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#! /bin/sh

# Script to translate LDFLAGS into a form suitable for use with libtool.

# Copyright (C) 2005 Free Software Foundation, Inc.

#

# This file is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

# MA 02110-1301, USA.

# Contributed by CodeSourcery, LLC.

# This script is designed to be used from a Makefile that uses libtool

# to build libraries as follows:

#

#   LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))

#

# Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.

# The output of the script.  This string is built up as we process the

# arguments.

result=

for arg

do

    case $arg in

        -f*|--*)

            # Libtool does not ascribe any special meaning options

            # that begin with -f or with a double-dash.  So, it will

            # think these options are linker options, and prefix them

            # with "-Wl,".  Then, the compiler driver will ignore the

            # options.  So, we prefix these options with -Xcompiler to

            # make clear to libtool that they are in fact compiler

            # options.

            result="$result -Xcompiler"

            ;;

        *)

            # We do not want to add -Xcompiler to other options because

            # that would prevent libtool itself from recognizing them.

            ;;

    esac

    # If $(LDFLAGS) is (say):

    #   a "b'c d" e

    # then the user expects that:

    #   $(LD) $(LDFLAGS)

    # will pass three arguments to $(LD):

    #   1) a

    #   2) b'c d

    #   3) e

    # We must ensure, therefore, that the arguments are appropriately

    # quoted so that using:

    #   libtool --mode=link ... $(LTLDFLAGS)

    # will result in the same number of arguments being passed to

    # libtool.   In other words, when this script was invoked, the shell

    # removed one level of quoting, present in $(LDFLAGS); we have to put

    # it back.

    # Quote any embedded single quotes.

    case $arg in

        *"'"*)

            # The following command creates the script:

            #   1s,^X,,;s|'|'"'"'|g

            # which removes a leading X, and then quotes and embedded single

            # quotes.

            sed_script="1s,^X,,;s|'|'\"'\"'|g"

            # Add a leading "X" so that if $arg starts with a dash,

            # the echo command will not try to interpret the argument

            # as a command-line option.

            arg="X$arg"

            # Generate the quoted string.

            quoted_arg=`echo "$arg" | sed -e "$sed_script"`

            ;;

        *)

            quoted_arg=$arg

            ;;

    esac

    # Surround the entire argument with single quotes.

    quoted_arg="'"$quoted_arg"'"

    # Add it to the string.

    result="$result $quoted_arg"

done

# Output the string we have built up.

echo "$result"