1: #! /bin/sh
    2: 
    3: # Script to translate LDFLAGS into a form suitable for use with libtool.
    4: 
    5: # Copyright (C) 2005 Free Software Foundation, Inc.
    6: #
    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.
   11: # 
   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.
   16: # 
   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. 
   21: 
   22: # Contributed by CodeSourcery, LLC.
   23: 
   24: # This script is designed to be used from a Makefile that uses libtool
   25: # to build libraries as follows: 
   26: #
   27: #   LTLDFLAGS = $(shell libtool-ldflags $(LDFLAGS))
   28: #
   29: # Then, use (LTLDFLAGS) in place of $(LDFLAGS) in your link line.
   30: 
   31: # The output of the script.  This string is built up as we process the
   32: # arguments.
   33: result=
   34: 
   35: for arg
   36: do
   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" 
   47:             ;;
   48:         *)
   49:             # We do not want to add -Xcompiler to other options because
   50:             # that would prevent libtool itself from recognizing them.
   51:             ;;
   52:     esac
   53: 
   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.
   69: 
   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"`
   84:             ;;
   85:         *)
   86:             quoted_arg=$arg
   87:             ;;
   88:     esac
   89:     # Surround the entire argument with single quotes.
   90:     quoted_arg="'"$quoted_arg"'" 
   91: 
   92:     # Add it to the string.
   93:     result="$result $quoted_arg"
   94: done
   95: 
   96: # Output the string we have built up.
   97: echo "$result"