#! /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=
prev_arg=
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.
case $prev_arg in
-Xpreprocessor|-Xcompiler|-Xlinker)
# This option is already prefixed; don't prefix it again.
;;
*)
result="$result -Xcompiler"
;;
esac
;;
*)
# We do not want to add -Xcompiler to other options because
# that would prevent libtool itself from recognizing them.
;;
esac
prev_arg=$arg
# 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"
