1 files changed, 99 insertions, 0 deletions
diff --git a/build-aux/relocatable.sh.in b/build-aux/relocatable.sh.in
new file mode 100644
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+++ b/build-aux/relocatable.sh.in
@@ -0,0 +1,99 @@
+# The functions in this file provide support for relocatability of
+# shell scripts.  They should be included near the beginning of each
+# shell script in a relocatable program, by adding @relocatable_sh@
+# and causing the script to be expanded with AC_CONFIG_FILES.  A
+# small amount of additional code must be added and adapted to the
+# package by hand; see doc/relocatable-maint.texi (in Gnulib) for
+# details.
+#
+# Copyright (C) 2003-2014 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Support for relocatability.
+func_find_curr_installdir ()
+{
+  # Determine curr_installdir, even taking into account symlinks.
+  curr_executable="$0"
+  case "$curr_executable" in
+    */* | *\\*) ;;
+    *) # Need to look in the PATH.
+      if test "${PATH_SEPARATOR+set}" != set; then
+        # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+        # contains only /bin. Note that ksh looks also at the FPATH variable,
+        # so we have to set that as well for the test.
+        PATH_SEPARATOR=:
+        (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+          && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+                 || PATH_SEPARATOR=';'
+             }
+      fi
+      save_IFS="$IFS"; IFS="$PATH_SEPARATOR"
+      for dir in $PATH; do
+        IFS="$save_IFS"
+        test -z "$dir" && dir=.
+        for exec_ext in ''; do
+          if test -f "$dir/$curr_executable$exec_ext"; then
+            curr_executable="$dir/$curr_executable$exec_ext"
+            break 2
+          fi
+        done
+      done
+      IFS="$save_IFS"
+      ;;
+  esac
+  # Make absolute.
+  case "$curr_executable" in
+    /* | ?:/* | ?:\\*) ;;
+    *) curr_executable=`pwd`/"$curr_executable" ;;
+  esac
+  # Resolve symlinks.
+  sed_dirname='s,/[^/]*$,,'
+  sed_linkdest='s,^.* -> \(.*\),\1,p'
+  while : ; do
+    lsline=`LC_ALL=C ls -l "$curr_executable"`
+    case "$lsline" in
+      *" -> "*)
+        linkdest=`echo "$lsline" | sed -n -e "$sed_linkdest"`
+        case "$linkdest" in
+          /* | ?:/* | ?:\\*) curr_executable="$linkdest" ;;
+          *) curr_executable=`echo "$curr_executable" | sed -e "$sed_dirname"`/"$linkdest" ;;
+        esac ;;
+      *) break ;;
+    esac
+  done
+  curr_installdir=`echo "$curr_executable" | sed -e 's,/[^/]*$,,'`
+  # Canonicalize.
+  curr_installdir=`cd "$curr_installdir" && pwd`
+}
+func_find_prefixes ()
+{
+  # Compute the original/current installation prefixes by stripping the
+  # trailing directories off the original/current installation directories.
+  orig_installprefix="$orig_installdir"
+  curr_installprefix="$curr_installdir"
+  while true; do
+    orig_last=`echo "$orig_installprefix" | sed -n -e 's,^.*/\([^/]*\)$,\1,p'`
+    curr_last=`echo "$curr_installprefix" | sed -n -e 's,^.*/\([^/]*\)$,\1,p'`
+    if test -z "$orig_last" || test -z "$curr_last"; then
+      break
+    fi
+    if test "$orig_last" != "$curr_last"; then
+      break
+    fi
+    orig_installprefix=`echo "$orig_installprefix" | sed -e 's,/[^/]*$,,'`
+    curr_installprefix=`echo "$curr_installprefix" | sed -e 's,/[^/]*$,,'`
+  done
+}