Make sure MULTIPLICITY builds set PERL_IMPLICIT_CONTEXT

diff --git a/autovivification.xs b/autovivification.xs
index 4f7a212baa2a829bdf3bd7a95b4cb216920bab3d..222b3a7cae06375674841d622273d5091f0e39e1 100644 (file)
--- a/autovivification.xs
+++ b/autovivification.xs
@@ -49,12 +49,17 @@
 #endif
 
 #ifndef A_MULTIPLICITY
-# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
+# if defined(MULTIPLICITY)
 #  define A_MULTIPLICITY 1
 # else
 #  define A_MULTIPLICITY 0
 # endif
 #endif
+#if A_MULTIPLICITY
+# ifndef PERL_IMPLICIT_CONTEXT
+#  error MULTIPLICITY builds must set PERL_IMPLICIT_CONTEXT
+# endif
+#endif
 
 #ifndef tTHX
 # define tTHX PerlInterpreter*