+BUILT_SOURCES += $(ALLOCA_H)
+EXTRA_DIST += alloca_.h
+
+# We need the following in order to create an <alloca.h> when the system
+# doesn't have one that works with the given compiler.
+all-local $(lib_OBJECTS): $(ALLOCA_H)
+alloca.h: alloca_.h
+ cp $(srcdir)/alloca_.h $@-t
+ mv $@-t $@
+MOSTLYCLEANFILES += alloca.h alloca.h-t