plink.sh revision 4419d26b 
1#!/bin/sh
2# $XTermId: plink.sh,v 1.16 2022/02/13 14:30:17 tom 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
47while [ $# != 0 ]
48do
49	if [ $ASNEED = no ] && [ -n "$LINKIT" ]
50	then
51		ASNEED=yes
52		OPT=-Wl,-as-needed
53		warned=`mktemp`
54		trap "rm -f $warned; exit 1" 1 2 3 15
55		trap "rm -f $warned" 0
56		if ( eval $LINKIT $OPT $NO_LTO "$@" >"$warned" 2>&1 )
57		then
58			WARNED=`cat "$warned"`
59			rm -f "$warned"
60			case ".$WARNED" in
61			*Warning*|*nsupported*|*nrecognized*|*nknown*)
62				;;
63			*)
64				LINKIT="$LINKIT $OPT $*"
65				break
66				;;
67			esac
68		else
69			rm -f "$warned"
70		fi
71	fi
72
73	OPT="$1"
74	shift
75	case $OPT in
76	-k*)
77		OPT=`echo "$OPT" | sed -e 's/^-k/-l/'`
78		echo "always use $OPT (cannot test if needed)"
79		LINKIT="$LINKIT $OPT"
80		;;
81	-l*)
82		echo "testing if $OPT is needed"
83		if ( eval $LINKIT $NO_LTO "$@" >/dev/null 2>&1 )
84		then
85			: echo ...no
86		else
87			echo ...yes
88			LINKIT="$LINKIT $OPT"
89		fi
90		;;
91	*)
92		LINKIT="$LINKIT $OPT"
93		;;
94	esac
95done
96eval $LINKIT
97