+2021-01-26 Keith Marshall <keith@users.osdn.me>
+
+ Avoid proliferation of static snprintf() implementations.
+
+ * mingwex/dlfcn.c (dlfcn_store_error_message): Do NOT use...
+ (vsnprintf): ...this static inline function; prefer to call...
+ (__mingw_vsnprintf): ...this extern implementation, directly.
+
+ * mingwex/dlfcn.c (dlfcn_strerror)
+ * mingwex/setenv.c (__mingw_setenv)
+ * mingwex/strerror_r.c (strerror_r): Do NOT use...
+ (snprintf): ...this; it expands to create static clones of...
+ (__mingw_snprintf): ...this extern implementation; prefer to call it
+ directly, to avoid code redundancy.
+