re PR c++/79790 ([C++17] ICE class template argument deduction failed)
[official-gcc.git] / gcc / cppdefault.c
blob10b96eca0a7162677f479e2c0dba5b44b760bc04
1 /* CPP Library.
2 Copyright (C) 1986-2017 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
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.
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.
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/>. */
21 #include "config.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "tm.h"
25 #include "cppdefault.h"
27 #ifndef NATIVE_SYSTEM_HEADER_COMPONENT
28 #define NATIVE_SYSTEM_HEADER_COMPONENT 0
29 #endif
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
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 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
77 #else
79 #endif
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 }
97 #endif /* no INCLUDE_DEFAULTS */
99 #ifdef GCC_INCLUDE_DIR
100 const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
101 const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
102 #else
103 const char cpp_GCC_INCLUDE_DIR[] = "";
104 const size_t cpp_GCC_INCLUDE_DIR_len = 0;
105 #endif
107 /* The configured prefix. */
108 const char cpp_PREFIX[] = PREFIX;
109 const size_t cpp_PREFIX_len = sizeof PREFIX - 1;
110 const char cpp_EXEC_PREFIX[] = STANDARD_EXEC_PREFIX;
112 /* This value is set by cpp_relocated at runtime */
113 const char *gcc_exec_prefix;
115 /* Return true if the toolchain is relocated. */
116 bool
117 cpp_relocated (void)
119 static int relocated = -1;
121 /* A relocated toolchain ignores standard include directories. */
122 if (relocated == -1)
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;
132 return relocated;