File: pre-inst-guile.in

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#!/bin/sh

#	Copyright (C) 2002, 2006, 2008 Free Software Foundation
#
#   This file is part of GUILE.
#
#   GUILE 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 2, or
#   (at your option) any later version.
#
#   GUILE 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 GUILE; see the file COPYING.  If not, write
#   to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
#   Floor, Boston, MA 02110-1301 USA

# NOTE: at some point we might consider invoking this under
# pre-inst-guile-env.  If this will work, then most of the code below
# can be removed.

# NOTE: If you update this file, please update pre-inst-guile-env.in
# as well, if appropriate.

# Commentary:

# Usage: pre-inst-guile [ARGS]
#
# This script arranges for the environment to support, and eventaully execs,
# the uninstalled binary guile executable located somewhere under libguile/,
# passing ARGS to it.  In the process, env var GUILE is clobbered, and the
# following env vars are modified (but not clobbered):
#   GUILE_LOAD_PATH
#   LTDL_LIBRARY_PATH
#
# This script can be used as a drop-in replacement for $bindir/guile;
# if there is a discrepency in behavior, that's a bug.

# Code:

# config
subdirs_with_ltlibs="srfi guile-readline"       # maintain me

# env (set by configure)
top_srcdir="@top_srcdir_absolute@"
top_builddir="@top_builddir_absolute@"

[ x"$top_srcdir"   = x -o ! -d "$top_srcdir" -o \
  x"$top_builddir" = x -o ! -d "$top_builddir" ] && {
    echo $0: bad environment
    echo top_srcdir=$top_srcdir
    echo top_builddir=$top_builddir
    exit 1
}

# handle GUILE_LOAD_PATH (no clobber)
if [ x"$GUILE_LOAD_PATH" = x ]
then
    GUILE_LOAD_PATH="${top_srcdir}/guile-readline:${top_srcdir}"
else
  for d in "${top_srcdir}" "${top_srcdir}/guile-readline"
  do
    # This hair prevents double inclusion.
    # The ":" prevents prefix aliasing.
    case x"$GUILE_LOAD_PATH" in
      x*${d}:*) ;;
      *) GUILE_LOAD_PATH="${d}:$GUILE_LOAD_PATH" ;;
    esac
  done
fi
export GUILE_LOAD_PATH

# handle LTDL_LIBRARY_PATH (no clobber)
ltdl_prefix=""
dyld_prefix=""
for dir in $subdirs_with_ltlibs ; do
    ltdl_prefix="${top_builddir}/${dir}:${ltdl_prefix}"
    dyld_prefix="${top_builddir}/${dir}/.libs:${dyld_prefix}"
done
LTDL_LIBRARY_PATH="${ltdl_prefix}$LTDL_LIBRARY_PATH"
export LTDL_LIBRARY_PATH
DYLD_LIBRARY_PATH="${dyld_prefix}${top_builddir}/libguile/.libs:$DYLD_LIBRARY_PATH"
export DYLD_LIBRARY_PATH

# set GUILE (clobber)
GUILE=${top_builddir}/libguile/guile
export GUILE

# do it
exec $GUILE "$@"

# never reached
exit 1

# pre-inst-guile ends here