diff -ur musl-rpmatch-1.0/rpmatch.h musl-rpmatch-1.0+iPhone/rpmatch.h
--- musl-rpmatch-1.0/rpmatch.h	2016-07-07 03:31:00.000000000 -1000
+++ musl-rpmatch-1.0+iPhone/rpmatch.h	2018-08-31 15:41:43.000000000 -1000
@@ -1,6 +1,9 @@
 #if !defined(_RPMATCH_H_)
 #define _RPMATCH_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 /*
  * Determine whether the string value of RESPONSE matches the affirmation
  * or negative response expression as specified by the LC_MESSAGES category
@@ -8,5 +11,8 @@
  * negative, and -1 if not matching.
  */
 extern int rpmatch (const char *response);
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* !defined(_RPMATCH_H_) */