1 files changed, 12 insertions, 1 deletions
diff --git a/regexec.c b/regexec.c
index 314fc3dc6a..c1cd8db2b3 100644
--- a/regexec.c
+++ b/regexec.c
@@ -19,7 +19,18 @@
  * with the POSIX routines of the same names.
 */
 
-#ifdef IN_XSUB_RE
+#ifdef PERL_EXT_RE_BUILD
+/* need to replace pregcomp et al, so enable that */
+#  ifndef PERL_IN_XSUB_RE
+#    define PERL_IN_XSUB_RE
+#  endif
+/* need access to debugger hooks */
+#  ifndef DEBUGGING
+#    define DEBUGGING
+#  endif
+#endif
+
+#ifdef PERL_IN_XSUB_RE
 /* We *really* need to overwrite these symbols: */
 #  define Perl_regexec_flags my_regexec
 #  define Perl_regdump my_regdump