#include <pcre.h>

       int pcre_config(int what, void *where);

       int pcre16_config(int what, void *where);


       This  function makes it possible for a client program to find out which
       optional features are available in the version of the PCRE  library  it
       is using. The arguments are as follows:

         what     A code specifying what information is required
         where    Points to where to put the data

       The  where  argument  must  point  to  an  integer variable, except for
       must point to an unsigned long integer. The available codes are:

         PCRE_CONFIG_JIT           Availability of just-in-time compiler
                                     support (1=yes 0=no)
         PCRE_CONFIG_JITTARGET     String containing information about the
                                     target architecture for the JIT compiler,
                                     or NULL if there is no JIT support
         PCRE_CONFIG_LINK_SIZE     Internal link size: 2, 3, or 4
         PCRE_CONFIG_MATCH_LIMIT   Internal resource limit
                                   Internal recursion depth limit
         PCRE_CONFIG_NEWLINE       Value of the default newline sequence:
                                       13 (0x000d)    for CR
                                       10 (0x000a)    for LF
                                     3338 (0x0d0a)    for CRLF
                                       -2             for ANYCRLF
                                       -1             for ANY
         PCRE_CONFIG_BSR           Indicates what \R matches by default:
                                        0             all Unicode line endings
                                        1             CR, LF, or CRLF only
                                   Threshold of return slots, above which
                                     malloc() is used by the POSIX API
         PCRE_CONFIG_STACKRECURSE  Recursion implementation (1=stack 0=heap)
         PCRE_CONFIG_UTF16         Availability of UTF-16 support (1=yes
                                      0=no); option for pcre16_config()
         PCRE_CONFIG_UTF8          Availability of UTF-8 support (1=yes 0=no);
                                     option for pcre_config()
                                   Availability of Unicode property support
                                     (1=yes 0=no)

       The  function  yields  0  on success or PCRE_ERROR_BADOPTION otherwise.
       That error is also given if PCRE_CONFIG_UTF16 is  passed  to  pcre_con-
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