1#!/bin/sh
2# $XTermId: plink.sh,v 1.17 2022/03/13 18:27:29 Ryan.Schmidt Exp $
3# -----------------------------------------------------------------------------
4# this file is part of xterm
5#
6# Copyright 2001-2021,2022 by Thomas E. Dickey
7#
8#                         All Rights Reserved
9#
10# Permission is hereby granted, free of charge, to any person obtaining a
11# copy of this software and associated documentation files (the
12# "Software"), to deal in the Software without restriction, including
13# without limitation the rights to use, copy, modify, merge, publish,
14# distribute, sublicense, and/or sell copies of the Software, and to
15# permit persons to whom the Software is furnished to do so, subject to
16# the following conditions:
17#
18# The above copyright notice and this permission notice shall be included
19# in all copies or substantial portions of the Software.
20#
21# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24# IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
25# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
26# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
27# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28#
29# Except as contained in this notice, the name(s) of the above copyright
30# holders shall not be used in advertising or otherwise to promote the
31# sale, use or other dealings in this Software without prior written
32# authorization.
33# -----------------------------------------------------------------------------
34#
35# Reduce the number of dynamic libraries used to link an executable.
36LINKIT=
37ASNEED=no
38NO_LTO=
39
40# gcc's link-time optimization is very slow - reduce usage of that.
41case "$*" in
42*-flto=*|-flto\ )
43	NO_LTO=-fno-lto
44	;;
45esac
46
47: "${TMPDIR=/tmp}"
48
49while [ $# != 0 ]
50do
51	if [ $ASNEED = no ] && [ -n "$LINKIT" ]
52	then
53		ASNEED=yes
54		OPT=-Wl,-as-needed
55		warned=`mktemp "$TMPDIR/xterm.XXXXXXXX"`
56		trap "rm -f $warned; exit 1" 1 2 3 15
57		trap "rm -f $warned" 0
58		if ( eval $LINKIT $OPT $NO_LTO "$@" >"$warned" 2>&1 )
59		then
60			WARNED=`cat "$warned"`
61			rm -f "$warned"
62			case ".$WARNED" in
63			*Warning*|*nsupported*|*nrecognized*|*nknown*)
64				;;
65			*)
66				LINKIT="$LINKIT $OPT $*"
67				break
68				;;
69			esac
70		else
71			rm -f "$warned"
72		fi
73	fi
74
75	OPT="$1"
76	shift
77	case $OPT in
78	-k*)
79		OPT=`echo "$OPT" | sed -e 's/^-k/-l/'`
80		echo "always use $OPT (cannot test if needed)"
81		LINKIT="$LINKIT $OPT"
82		;;
83	-l*)
84		echo "testing if $OPT is needed"
85		if ( eval $LINKIT $NO_LTO "$@" >/dev/null 2>&1 )
86		then
87			: echo ...no
88		else
89			echo ...yes
90			LINKIT="$LINKIT $OPT"
91		fi
92		;;
93	*)
94		LINKIT="$LINKIT $OPT"
95		;;
96	esac
97done
98eval $LINKIT
99