1#! /bin/sh
2
3# Script to translate LDFLAGS into a form suitable for use with libtool.
4
5# Copyright (C) 2005 Free Software Foundation, Inc.
6#
7# This file is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
20# MA 02110-1301, USA.
21
22# Contributed by CodeSourcery, LLC.
23
24# This script is designed to be used from a Makefile that uses libtool
25# to build libraries as follows:
26#
27#   LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))
28#
29# Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.
30
31# The output of the script.  This string is built up as we process the
32# arguments.
33result=
34prev_arg=
35
36for arg
37do
38    case $arg in
39	-f*|--*)
40	    # Libtool does not ascribe any special meaning options
41	    # that begin with -f or with a double-dash.  So, it will
42	    # think these options are linker options, and prefix them
43	    # with "-Wl,".  Then, the compiler driver will ignore the
44	    # options.  So, we prefix these options with -Xcompiler to
45	    # make clear to libtool that they are in fact compiler
46	    # options.
47	    case $prev_arg in
48		-Xpreprocessor|-Xcompiler|-Xlinker)
49		    # This option is already prefixed; don't prefix it again.
50		    ;;
51		*)
52		    result="$result -Xcompiler"
53		    ;;
54	    esac
55	    ;;
56	*)
57	    # We do not want to add -Xcompiler to other options because
58	    # that would prevent libtool itself from recognizing them.
59	    ;;
60    esac
61    prev_arg=$arg
62
63    # If $(LDFLAGS) is (say):
64    #   a "b'c d" e
65    # then the user expects that:
66    #   $(LD) $(LDFLAGS)
67    # will pass three arguments to $(LD):
68    #   1) a
69    #   2) b'c d
70    #   3) e
71    # We must ensure, therefore, that the arguments are appropriately
72    # quoted so that using:
73    #   libtool --mode=link ... $(LTLDFLAGS)
74    # will result in the same number of arguments being passed to
75    # libtool.   In other words, when this script was invoked, the shell
76    # removed one level of quoting, present in $(LDFLAGS); we have to put
77    # it back.
78
79    # Quote any embedded single quotes.
80    case $arg in
81	*"'"*)
82	    # The following command creates the script:
83	    #   1s,^X,,;s|'|'"'"'|g
84	    # which removes a leading X, and then quotes and embedded single
85	    # quotes.
86	    sed_script="1s,^X,,;s|'|'\"'\"'|g"
87	    # Add a leading "X" so that if $arg starts with a dash,
88	    # the echo command will not try to interpret the argument
89	    # as a command-line option.
90	    arg="X$arg"
91	    # Generate the quoted string.
92	    quoted_arg=`echo "$arg" | sed -e "$sed_script"`
93	    ;;
94	*)
95	    quoted_arg=$arg
96	    ;;
97    esac
98    # Surround the entire argument with single quotes.
99    quoted_arg="'"$quoted_arg"'"
100
101    # Add it to the string.
102    result="$result $quoted_arg"
103done
104
105# Output the string we have built up.
106echo "$result"
107