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 prev_arg= 35 36 for arg 37 do 38 case $arg in 39 -f*|--*) 40 # Libtool does not ascribe any special meaning options 41 # that begin with -f or with a double-dash. So, it will 42 # think these options are linker options, and prefix them 43 # with "-Wl,". Then, the compiler driver will ignore the 44 # options. So, we prefix these options with -Xcompiler to 45 # make clear to libtool that they are in fact compiler 46 # options. 47 case $prev_arg in 48 -Xpreprocessor|-Xcompiler|-Xlinker) 49 # This option is already prefixed; don't prefix it again. 50 ;; 51 *) 52 result="$result -Xcompiler" 53 ;; 54 esac 55 ;; 56 *) 57 # We do not want to add -Xcompiler to other options because 58 # that would prevent libtool itself from recognizing them. 59 ;; 60 esac 61 prev_arg=$arg 62 63 # If $(LDFLAGS) is (say): 64 # a "b'c d" e 65 # then the user expects that: 66 # $(LD) $(LDFLAGS) 67 # will pass three arguments to $(LD): 68 # 1) a 69 # 2) b'c d 70 # 3) e 71 # We must ensure, therefore, that the arguments are appropriately 72 # quoted so that using: 73 # libtool --mode=link ... $(LTLDFLAGS) 74 # will result in the same number of arguments being passed to 75 # libtool. In other words, when this script was invoked, the shell 76 # removed one level of quoting, present in $(LDFLAGS); we have to put 77 # it back. 78 79 # Quote any embedded single quotes. 80 case $arg in 81 *"'"*) 82 # The following command creates the script: 83 # 1s,^X,,;s|'|'"'"'|g 84 # which removes a leading X, and then quotes and embedded single 85 # quotes. 86 sed_script="1s,^X,,;s|'|'\"'\"'|g" 87 # Add a leading "X" so that if $arg starts with a dash, 88 # the echo command will not try to interpret the argument 89 # as a command-line option. 90 arg="X$arg" 91 # Generate the quoted string. 92 quoted_arg=`echo "$arg" | sed -e "$sed_script"` 93 ;; 94 *) 95 quoted_arg=$arg 96 ;; 97 esac 98 # Surround the entire argument with single quotes. 99 quoted_arg="'"$quoted_arg"'" 100 101 # Add it to the string. 102 result="$result $quoted_arg" 103 done 104 105 # Output the string we have built up. 106 echo "$result" 107
