(alloca): Do not undef.

(allocaobj, alloca.o): Remove.
(otherobj): Remove allocaobj.

src/Makefile.in

@@ -75,12 +75,6 @@ SHELL=/bin/sh
 #define NOT_C_CODE
 #include "config.h"
 
-/* We will not really call alloca;
-   do not let the file name alloca.c get messed up.  */
-#ifdef alloca
-#undef alloca
-#endif
-
 /* Do not let the file name mktime.c get messed up.  */
 #ifdef mktime
 #undef mktime
@@ -650,12 +644,6 @@ mallocobj = $(gmallocobj) $(rallocobj) vm-limit.o
 #endif /* SYSTEM_MALLOC */
 
 
-#ifndef HAVE_ALLOCA
-allocaobj = alloca.o
-#else
-allocaobj =
-#endif
-
 #ifdef USE_X_TOOLKIT
 widgetobj= widget.o
 #else /* not USE_X_TOOLKIT */
@@ -667,9 +655,9 @@ widgetobj=
    should not be told about.  */
 #ifdef CYGWIN
 /* Cygwin differs because of its unexec(). */
-otherobj= $(termcapobj) $(gmallocobj) $(rallocobj) lastfile.o vm-limit.o $(allocaobj) $(widgetobj) $(LIBOBJS)
+otherobj= $(termcapobj) $(gmallocobj) $(rallocobj) lastfile.o vm-limit.o $(widgetobj) $(LIBOBJS)
 #else
-otherobj= $(termcapobj) lastfile.o $(mallocobj) $(allocaobj) $(widgetobj) $(LIBOBJS)
+otherobj= $(termcapobj) lastfile.o $(mallocobj) $(widgetobj) $(LIBOBJS)
 #endif
 
 #ifdef HAVE_MOUSE
@@ -1098,12 +1086,6 @@ stamp-oldxmenu:
 	@echo "Please run the `configure' script again."
 	exit 1
 
-/* Some machines have alloca built-in.
-   They should define HAVE_ALLOCA.
-   Some use the C version in alloca.c (these define C_ALLOCA in config.h).
-   */
-alloca.o: alloca.c blockinput.h atimer.h systime.h
-
 /* Nearly all the following files depend on lisp.h,
    but it is not included as a dependency because
    it is so often changed in ways that do not require any recompilation