1/* CPP Library.
2   Copyright (C) 1986-2015 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
38const 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 GCC_INCLUDE_DIR
59    /* This is the dir for gcc's private headers.  */
60    { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
61#endif
62#ifdef LOCAL_INCLUDE_DIR
63    /* /usr/local/include comes before the fixincluded header files.  */
64    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
65    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
66#endif
67#ifdef PREFIX_INCLUDE_DIR
68    { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
69#endif
70#ifdef FIXED_INCLUDE_DIR
71    /* This is the dir for fixincludes.  */
72    { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0,
73      /* A multilib suffix needs adding if different multilibs use
74	 different headers.  */
75#ifdef SYSROOT_HEADERS_SUFFIX_SPEC
76      1
77#else
78      0
79#endif
80    },
81#endif
82#ifdef CROSS_INCLUDE_DIR
83    /* One place the target system's headers might be.  */
84    { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
85#endif
86#ifdef TOOL_INCLUDE_DIR
87    /* Another place the target system's headers might be.  */
88    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
89#endif
90#ifdef NATIVE_SYSTEM_HEADER_DIR
91    /* /usr/include comes dead last.  */
92    { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 },
93    { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 },
94#endif
95    { 0, 0, 0, 0, 0, 0 }
96  };
97#endif /* no INCLUDE_DEFAULTS */
98
99#ifdef GCC_INCLUDE_DIR
100const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
101const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
102#else
103const char cpp_GCC_INCLUDE_DIR[] = "";
104const size_t cpp_GCC_INCLUDE_DIR_len = 0;
105#endif
106
107/* The configured prefix.  */
108const char cpp_PREFIX[] = PREFIX;
109const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
110const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
111
112/* This value is set by cpp_relocated at runtime */
113const char *gcc_exec_prefix;
114
115/* Return true if the toolchain is relocated.  */
116bool
117cpp_relocated (void)
118{
119  static int relocated = -1;
120
121  /* A relocated toolchain ignores standard include directories.  */
122  if (relocated == -1)
123    {
124      /* Check if the toolchain was relocated?  */
125      gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
126      if (gcc_exec_prefix)
127       relocated = 1;
128      else
129       relocated = 0;
130    }
131
132  return relocated;
133}
134