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[official-gcc.git] / libtool-ldflags
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1 #! /bin/sh
3 # Script to translate LDFLAGS into a form suitable for use with libtool.
5 # Copyright (C) 2005 Free Software Foundation, Inc.
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.
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.
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.
22 # Contributed by CodeSourcery, LLC.
24 # This script is designed to be used from a Makefile that uses libtool
25 # to build libraries as follows:
27 # LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))
29 # Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.
31 # The output of the script. This string is built up as we process the
32 # arguments.
33 result=
35 for arg
37 case $arg in
38 -f*|--*)
39 # Libtool does not ascribe any special meaning options
40 # that begin with -f or with a double-dash. So, it will
41 # think these options are linker options, and prefix them
42 # with "-Wl,". Then, the compiler driver will ignore the
43 # options. So, we prefix these options with -Xcompiler to
44 # make clear to libtool that they are in fact compiler
45 # options.
46 result="$result -Xcompiler"
49 # We do not want to add -Xcompiler to other options because
50 # that would prevent libtool itself from recognizing them.
52 esac
54 # If $(LDFLAGS) is (say):
55 # a "b'c d" e
56 # then the user expects that:
57 # $(LD) $(LDFLAGS)
58 # will pass three arguments to $(LD):
59 # 1) a
60 # 2) b'c d
61 # 3) e
62 # We must ensure, therefore, that the arguments are appropriately
63 # quoted so that using:
64 # libtool --mode=link ... $(LTLDFLAGS)
65 # will result in the same number of arguments being passed to
66 # libtool. In other words, when this script was invoked, the shell
67 # removed one level of quoting, present in $(LDFLAGS); we have to put
68 # it back.
70 # Quote any embedded single quotes.
71 case $arg in
72 *"'"*)
73 # The following command creates the script:
74 # 1s,^X,,;s|'|'"'"'|g
75 # which removes a leading X, and then quotes and embedded single
76 # quotes.
77 sed_script="1s,^X,,;s|'|'\"'\"'|g"
78 # Add a leading "X" so that if $arg starts with a dash,
79 # the echo command will not try to interpret the argument
80 # as a command-line option.
81 arg="X$arg"
82 # Generate the quoted string.
83 quoted_arg=`echo "$arg" | sed -e "$sed_script"`
86 quoted_arg=$arg
88 esac
89 # Surround the entire argument with single quotes.
90 quoted_arg="'"$quoted_arg"'"
92 # Add it to the string.
93 result="$result $quoted_arg"
94 done
96 # Output the string we have built up.
97 echo "$result"