int pcre_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. Its arguments are as follows:
what A code specifying what information is required where Points to where to put the data
The available codes are:
PCRE_CONFIG_LINK_SIZE Internal link size: 2, 3, or 4 PCRE_CONFIG_MATCH_LIMIT Internal resource limit PCRE_CONFIG_NEWLINE Value of the newline character PCRE_CONFIG_POSIX_MALLOC_THRESHOLD Threshold of return slots, above which malloc() is used by the POSIX API PCRE_CONFIG_UTF8 Availability of UTF-8 support
The function yields 0 on success or PCRE_ERROR_BADOPTION otherwise.
There is a complete description of the PCRE native API in the pcreapi page, and a description of the POSIX API in the pcreposix page.