/[pcre]/code/trunk/config.in
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revision 43 by nigel, Sat Feb 24 21:39:21 2007 UTC revision 73 by nigel, Sat Feb 24 21:40:30 2007 UTC
# Line 3  Line 3 
3  written in Standard C, but there are a few non-standard things it can cope  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.  with, allowing it to run on SunOS4 and other "close to standard" systems.
5    
6  On a non-Unix system you should just copy this file into config.h and change  On a non-Unix system you should just copy this file into config.h, and set up
7  the definitions of HAVE_STRERROR and HAVE_MEMMOVE to 1. Unfortunately, because  the macros the way you need them. You should normally change the definitions of
8  of the way autoconf works, these cannot be made the defaults. */  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    
14    /* 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    
18    #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 to empty if the keyword does not work. */  #define EXPORT
27    
28    /* Define to empty if the "const" keyword does not work. */
29    
30  #undef const  #undef const
31    
32  /* Define to `unsigned' if <stddef.h> doesn't define size_t. */  /* Define to "unsigned" if <stddef.h> doesn't define size_t. */
33    
34  #undef size_t  #undef size_t
35    
36  /* The following two definitions are mainly for the benefit of SunOS4, which  /* 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  doesn't have the strerror() or memmove() functions that should be present in
38  all Standard C libraries. The macros should normally be defined with the value  all Standard C libraries. The macros HAVE_STRERROR and HAVE_MEMMOVE should
39  1 for other systems, but unfortunately we can't make this the default because  normally be defined with the value 1 for other systems, but unfortunately we
40  "configure" files generated by autoconf will only change 0 to 1; they won't  can't make this the default because "configure" files generated by autoconf
41  change 1 to 0 if the functions are not found. */  will only change 0 to 1; they won't change 1 to 0 if the functions are not
42    found. */
43    
44  #define HAVE_STRERROR 0  #define HAVE_STRERROR 0
45  #define HAVE_MEMMOVE  0  #define HAVE_MEMMOVE  0
46    
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    #define HAVE_BCOPY    0
52    
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    /* 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    /* 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    Makefile (use --disable-recursion). */
104    
105    /* #define NO_RECURSE */
106    
107  /* End */  /* End */

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