* acconfig.h: add HAVE_ARRAYS.

* configure.in: add --disable-arrays option, probably temporary.

	* the following changes allow guile to be built with the array
	"module" omitted.  some of this stuff is just tc7 type support,
	which wouldn't be needed if uniform array types were converted
	to smobs.

	* tag.c (scm_utag_bvect ... scm_utag_cvect): don't define unless
	HAVE_ARRAYS.
	(scm_tag): don't check array types unless HAVE_ARRAYS.

	* sort.c (scm_restricted_vector_sort_x, scm_sorted_p):
	remove the unused array types.
	* (scm_stable_sort, scm_sort): don't support vectors if not
	HAVE_ARRAYS.  a bit excessive.

	* random.c (vector_scale, vector_sum_squares,
	scm_random_solid_sphere_x, scm_random_hollow_sphere_x,
	scm_random_normal_vector_x): don't define unless HAVE_ARRAYS.

	* gh_data.c (makvect, gh_chars2byvect, gh_shorts2svect,
	gh_longs2ivect,	gh_ulongs2uvect, gh_floats2fvect, gh_doubles2dvect,
	gh_uniform_vector_length, gh_uniform_vector_ref):
	don't define unless HAVE_ARRAYS.
	(gh_scm2chars, gh_scm2shorts, gh_scm2longs, gh_scm2floats,
	gh_scm2doubles):
	don't check vector types if not HAVE_ARRAYS.

	* eq.c (scm_equal_p), eval.c (SCM_CEVAL), print.c (scm_iprin1),
	gc.c (scm_gc_mark, scm_gc_sweep), objects.c (scm_class_of):
	don't support the array types unless HAVE_ARRAYS is defined.

	* tags.h: make nine tc7 types conditional on HAVE_ARRAYS.

	* read.c (scm_lreadr): don't check for #* unless HAVE_ARRAYS is
	defined (this should use read-hash-extend).

	* ramap.c, unif.c: don't check whether ARRAYS is defined.

	* vectors.c (scm_vector_set_length_x): moved here from unif.c.  call
	scm_uniform_element_size if HAVE_ARRAYS.
	vectors.h: prototype too.

	* unif.c (scm_uniform_element_size): new procedure.

	* init.c (scm_boot_guile_1): don't call scm_init_ramap or
	scm_init_unif unless HAVE_ARRAYS is defined.

	* __scm.h: don't define ARRAYS.

	* Makefile.am (EXTRA_libguile_la_SOURCES): unif.c and ramap.c
	moved here from	libguile_la_SOURCES.


	* Makefile.am (ice9_sources): add arrays.scm.

	* boot-9.scm: load arrays.scm if 'array is provided.

	* arrays.scm: new file with stuff from boot-9.scm.

libguile/vectors.c

@@ -47,6 +47,76 @@
 #include "vectors.h"
 
 
+/* 
+ * This complicates things too much if allowed on any array.
+ * C code can safely call it on arrays known to be used in a single
+ * threaded manner.
+ *
+ * SCM_PROC(s_vector_set_length_x, "vector-set-length!", 2, 0, 0, scm_vector_set_length_x); 
+ */
+static char s_vector_set_length_x[] = "vector-set-length!";
+
+
+SCM 
+scm_vector_set_length_x (vect, len)
+     SCM vect;
+     SCM len;
+{
+  long l;
+  scm_sizet siz;
+  scm_sizet sz;
+
+  l = SCM_INUM (len);
+  SCM_ASRTGO (SCM_NIMP (vect), badarg1);
+
+#ifdef HAVE_ARRAYS
+  if (SCM_TYP7 (vect) == scm_tc7_bvect)
+    {
+      l = (l + SCM_LONG_BIT - 1) / SCM_LONG_BIT;
+    }
+  sz = scm_uniform_element_size (vect);
+  if (sz == 0)
+#endif
+  switch (SCM_TYP7 (vect))
+    {
+    default:
+    badarg1: scm_wta (vect, (char *) SCM_ARG1, s_vector_set_length_x);
+    case scm_tc7_string:
+      SCM_ASRTGO (vect != scm_nullstr, badarg1);
+      sz = sizeof (char);
+      l++;
+      break;
+    case scm_tc7_vector:
+    case scm_tc7_wvect:
+      SCM_ASRTGO (vect != scm_nullvect, badarg1);
+      sz = sizeof (SCM);
+      break;
+    }
+  SCM_ASSERT (SCM_INUMP (len), len, SCM_ARG2, s_vector_set_length_x);
+  if (!l)
+    l = 1L;
+  siz = l * sz;
+  if (siz != l * sz)
+    scm_wta (SCM_MAKINUM (l * sz), (char *) SCM_NALLOC, s_vector_set_length_x);
+  SCM_REDEFER_INTS;
+  SCM_SETCHARS (vect,
+	    ((char *)
+	     scm_must_realloc (SCM_CHARS (vect),
+			       (long) SCM_LENGTH (vect) * sz,
+			       (long) siz,
+			       s_vector_set_length_x)));
+  if (SCM_VECTORP (vect))
+    {
+      sz = SCM_LENGTH (vect);
+      while (l > sz)
+	SCM_VELTS (vect)[--l] = SCM_UNSPECIFIED;
+    }
+  else if (SCM_STRINGP (vect))
+    SCM_CHARS (vect)[l - 1] = 0;
+  SCM_SETLENGTH (vect, SCM_INUM (len), SCM_TYP7 (vect));
+  SCM_REALLOW_INTS;
+  return vect;
+}
 
 SCM_PROC(s_vector_p, "vector?", 1, 0, 0, scm_vector_p);
 
@@ -263,5 +333,7 @@ void
 scm_init_vectors ()
 {
 #include "vectors.x"
+  /*
+    scm_make_subr (s_resizuve, scm_tc7_subr_2, scm_vector_set_length_x); */
 }