build: avoid link failure in devmsg() on older linkers

On linkers that don't remove unused functions,
there will be a reference to a missing dev_debug symbol
in the devmsg() function.  So for now ...

* src/system.h: ... move devmsg() from here ...
* src/numfmt.c: ... to here, and document future cleanup.
* src/factor.c: Likewise.

1 files changed, 0 insertions, 15 deletions

diff --git a/src/system.h b/src/system.h
index 6c310ad2c..1677999ef 100644
--- a/src/system.h
+++ b/src/system.h
@@ -649,21 +649,6 @@ stzncpy (char *restrict dest, char const *restrict src, size_t len)
   return dest;
 }
 
-/* Like error(0, 0, ...), but without an implicit newline.
-   Also a noop unless the global DEV_DEBUG is set.  */
-extern bool dev_debug;
-static inline void
-devmsg (char const *fmt, ...)
-{
-  if (dev_debug)
-    {
-      va_list ap;
-      va_start (ap, fmt);
-      vfprintf (stderr, fmt, ap);
-      va_end (ap);
-    }
-}
-
 #ifndef ARRAY_CARDINALITY
 # define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
 #endif