+#define PERL_MAGIC_UTF8_CACHESIZE 2
+
+#define PERL_UNICODE_STDIN_FLAG 0x0001
+#define PERL_UNICODE_STDOUT_FLAG 0x0002
+#define PERL_UNICODE_STDERR_FLAG 0x0004
+#define PERL_UNICODE_IN_FLAG 0x0008
+#define PERL_UNICODE_OUT_FLAG 0x0010
+#define PERL_UNICODE_ARGV_FLAG 0x0020
+#define PERL_UNICODE_LOCALE_FLAG 0x0040
+#define PERL_UNICODE_WIDESYSCALLS_FLAG 0x0080 /* for Sarathy */
+
+#define PERL_UNICODE_STD_FLAG \
+ (PERL_UNICODE_STDIN_FLAG | \
+ PERL_UNICODE_STDOUT_FLAG | \
+ PERL_UNICODE_STDERR_FLAG)
+
+#define PERL_UNICODE_INOUT_FLAG \
+ (PERL_UNICODE_IN_FLAG | \
+ PERL_UNICODE_OUT_FLAG)
+
+#define PERL_UNICODE_DEFAULT_FLAGS \
+ (PERL_UNICODE_STD_FLAG | \
+ PERL_UNICODE_INOUT_FLAG | \
+ PERL_UNICODE_LOCALE_FLAG)
+
+#define PERL_UNICODE_ALL_FLAGS 0x00ff
+
+#define PERL_UNICODE_STDIN 'I'
+#define PERL_UNICODE_STDOUT 'O'
+#define PERL_UNICODE_STDERR 'E'
+#define PERL_UNICODE_STD 'S'
+#define PERL_UNICODE_IN 'i'
+#define PERL_UNICODE_OUT 'o'
+#define PERL_UNICODE_INOUT 'D'
+#define PERL_UNICODE_ARGV 'A'
+#define PERL_UNICODE_LOCALE 'L'
+#define PERL_UNICODE_WIDESYSCALLS 'W'
+
+#define PERL_SIGNALS_UNSAFE_FLAG 0x0001
+
+/* From sigaction(2) (FreeBSD man page):
+ * | Signal routines normally execute with the signal that
+ * | caused their invocation blocked, but other signals may
+ * | yet occur.
+ * Emulation of this behavior (from within Perl) is enabled
+ * by defining PERL_BLOCK_SIGNALS.
+ */
+#define PERL_BLOCK_SIGNALS
+
+#if defined(HAS_SIGPROCMASK) && defined(PERL_BLOCK_SIGNALS)
+# define PERL_BLOCKSIG_ADD(set,sig) \
+ sigset_t set; sigemptyset(&(set)); sigaddset(&(set), sig)
+# define PERL_BLOCKSIG_BLOCK(set) \
+ sigprocmask(SIG_BLOCK, &(set), NULL)
+# define PERL_BLOCKSIG_UNBLOCK(set) \
+ sigprocmask(SIG_UNBLOCK, &(set), NULL)
+#endif /* HAS_SIGPROCMASK && PERL_BLOCK_SIGNALS */
+
+/* How about the old style of sigblock()? */
+
+#ifndef PERL_BLOCKSIG_ADD
+# define PERL_BLOCKSIG_ADD(set, sig) NOOP
+#endif
+#ifndef PERL_BLOCKSIG_BLOCK
+# define PERL_BLOCKSIG_BLOCK(set) NOOP
+#endif
+#ifndef PERL_BLOCKSIG_UNBLOCK
+# define PERL_BLOCKSIG_UNBLOCK(set) NOOP
+#endif
+
+/* Use instead of abs() since abs() forces its argument to be an int,
+ * but also beware since this evaluates its argument twice, so no x++. */
+#define PERL_ABS(x) ((x) < 0 ? -(x) : (x))
+