FYI: mkdir -p problems in config.status

[Akim Demaille]

>From a bug report on Bison.

Index: ChangeLog
from  Akim Demaille  <address@hidden>

        * lib/m4sugar/m4sh.m4 (AS_SHELL_SANITIZE): Invoke
        _AS_MKDIR_P_PREPARE.

Index: NEWS
===================================================================
RCS file: /cvsroot/autoconf/autoconf/NEWS,v
retrieving revision 1.225
diff -u -u -r1.225 NEWS
--- NEWS 14 Mar 2002 17:25:13 -0000 1.225
+++ NEWS 2 Apr 2002 15:12:30 -0000
@@ -4,6 +4,11 @@
 
 - autoreconf is adjusted to GNU Gettext 0.11.
 
+** Bug fixes
+
+- config.status 2.53 may fail on some architectures where `mkdir -p'
+  fails on existing directories.
+
 
 * Major changes in Autoconf 2.53
 
Index: lib/m4sugar/m4sh.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/m4sugar/m4sh.m4,v
retrieving revision 1.79
diff -u -u -r1.79 m4sh.m4
--- lib/m4sugar/m4sh.m4 27 Mar 2002 20:33:03 -0000 1.79
+++ lib/m4sugar/m4sh.m4 2 Apr 2002 15:12:31 -0000
@@ -137,6 +137,17 @@
 # AS_SHELL_SANITIZE
 # -----------------
 # Try to be as Bourne and/or POSIX as possible.
+#
+# This macro has a very special status.  Normal use of M4sh relies
+# heavily on AS_REQUIRE, so that needed initiatizations (such as
+# _AS_TEST_PREPARE) are performed on need, not on demand.  But
+# Autoconf is the first client of M4sh, and for two reasons: configure
+# and config.status.  Relying on AS_REQUIRE is of course fine for
+# configure, but fails for config.status (which is created by
+# configure).  So we need a means to force the inclusion of the
+# various _AS_PREPARE_* on top of config.status.  That's basically why
+# there are so many _AS_PREPARE_* below, and that's also why it is
+# important not to forget some: config.status needs them.
 m4_defun([AS_SHELL_SANITIZE],
 [
 ## --------------------- ##
@@ -173,6 +184,7 @@
 _AS_ECHO_N_PREPARE
 _AS_EXPR_PREPARE
 _AS_LN_S_PREPARE
+_AS_MKDIR_P_PREPARE
 _AS_TEST_PREPARE
 _AS_TR_CPP_PREPARE
 _AS_TR_SH_PREPARE