build: update gnulib submodule to latest; also bootstrap and init.sh

* bootstrap: Update from gnulib.
* tests/init.sh: Likewise.

bootstrap

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2012-02-11.09; # UTC
+scriptversion=2012-04-26.13; # UTC
 
 # Bootstrap this package from checked-out sources.
 
@@ -36,6 +36,10 @@ nl='
 LC_ALL=C
 export LC_ALL
 
+# Ensure that CDPATH is not set.  Otherwise, the output from cd
+# would cause trouble in at least one use below.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
 local_gl_dir=gl
 
 me=$0
@@ -423,12 +427,28 @@ check_versions() {
       $use_git || continue
     fi
     # Honor $APP variables ($TAR, $AUTOCONF, etc.)
-    appvar=`echo $app | tr '[a-z]-' '[A-Z]_'`
+    appvar=`echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_'`
     test "$appvar" = TAR && appvar=AMTAR
     case $appvar in
         GZIP) ;; # Do not use $GZIP:  it contains gzip options.
         *) eval "app=\${$appvar-$app}" ;;
     esac
+
+    # Handle the still-experimental Automake-NG programs specially.
+    # They remain named as the mainstream Automake programs ("automake",
+    # and "aclocal") to avoid gratuitous incompatibilities with
+    # pre-existing usages (by, say, autoreconf, or custom autogen.sh
+    # scripts), but correctly identify themselves (as being part of
+    # "GNU automake-ng") when asked their version.
+    case $app in
+      automake-ng|aclocal-ng)
+        app=`echo "$app" | sed 's/-ng$//'`
+        ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
+          echo "$me: Error: '$app' not found or not from Automake-NG" >&2
+          ret=1
+          continue
+        } ;;
+    esac
     if [ "$req_ver" = "-" ]; then
       # Merely require app to exist; not all prereq apps are well-behaved
       # so we have to rely on $? rather than get_version.
@@ -758,9 +778,15 @@ fi
 # Autoreconf runs aclocal before libtoolize, which causes spurious
 # warnings if the initial aclocal is confused by the libtoolized
 # (or worse out-of-date) macro directory.
+# libtoolize 1.9b added the --install option; but we support back
+# to libtoolize 1.5.22, where the install action was default.
 if test $use_libtool = 1; then
-  echo "running: $LIBTOOLIZE --copy --install"
-  $LIBTOOLIZE --copy --install
+  install=
+  case $($LIBTOOLIZE --help) in
+    *--install*) install=--install ;;
+  esac
+  echo "running: $LIBTOOLIZE $install --copy"
+  $LIBTOOLIZE $install --copy
 fi
 
 version_controlled_file() {
@@ -863,6 +889,16 @@ if test $with_gettext = yes; then
     }
   ' po/Makevars.template >po/Makevars || exit 1
 
+  # If the 'gettext' module is in use, grab the latest Makefile.in.in.
+  # If only the 'gettext-h' module is in use, assume autopoint already
+  # put the correct version of this file into place.
+  case $gnulib_modules in
+  *gettext-h*) ;;
+  *gettext*)
+    cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in || exit 1
+    ;;
+  esac
+
   if test -d runtime-po; then
     # Similarly for runtime-po/Makevars, but not quite the same.
     rm -f runtime-po/Makevars

gnulib

@@ -1 +1 @@
-Subproject commit 639607db00b96f33b0e18afa27188456c6ccad0a
+Subproject commit a3a049672d410b1deba8f1537016f2ece42b4e88

tests/init.sh

@@ -207,6 +207,14 @@ else
   fi
 fi
 
+# If this is bash, turn off all aliases.
+test -n "$BASH_VERSION" && unalias -a
+
+# Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
+# PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
+# That is part of the shell-selection test above.  Why use aliases rather
+# than functions?  Because support for hyphen-containing aliases is more
+# widespread than that for hyphen-containing function names.
 test -n "$EXEEXT" && shopt -s expand_aliases
 
 # Enable glibc's malloc-perturbing option.
@@ -242,20 +250,23 @@ compare_dev_null_ ()
 
   if test "x$1" = x/dev/null; then
     test -s "$2" || return 0
-    { emit_diff_u_header_ "$@"; sed 's/^/+/' -- "$2"; } >&2
+    emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
     return 1
   fi
 
   if test "x$2" = x/dev/null; then
     test -s "$1" || return 0
-    { emit_diff_u_header_ "$@"; sed 's/^/-/' -- "$1"; } >&2
+    emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
     return 1
   fi
 
   return 2
 }
 
-if diff_out_=`( diff -u "$0" "$0" < /dev/null ) 2>/dev/null`; then
+if diff_out_=`exec 2>/dev/null; diff -u "$0" "$0" < /dev/null` \
+   && diff -u Makefile "$0" 2>/dev/null | grep '^[+]#!' >/dev/null; then
+  # diff accepts the -u option and does not (like AIX 7 'diff') produce an
+  # extra space on column 1 of every content line.
   if test -z "$diff_out_"; then
     compare_ () { diff -u "$@"; }
   else
@@ -273,7 +284,7 @@ if diff_out_=`( diff -u "$0" "$0" < /dev/null ) 2>/dev/null`; then
       fi
     }
   fi
-elif diff_out_=`( diff -c "$0" "$0" < /dev/null ) 2>/dev/null`; then
+elif diff_out_=`exec 2>/dev/null; diff -c "$0" "$0" < /dev/null`; then
   if test -z "$diff_out_"; then
     compare_ () { diff -c "$@"; }
   else
@@ -304,11 +315,17 @@ fi
 # Otherwise, propagate $? to caller: any diffs have already been printed.
 compare ()
 {
-  compare_dev_null_ "$@"
-  case $? in
-    0|1) return $?;;
-    *) compare_ "$@";;
-  esac
+  # This looks like it can be factored to use a simple "case $?"
+  # after unchecked compare_dev_null_ invocation, but that would
+  # fail in a "set -e" environment.
+  if compare_dev_null_ "$@"; then
+    return 0
+  else
+    case $? in
+      1) return 1;;
+      *) compare_ "$@";;
+    esac
+  fi
 }
 
 # An arbitrary prefix to help distinguish test directories.
@@ -521,7 +538,7 @@ mktempd_ ()
   esac
 
   # First, try to use mktemp.
-  d=`unset TMPDIR; mktemp -d -t -p "$destdir_" "$template_" 2>/dev/null` \
+  d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` \
     || fail=1
 
   # The resulting name must be in the specified directory.