { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  87 #endif
  88 #ifdef TOOL_INCLUDE_DIR
  89     /* Another place the target system's headers might be.  */
  90     { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
  91 #endif
  92 #ifdef NATIVE_SYSTEM_HEADER_DIR
  93     /* /usr/include comes dead last.  */
  94     { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 },
  95     { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 },
  96 #endif
  97     { 0, 0, 0, 0, 0, 0 }
  98   };
  99 #endif /* no INCLUDE_DEFAULTS */
 100
 101 #ifdef GCC_INCLUDE_DIR
 102 const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
 103 const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
 104 #else
 105 const char cpp_GCC_INCLUDE_DIR[] = "";
 106 const size_t cpp_GCC_INCLUDE_DIR_len = 0;
 107 #endif
 108
 109 /* The configured prefix.  */
 110 const char cpp_PREFIX[] = PREFIX;
 111 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
 112 const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
 113
 114 /* This value is set by cpp_relocated at runtime */
 115 const char *gcc_exec_prefix;
 116
 117 /* Return true if the toolchain is relocated.  */
 118 bool
 119 cpp_relocated (void)
 120 {
 121   static int relocated = -1;
 122
 123   /* A relocated toolchain ignores standard include directories.  */
 124   if (relocated == -1)
 125     {
 126       /* Check if the toolchain was relocated?  */
 127       gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
 128       if (gcc_exec_prefix)
 129        relocated = 1;
 130       else
 131        relocated = 0;
 132     }
 133
 134   return relocated;
 135 }