New node, documenting AS_DIRNAME.
(Limitations of Usual Tools): Refer to it when discussing dirname.
Also, update discussion of POSIX standard to reflect latest draft.
2001-09-18 Paul Eggert <eggert@twinsun.com>
+ * doc/autoconf.texi (Common Shell Constructs): New node,
+ documenting AS_DIRNAME.
+ (Limitations of Usual Tools): Refer to it when discussing dirname.
+ Also, update discussion of POSIX standard to reflect latest draft.
+
* lib/autoconf/c.m4:
(AC_LANG_INT_SAVE(C)): Also support negative values, down to LONG_MIN.