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1 #! /bin/sh
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2
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3 # Script to translate LDFLAGS into a form suitable for use with libtool.
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4
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5 # Copyright (C) 2005-2014 Free Software Foundation, Inc.
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6 #
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7 # This file is free software; you can redistribute it and/or modify
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8 # it under the terms of the GNU General Public License as published by
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9 # the Free Software Foundation; either version 2 of the License, or
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10 # (at your option) any later version.
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11 #
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU General Public License for more details.
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16 #
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17 # You should have received a copy of the GNU General Public License
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18 # along with this program; if not, write to the Free Software
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19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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20 # MA 02110-1301, USA.
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21
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22 # Contributed by CodeSourcery, LLC.
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23
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24 # This script is designed to be used from a Makefile that uses libtool
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25 # to build libraries as follows:
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26 #
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27 # LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))
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28 #
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29 # Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.
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30
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31 # The output of the script. This string is built up as we process the
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32 # arguments.
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33 result=
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34 prev_arg=
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35
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36 for arg
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37 do
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38 case $arg in
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39 -f*|--*|-static-lib*|-shared-lib*|-B*)
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40 # Libtool does not ascribe any special meaning options
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41 # that begin with -f or with a double-dash. So, it will
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42 # think these options are linker options, and prefix them
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43 # with "-Wl,". Then, the compiler driver will ignore the
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44 # options. So, we prefix these options with -Xcompiler to
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45 # make clear to libtool that they are in fact compiler
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46 # options. Similarly for e.g. -static-libstdc++, or
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47 # -B/some/path.
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48 case $prev_arg in
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49 -Xpreprocessor|-Xcompiler|-Xlinker)
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50 # This option is already prefixed; don't prefix it again.
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51 ;;
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52 *)
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53 result="$result -Xcompiler"
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54 ;;
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55 esac
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56 ;;
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57 *)
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58 # We do not want to add -Xcompiler to other options because
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59 # that would prevent libtool itself from recognizing them.
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60 ;;
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61 esac
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62 prev_arg=$arg
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63
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64 # If $(LDFLAGS) is (say):
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65 # a "b'c d" e
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66 # then the user expects that:
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67 # $(LD) $(LDFLAGS)
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68 # will pass three arguments to $(LD):
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69 # 1) a
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70 # 2) b'c d
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71 # 3) e
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72 # We must ensure, therefore, that the arguments are appropriately
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73 # quoted so that using:
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74 # libtool --mode=link ... $(LTLDFLAGS)
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75 # will result in the same number of arguments being passed to
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76 # libtool. In other words, when this script was invoked, the shell
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77 # removed one level of quoting, present in $(LDFLAGS); we have to put
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78 # it back.
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79
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80 # Quote any embedded single quotes.
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81 case $arg in
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82 *"'"*)
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83 # The following command creates the script:
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84 # 1s,^X,,;s|'|'"'"'|g
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85 # which removes a leading X, and then quotes and embedded single
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86 # quotes.
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87 sed_script="1s,^X,,;s|'|'\"'\"'|g"
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88 # Add a leading "X" so that if $arg starts with a dash,
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89 # the echo command will not try to interpret the argument
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90 # as a command-line option.
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91 arg="X$arg"
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92 # Generate the quoted string.
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93 quoted_arg=`echo "$arg" | sed -e "$sed_script"`
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94 ;;
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95 *)
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96 quoted_arg=$arg
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97 ;;
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98 esac
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99 # Surround the entire argument with single quotes.
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100 quoted_arg="'"$quoted_arg"'"
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101
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102 # Add it to the string.
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103 result="$result $quoted_arg"
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104 done
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105
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106 # Output the string we have built up.
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107 echo "$result"
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