available for use in that function, and which are documented. That source
should first #define LOCAL_SCAN
+Not every definition that becomes available to the compiler by the inclusion
+of this file is part of the local_scan API. The "Adding a local scan function
+to Exim" chapter in the documentation is definitive.
+
This API is also used for functions called by the ${dlfunc expansion item.
Source for those should first #define DLFUNC_IMPL and then include this file.
Coders of dlfunc routines should read the notes on tainting at the start of
#define Ustrtoul(s,t,b) strtoul(CCS(s),CSS(t),b)
#define Uunlink(s) unlink(CCS(s))
-#ifdef EM_VERSION_C
+#if defined(EM_VERSION_C) || defined(LOCAL_SCAN) || defined(DLFUNC_IMPL)
# define Ustrcat(s,t) strcat(CS(s), CCS(t))
# define Ustrcpy(s,t) strcpy(CS(s), CCS(t))
# define Ustrncat(s,t,n) strncat(CS(s), CCS(t), n)