unix 下C 语言 include 搜索的路径的设置在什么地方啊

repairsky

unix 下C 语言 include 搜索的路径的设置  在什么地方啊     

summersnow

我也是新手，说的不一定正确，如果不对，不要见笑。
我想着要看你用什末工具，如果用make,则在makefile中用全路径或环境变量路径说明。如果用forte c中的workshop，则在.prd 文件中说明。

albcamus

只知道gcc好多参数可以增设系统的，设定非系统的。

一直想知道如果采用默认，gcc都会查询哪些路径，如何永久添加/删除这些路径。

lenovo

我把gcc设置默认搜索目录的程序放这里，
有兴趣研究一下吧，我也没怎么看。
这是gcc－3.4.3
cppdefault.h

1. 
   
2. /* CPP Library.
   
3.    Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   
4.    1999, 2000, 2003 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 2, 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; if not, write to the Free Software
    
21. Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
    
22. 
    
23. #ifndef GCC_CPPDEFAULT_H
    
24. #define GCC_CPPDEFAULT_H
    
25. 
    
26. /* This is the default list of directories to search for include files.
    
27.    It may be overridden by the various -I and -ixxx options.
    
28. 
    
29.    #include "file" looks in the same directory as the current file,
    
30.    then this list.
    
31.    #include <file>; just looks in this list.
    
32. 
    
33.    All these directories are treated as `system' include directories
    
34.    (they are not subject to pedantic warnings in some cases).  */
    
35. 
    
36. struct default_include
    
37. {
    
38.   const char *const fname;        /* The name of the directory.  */
    
39.   const char *const component;        /* The component containing the directory
    
40.                                    (see update_path in prefix.c) */
    
41.   const char cplusplus;                /* Only look here if we're compiling C++.  */
    
42.   const char cxx_aware;                /* Includes in this directory don't need to
    
43.                                    be wrapped in extern "C" when compiling
    
44.                                    C++.  */
    
45.   const char add_sysroot;        /* FNAME should be prefixed by
    
46.                                    cpp_SYSROOT.  */
    
47. };
    
48. 
    
49. extern const struct default_include cpp_include_defaults[];
    
50. extern const char cpp_GCC_INCLUDE_DIR[];
    
51. extern const size_t cpp_GCC_INCLUDE_DIR_len;
    
52. 
    
53. extern const char *cpp_SYSROOT;
    
54. 
    
55. #endif /* ! GCC_CPPDEFAULT_H */
    

复制代码

cppdefault.c

1. 
   
2. /* CPP Library.
   
3.    Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   
4.    1999, 2000, 2003 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 2, 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; if not, write to the Free Software
    
21. Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
    
22. 
    
23. #include "config.h"
    
24. #include "system.h"
    
25. #include "coretypes.h"
    
26. #include "tm.h"
    
27. #include "cppdefault.h"
    
28. 
    
29. #ifndef STANDARD_INCLUDE_DIR
    
30. #define STANDARD_INCLUDE_DIR "/usr/include"
    
31. #endif
    
32. 
    
33. #ifndef STANDARD_INCLUDE_COMPONENT
    
34. #define STANDARD_INCLUDE_COMPONENT 0
    
35. #endif
    
36. 
    
37. #if defined (CROSS_COMPILE) && !defined (TARGET_SYSTEM_ROOT)
    
38. # undef LOCAL_INCLUDE_DIR
    
39. # undef SYSTEM_INCLUDE_DIR
    
40. # undef STANDARD_INCLUDE_DIR
    
41. #else
    
42. # undef CROSS_INCLUDE_DIR
    
43. #endif
    
44. 
    
45. const struct default_include cpp_include_defaults[]
    
46. #ifdef INCLUDE_DEFAULTS
    
47. = INCLUDE_DEFAULTS;
    
48. #else
    
49. = {
    
50. #ifdef GPLUSPLUS_INCLUDE_DIR
    
51.     /* Pick up GNU C++ generic include files.  */
    
52.     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, 0 },
    
53. #endif
    
54. #ifdef GPLUSPLUS_TOOL_INCLUDE_DIR
    
55.     /* Pick up GNU C++ target-dependent include files.  */
    
56.     { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, 0 },
    
57. #endif
    
58. #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
    
59.     /* Pick up GNU C++ backward and deprecated include files.  */
    
60.     { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, 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 },
    
65. #endif
    
66. #ifdef PREFIX_INCLUDE_DIR
    
67.     { PREFIX_INCLUDE_DIR, 0, 0, 1, 0 },
    
68. #endif
    
69. #ifdef GCC_INCLUDE_DIR
    
70.     /* This is the dir for fixincludes and for gcc's private headers.  */
    
71.     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0 },
    
72. #endif
    
73. #ifdef CROSS_INCLUDE_DIR
    
74.     /* One place the target system's headers might be.  */
    
75.     { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0 },
    
76. #endif
    
77. #ifdef TOOL_INCLUDE_DIR
    
78.     /* Another place the target system's headers might be.  */
    
79.     { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0 },
    
80. #endif
    
81. #ifdef SYSTEM_INCLUDE_DIR
    
82.     /* Some systems have an extra dir of include files.  */
    
83.     { SYSTEM_INCLUDE_DIR, 0, 0, 0, 1 },
    
84. #endif
    
85. #ifdef STANDARD_INCLUDE_DIR
    
86.     /* /usr/include comes dead last.  */
    
87.     { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_COMPONENT, 0, 0, 1 },
    
88. #endif
    
89.     { 0, 0, 0, 0, 0 }
    
90.   };
    
91. #endif /* no INCLUDE_DEFAULTS */
    
92. 
    
93. #ifdef GCC_INCLUDE_DIR
    
94. const char cpp_GCC_INCLUDE_DIR[] = GCC_INCLUDE_DIR;
    
95. const size_t cpp_GCC_INCLUDE_DIR_len = sizeof GCC_INCLUDE_DIR - 8;
    
96. #else
    
97. const char cpp_GCC_INCLUDE_DIR[] = "";
    
98. const size_t cpp_GCC_INCLUDE_DIR_len = 0;
    
99. #endif
    
100. 
     
101. #ifdef TARGET_SYSTEM_ROOT
     
102. const char *cpp_SYSROOT = TARGET_SYSTEM_ROOT;
     
103. #else
     
104. const char *cpp_SYSROOT = "";
     
105. #endif
     

复制代码