#! /bin/sh
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# Script to translate LDFLAGS into a form suitable for use with libtool.
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# Copyright (C) 2005 Free Software Foundation, Inc.
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#
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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# Contributed by CodeSourcery, LLC.
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# This script is designed to be used from a Makefile that uses libtool
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# to build libraries as follows:
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#
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# LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))
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#
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# Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.
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# The output of the script. This string is built up as we process the
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# arguments.
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result=
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prev_arg=
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for arg
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do
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case $arg in
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-f*|--*)
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# Libtool does not ascribe any special meaning options
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# that begin with -f or with a double-dash. So, it will
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# think these options are linker options, and prefix them
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# with "-Wl,". Then, the compiler driver will ignore the
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# options. So, we prefix these options with -Xcompiler to
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# make clear to libtool that they are in fact compiler
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# options.
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case $prev_arg in
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-Xpreprocessor|-Xcompiler|-Xlinker)
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# This option is already prefixed; don't prefix it again.
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;;
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*)
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result="$result -Xcompiler"
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;;
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esac
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;;
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*)
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# We do not want to add -Xcompiler to other options because
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# that would prevent libtool itself from recognizing them.
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;;
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esac
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prev_arg=$arg
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# If $(LDFLAGS) is (say):
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# a "b'c d" e
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# then the user expects that:
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# $(LD) $(LDFLAGS)
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# will pass three arguments to $(LD):
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# 1) a
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# 2) b'c d
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# 3) e
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# We must ensure, therefore, that the arguments are appropriately
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# quoted so that using:
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# libtool --mode=link ... $(LTLDFLAGS)
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# will result in the same number of arguments being passed to
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# libtool. In other words, when this script was invoked, the shell
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# removed one level of quoting, present in $(LDFLAGS); we have to put
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# it back.
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# Quote any embedded single quotes.
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case $arg in
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*"'"*)
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# The following command creates the script:
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# 1s,^X,,;s|'|'"'"'|g
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# which removes a leading X, and then quotes and embedded single
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# quotes.
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sed_script="1s,^X,,;s|'|'\"'\"'|g"
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# Add a leading "X" so that if $arg starts with a dash,
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# the echo command will not try to interpret the argument
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# as a command-line option.
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arg="X$arg"
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# Generate the quoted string.
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quoted_arg=`echo "$arg" | sed -e "$sed_script"`
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;;
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*)
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quoted_arg=$arg
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;;
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esac
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# Surround the entire argument with single quotes.
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quoted_arg="'"$quoted_arg"'"
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# Add it to the string.
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result="$result $quoted_arg"
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done
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# Output the string we have built up.
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echo "$result"
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