AC_PROG_INSTALL underquoting

[Eric Blake]

This bug has been present for years; in particular, the [cC] glob hasn't worked 
since programs.m4 was introduced in 2001.

From: Eric Blake <address@hidden>
Date: Fri, 24 Oct 2008 17:10:08 -0600
Subject: [PATCH] Fix m4 underquoting in AC_PROG_INSTALL.

* lib/autoconf/programs.m4 (AC_PROG_INSTALL): Produce accurate
character ranges.

Signed-off-by: Eric Blake <address@hidden>
---
 ChangeLog                |    4 ++++
 lib/autoconf/programs.m4 |    6 +++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a485066..2a57e79 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2008-10-24  Eric Blake  <address@hidden>
 
+       Fix m4 underquoting in AC_PROG_INSTALL.
+       * lib/autoconf/programs.m4 (AC_PROG_INSTALL): Produce accurate
+       character ranges.
+
        Speed up AC_CHECK_HEADER.
        * lib/autoconf/headers.m4 (AC_CHECK_HEADER): Factor out address@hidden
 
diff --git a/lib/autoconf/programs.m4 b/lib/autoconf/programs.m4
index 45a74b5..6e79cdc 100644
--- a/lib/autoconf/programs.m4
+++ b/lib/autoconf/programs.m4
@@ -565,13 +565,13 @@ AC_MSG_CHECKING([for a BSD-compatible install])
 if test -z "$INSTALL"; then
 AC_CACHE_VAL(ac_cv_path_install,
 [_AS_PATH_WALK([$PATH],
-[# Account for people who put trailing slashes in PATH elements.
-case $as_dir/ in
+[[# Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in @%:@((
   ./ | .// | /[cC]/* | \
   /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
   ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
   /usr/ucb/* ) ;;
-  *)
+  *)]
     # OSF1 and SCO ODT 3.0 have their own names for install.
     # Don't use installbsd from OSF since it installs stuff as root
     # by default.
-- 
1.6.0.2