output warning if onig_initialize() is not called explicitly

diff --git a/src/regcomp.c b/src/regcomp.c
index 2fac4126f076babbe7490afe92a5d48bb9115ceb..3cc7a91fe4737b6a1275237d57daffb29ff26e3e 100644 (file)
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -5435,6 +5435,8 @@ onig_reg_init(regex_t* reg, OnigOptionType option,
     r = onig_initialize_encoding(enc);
     if (r != 0)
       return ONIGERR_FAIL_TO_INITIALIZE;
+
+    onig_warning("You didn't call onig_initialize() explicitly");
 #endif
   }