2002-07-20 Han-Wen <hanwen@cs.uu.nl>

* *.c: add space after commas everywhere.

* *.c: use SCM_VECTOR_SET everywhere, where a vector is written.
Document cases where SCM_WRITABLE_VELTS() is used.

* vectors.h (SCM_VELTS): prepare for write barrier, and let
SCM_VELTS() return a const pointer
(SCM_VECTOR_SET): add macro.

* autogen.sh (mscripts): find and check version number of
autoconf. Complain if 2.53 is not found.

autogen.sh

@@ -85,8 +85,26 @@ fi
 
 ######################################################################
 
-autoheader
-autoconf
+
+# configure.in reqs autoconf-2.53; try to find it
+for suf in "-2.53" "2.53" ""  false; do
+  version=`autoconf$suf --version 2>/dev/null | head -1 | awk '{print $NF}' | awk -F. '{print $1 * 100 + $2}'`
+  if test "0$version" -eq 253; then
+    autoconf=autoconf$suf
+    autoheader=autoheader$suf
+    break
+  fi
+done
+
+if test -z "$autoconf"; then
+    echo "ERROR: Please install autoconf 2.53"
+    exit 1
+fi
+
+
+################################################################
+$autoheader
+$autoconf
 
 # Automake has a bug that will let it only add one copy of a missing
 # file.  We need two mdate-sh, tho, one in doc/ref/ and one in