Building PCRE on Windows

My environment is Visual Studio 2005 on Windows Vista for PCRE 7.1. Since PCRE is written in ANSI C, just follow instructions in the doc NON-UNIX-USE. Remember to turn off some macros in config.h such as HAVE_UNISTD_H.

Two weird things here:

1. Define macro NO_RECURSE in config.h if necessary; otherwise running test on data "testinput2" would fail with stack overflow. The current GnuWin32 PCRE 7.0 suffers from this problem.

2. Add a call to _set_printf_count_output(1) at the beginning of main in pcregrep.c; by default VC CRT does not support the format "%n" and the program pcregrep.exe using such format would crash.