gcc/cppdefault.c

   1 /* CPP Library.
   2    Copyright (C) 1986-2021 Free Software Foundation, Inc.
   3    Contributed by Per Bothner, 1994-95.
   4    Based on CCCP program by Paul Rubin, June 1986
   5    Adapted to ANSI C, Richard Stallman, Jan 1987
   6
   7    This program is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by the
   9    Free Software Foundation; either version 3, or (at your option) any
  10    later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "cppdefault.h"
  26
  27 #ifndef NATIVE_SYSTEM_HEADER_COMPONENT
  28 #define NATIVE_SYSTEM_HEADER_COMPONENT 0
  29 #endif
  30
  31 #if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
  32 # undef LOCAL_INCLUDE_DIR
  33 # undef NATIVE_SYSTEM_HEADER_DIR
  34 #else
  35 # undef CROSS_INCLUDE_DIR
  36 #endif
  37
  38 const struct default_include cpp_include_defaults[]
  39 #ifdef INCLUDE_DEFAULTS
  40 = INCLUDE_DEFAULTS;
  41 #else
  42 = {
  43 #ifdef GPLUSPLUS_INCLUDE_DIR
  44     /* Pick up GNU C++ generic include files.  */
  45     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,
  46       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 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,
  51       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },
  52 #endif
  53 #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
  54     /* Pick up GNU C++ backward and deprecated include files.  */
  55     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,
  56       GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
  57 #endif
  58 #ifdef GPLUSPLUS_LIBCXX_INCLUDE_DIR
  59     /* Pick up libc++ include files, if we have -stdlib=libc++.  */
  60     { GPLUSPLUS_LIBCXX_INCLUDE_DIR, "G++", 2, 1,
  61       GPLUSPLUS_LIBCXX_INCLUDE_DIR_ADD_SYSROOT, 0 },
  62 #endif
  63 #ifdef GCC_INCLUDE_DIR
  64     /* This is the dir for gcc's private headers.  */
  65     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  66 #endif
  67 #ifdef LOCAL_INCLUDE_DIR
  68     /* /usr/local/include comes before the fixincluded header files.  */
  69     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
  70     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
  71 #endif
  72 #ifdef PREFIX_INCLUDE_DIR
  73     { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
  74 #endif
  75 #ifdef FIXED_INCLUDE_DIR
  76     /* This is the dir for fixincludes.  */
  77     { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0,
  78       /* A multilib suffix needs adding if different multilibs use
  79          different headers.  */
  80 #ifdef SYSROOT_HEADERS_SUFFIX_SPEC
  81       1
  82 #else
  83       0
  84 #endif
  85     },
  86 #endif
  87 #ifdef CROSS_INCLUDE_DIR
  88     /* One place the target system's headers might be.  */
  89     { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
  90 #endif
  91 #ifdef TOOL_INCLUDE_DIR
  92     /* Another place the target system's headers might be.  */
  93     { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
  94 #endif
  95 #ifdef NATIVE_SYSTEM_HEADER_DIR
  96     /* /usr/include comes dead last.  */
  97     { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 },
  98     { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 },
  99 #endif
 100     { 0, 0, 0, 0, 0, 0 }
 101   };
 102 #endif /* no INCLUDE_DEFAULTS */
 103
 104 #ifdef GCC_INCLUDE_DIR
 105 const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
 106 const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
 107 #else
 108 const char cpp_GCC_INCLUDE_DIR[] = "";
 109 const size_t cpp_GCC_INCLUDE_DIR_len = 0;
 110 #endif
 111
 112 /* The configured prefix.  */
 113 const char cpp_PREFIX[] = PREFIX;
 114 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
 115 const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
 116
 117 /* This value is set by cpp_relocated at runtime */
 118 const char *gcc_exec_prefix;
 119
 120 /* Return true if the toolchain is relocated.  */
 121 bool
 122 cpp_relocated (void)
 123 {
 124   static int relocated = -1;
 125
 126   /* A relocated toolchain ignores standard include directories.  */
 127   if (relocated == -1)
 128     {
 129       /* Check if the toolchain was relocated?  */
 130       gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
 131       if (gcc_exec_prefix)
 132        relocated = 1;
 133       else
 134        relocated = 0;
 135     }
 136
 137   return relocated;
 138 }