cppdefault.c revision 1.10 
1/* CPP Library.
2   Copyright (C) 1986-2019 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#ifndef GCC_INCLUDE_DIR_ADD_SYSROOT
60#define GCC_INCLUDE_DIR_ADD_SYSROOT 0
61#endif
62    /* This is the dir for gcc's private headers.  */
63    { GCC_INCLUDE_DIR, "GCC", 0, 0,
64      GCC_INCLUDE_DIR_ADD_SYSROOT, 0 },
65#endif
66#ifdef LOCAL_INCLUDE_DIR
67    /* /usr/local/include comes before the fixincluded header files.  */
68    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
69    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
70#endif
71#ifdef PREFIX_INCLUDE_DIR
72    { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 },
73#endif
74#ifdef FIXED_INCLUDE_DIR
75    /* This is the dir for fixincludes.  */
76    { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0,
77      /* A multilib suffix needs adding if different multilibs use
78	 different headers.  */
79#ifdef SYSROOT_HEADERS_SUFFIX_SPEC
80      1
81#else
82      0
83#endif
84    },
85#endif
86#ifdef CROSS_INCLUDE_DIR
87    /* One place the target system's headers might be.  */
88    { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
89#endif
90#ifdef TOOL_INCLUDE_DIR
91    /* Another place the target system's headers might be.  */
92    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 },
93#endif
94#ifdef NATIVE_SYSTEM_HEADER_DIR
95    /* /usr/include comes dead last.  */
96    { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 },
97    { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 },
98#endif
99    { 0, 0, 0, 0, 0, 0 }
100  };
101#endif /* no INCLUDE_DEFAULTS */
102
103#ifdef GCC_INCLUDE_DIR
104const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
105const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
106#else
107const char cpp_GCC_INCLUDE_DIR[] = "";
108const size_t cpp_GCC_INCLUDE_DIR_len = 0;
109#endif
110
111/* The configured prefix.  */
112const char cpp_PREFIX[] = PREFIX;
113const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
114const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
115
116/* This value is set by cpp_relocated at runtime */
117const char *gcc_exec_prefix;
118
119/* Return true if the toolchain is relocated.  */
120bool
121cpp_relocated (void)
122{
123  static int relocated = -1;
124
125  /* A relocated toolchain ignores standard include directories.  */
126  if (relocated == -1)
127    {
128      /* Check if the toolchain was relocated?  */
129      gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
130      if (gcc_exec_prefix)
131       relocated = 1;
132      else
133       relocated = 0;
134    }
135
136  return relocated;
137}
138