/[pcre]/code/tags/pcre-6.2/config.in
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Contents of /code/tags/pcre-6.2/config.in

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Revision 82 - (hide annotations) (download)
Sat Feb 24 21:41:01 2007 UTC (7 years, 6 months ago) by nigel
File size: 4522 byte(s)
Tag code/trunk as code/tags/pcre-6.2.

1 nigel 41
2 nigel 43 /* On Unix systems config.in is converted by configure into config.h. PCRE is
3     written in Standard C, but there are a few non-standard things it can cope
4     with, allowing it to run on SunOS4 and other "close to standard" systems.
5 nigel 41
6 nigel 53 On a non-Unix system you should just copy this file into config.h, and set up
7     the macros the way you need them. You should normally change the definitions of
8     HAVE_STRERROR and HAVE_MEMMOVE to 1. Unfortunately, because of the way autoconf
9     works, these cannot be made the defaults. If your system has bcopy() and not
10     memmove(), change the definition of HAVE_BCOPY instead of HAVE_MEMMOVE. If your
11     system has neither bcopy() nor memmove(), leave them both as 0; an emulation
12     function will be used. */
13 nigel 43
14 nigel 73 /* If you are compiling for a system that uses EBCDIC instead of ASCII
15     character codes, define this macro as 1. On systems that can use "configure",
16     this can be done via --enable-ebcdic. */
17 nigel 43
18 nigel 73 #ifndef EBCDIC
19     #define EBCDIC 0
20     #endif
21    
22     /* If you are compiling for a system that needs some magic to be inserted
23     before the definition of an exported function, define this macro to contain the
24     relevant magic. It apears at the start of every exported function. */
25    
26     #define EXPORT
27    
28     /* Define to empty if the "const" keyword does not work. */
29    
30 nigel 41 #undef const
31    
32 nigel 73 /* Define to "unsigned" if <stddef.h> doesn't define size_t. */
33 nigel 43
34 nigel 41 #undef size_t
35    
36 nigel 43 /* The following two definitions are mainly for the benefit of SunOS4, which
37     doesn't have the strerror() or memmove() functions that should be present in
38 nigel 47 all Standard C libraries. The macros HAVE_STRERROR and HAVE_MEMMOVE should
39     normally be defined with the value 1 for other systems, but unfortunately we
40     can't make this the default because "configure" files generated by autoconf
41     will only change 0 to 1; they won't change 1 to 0 if the functions are not
42 nigel 53 found. */
43 nigel 41
44 nigel 43 #define HAVE_STRERROR 0
45     #define HAVE_MEMMOVE 0
46 nigel 53
47     /* There are some non-Unix systems that don't even have bcopy(). If this macro
48     is false, an emulation is used. If HAVE_MEMMOVE is set to 1, the value of
49     HAVE_BCOPY is not relevant. */
50    
51 nigel 47 #define HAVE_BCOPY 0
52 nigel 41
53 nigel 53 /* The value of NEWLINE determines the newline character. The default is to
54     leave it up to the compiler, but some sites want to force a particular value.
55     On Unix systems, "configure" can be used to override this default. */
56    
57     #ifndef NEWLINE
58     #define NEWLINE '\n'
59     #endif
60    
61 nigel 63 /* The value of LINK_SIZE determines the number of bytes used to store
62     links as offsets within the compiled regex. The default is 2, which allows for
63     compiled patterns up to 64K long. This covers the vast majority of cases.
64     However, PCRE can also be compiled to use 3 or 4 bytes instead. This allows for
65     longer patterns in extreme cases. On Unix systems, "configure" can be used to
66     override this default. */
67    
68     #ifndef LINK_SIZE
69     #define LINK_SIZE 2
70     #endif
71    
72     /* The value of MATCH_LIMIT determines the default number of times the match()
73     function can be called during a single execution of pcre_exec(). (There is a
74     runtime method of setting a different limit.) The limit exists in order to
75     catch runaway regular expressions that take for ever to determine that they do
76     not match. The default is set very large so that it does not accidentally catch
77     legitimate cases. On Unix systems, "configure" can be used to override this
78     default default. */
79    
80     #ifndef MATCH_LIMIT
81     #define MATCH_LIMIT 10000000
82     #endif
83    
84 nigel 73 /* When calling PCRE via the POSIX interface, additional working storage is
85     required for holding the pointers to capturing substrings because PCRE requires
86     three integers per substring, whereas the POSIX interface provides only two. If
87     the number of expected substrings is small, the wrapper function uses space on
88     the stack, because this is faster than using malloc() for each call. The
89     threshold above which the stack is no longer use is defined by POSIX_MALLOC_
90     THRESHOLD. On Unix systems, "configure" can be used to override this default.
91     */
92    
93     #ifndef POSIX_MALLOC_THRESHOLD
94     #define POSIX_MALLOC_THRESHOLD 10
95     #endif
96    
97     /* PCRE uses recursive function calls to handle backtracking while matching.
98     This can sometimes be a problem on systems that have stacks of limited size.
99     Define NO_RECURSE to get a version that doesn't use recursion in the match()
100     function; instead it creates its own stack by steam using pcre_recurse_malloc
101     to get memory. For more detail, see comments and other stuff just above the
102     match() function. On Unix systems, "configure" can be used to set this in the
103 nigel 75 Makefile (use --disable-stack-for-recursion). */
104 nigel 73
105     /* #define NO_RECURSE */
106    
107 nigel 41 /* End */

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