pcre_internal.h includes the relevant definitions that configure would
make.

diff -ur pcre-8.36/pcre_internal.h ./pcre_internal.h
--- pcre-8.36/pcre_internal.h	2014-05-27 19:20:05.000000000 +0100
+++ ./pcre_internal.h	2014-11-11 21:44:03.000000000 +0000
@@ -46,6 +46,33 @@
 #ifndef PCRE_INTERNAL_H
 #define PCRE_INTERNAL_H
 
+#include <config.h>
+
+/* and those that are not in R's configure */
/* and those that are not in R's configure:
   LINK_SIZE is set on the command line */
+#define HAVE_MEMMOVE 1
+#define MATCH_LIMIT 10000000
+#define MATCH_LIMIT_RECURSION MATCH_LIMIT
+#define MAX_NAME_COUNT 10000
+#define MAX_NAME_SIZE 32
+#define NEWLINE 10
+#define PARENS_NEST_LIMIT 250
+#define POSIX_MALLOC_THRESHOLD 10
+#define SUPPORT_UCP
+#define SUPPORT_UTF
+
+/* See http://sourceforge.net/p/predef/wiki/Architectures/
+   SPARC_32 support added in 8.32, 'experimental'.
+
+   At least i386 support did not compile on Solaris Studio.
+ */
+#ifndef __SUNPRO_C
+#if defined(WIN32) || defined(__i386__) || defined(__i386) || defined(__x86_64__) || defined(__ppc64__) || defined(__powerpc64__) || defined(__ppc__) || defined(__powerpc__) || defined(__sparc__)
+# define SUPPORT_JIT
+#endif
+#endif
+
 /* Define PCRE_DEBUG to get debugging output on stdout. */
 
 #if 0