misc/shlib

#!/bin/sh
##############################################################################
# Copyright 2020,2021 Thomas E. Dickey                                       #
# Copyright 1998-2005,2007 Free Software Foundation, Inc.                    #
#                                                                            #
# Permission is hereby granted, free of charge, to any person obtaining a    #
# copy of this software and associated documentation files (the "Software"), #
# to deal in the Software without restriction, including without limitation  #
# the rights to use, copy, modify, merge, publish, distribute, distribute    #
# with modifications, sublicense, and/or sell copies of the Software, and to #
# permit persons to whom the Software is furnished to do so, subject to the  #
# following conditions:                                                      #
#                                                                            #
# The above copyright notice and this permission notice shall be included in #
# all copies or substantial portions of the Software.                        #
#                                                                            #
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   #
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    #
# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      #
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    #
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        #
# DEALINGS IN THE SOFTWARE.                                                  #
#                                                                            #
# Except as contained in this notice, the name(s) of the above copyright     #
# holders shall not be used in advertising or otherwise to promote the sale, #
# use or other dealings in this Software without prior written               #
# authorization.                                                             #
##############################################################################
#
# Author: Thomas E. Dickey <dickey@clark.net> 1996
#
# $Id: shlib,v 1.14 2021/09/04 15:55:29 tom Exp $
# Use this script as a wrapper when running executables linked to shared
# libraries on systems that use the $LD_LIBRARY_PATH variable and don't embed
# the soname's path within the linked executable (such as IRIX), e.g,
#
#	shlib knight
#
# Setting LD_LIBRARY_PATH, overrides/supplements the loader's normal search
# path, and works on most systems.  The drawback is that then the environment
# variable has to be set to run the programs within this directory tree.
#
# For Linux (and other systems using the GNU loader), we can use the rpath
# directive, which embeds the pathname of the library within the executable.
# Using the Linux loader's rpath directive introduces a constraint, since
# it's embedded into the binary, and means that the binary cannot be moved
# around (though it'll work if the $exec_prefix convention that puts the bin
# and lib directories under the same parent is followed).
#
# Using the actual soname (e.g., ../lib/libncurses.so) alone, is a more
# flexible solution; you can link without having to set the environment
# variable, and on some systems (IRIX) you can even run the resulting binaries
# without setting LD_LIBRARY_PATH.
#
# Using a conventional link, with -L and -l options on Linux results in a
# statically linked executable, which we don't want at all.
#
# Special cases:
#
#	BeOS R4.5 uses $LIBRARY_PATH rather than $LD_LIBRARY_PATH.
#	Cygwin uses $PATH
#	Mac OS X uses $DYLD_LIBRARY_PATH
#
# Other cases not handled by this script:
#
#	AIX uses $LIBPATH
#	IRIX64 may use $LD_LIBRARY64_PATH or $LD_LIBRARYN32_PATH
#	Solaris may use $LD_LIBRARY_PATH_64
#
CDPATH=
#
# Make sure that we use the PATH that was set in run_tic.sh
if test -n "$SHLIB_PATH" ; then
	PATH=$SHLIB_PATH
	export PATH
fi

# Find the lib-directory for this build tree
q=""
for p in lib ../lib ../../lib ../../../lib
do
	if test -d $p; then
		q=`cd $p || exit; pwd`
		break
	elif test -f configure && test ! -d ../$p ; then
		break
	fi
done

# Set the environment variable.
if test -n "$q" ; then
	system=
	if test -n "$SHLIB_HOST" ; then
		system="$SHLIB_HOST"
	elif test -n "$PATHEXT" ; then
		system=cygwin
	elif test -n "$LIBRARY_PATH" ; then
		system=beos
	elif test -n "$DYLD_LIBRARY_PATH" ; then
		system=darwin
	elif test -n "$LD_LIBRARY_PATH"; then
		system=unix
	else
		for r in "$q"/*.*
		do
			if test -f "$r"
			then
				case $r in
				*.dll)
					system=cygwin
					;;
				*.dylib)
					system=darwin
					;;
				esac
			fi
			test -n "$system" && break
		done
	fi

	case .$system in
	.cygwin*)
		variable=PATH
		;;
	.beos*)
		variable=LIBRARY_PATH
		;;
	.darwin*)
		variable=DYLD_LIBRARY_PATH
		;;
	*)
		variable=LD_LIBRARY_PATH
		;;
	esac

	eval 'test -z "$'$variable'" && '$variable'=":"'
	eval $variable'="$q:$'$variable'"'
	eval 'export '$variable
fi

eval "$*"