## ## slo -- Separate linker options by library class ## Copyright (c) 1998-2008 Ralf S. Engelschall ## ## This file is part of shtool and 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 file 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, ## USA, or contact Ralf S. Engelschall . ## str_tool="slo" str_usage="[-p|--prefix ] -- -L -l [-L -l ...]" arg_spec="1+" opt_spec="p:" opt_alias="p:prefix" opt_p="SLO_" . ./sh.common DIFS="$IFS" # parse out -L and -l options from command line DIRS='' LIBS='' ARGV='' optprev='' for opt do # concatenate with previous option if exists if [ ".$optprev" != . ]; then opt="${optprev}${opt}"; optprev='' fi # remember options for arg if used stand-alone if [ ".$opt" = ".-L" ] || [ ".$opt" = ".-l" ]; then optprev="$opt" continue; fi # split argument into option plus option argument arg="`echo $opt | cut -c3-`" opt="`echo $opt | cut -c1-2`" # store into containers case $opt in -L) DIRS="$DIRS:$arg" ;; -l) LIBS="$LIBS:$arg" ;; *) ARGV="$ARGV $opt" ;; esac done # set linker default directories DIRS_DEFAULT='/lib:/usr/lib' if [ ".$LD_LIBRARY_PATH" != . ]; then DIRS_DEFAULT="$DIRS_DEFAULT:$LD_LIBRARY_PATH" fi # sort options by class DIRS_OBJ='' LIBS_OBJ='' DIRS_PIC='' LIBS_PIC='' DIRS_DSO='' LIBS_DSO='' # for each library... OIFS="$IFS"; IFS=':' for lib in $LIBS; do [ ".$lib" = . ] && continue found='no' found_indefdir='no' found_type='' found_dir='' # for each directory... OIFS2="$IFS"; IFS=":$DIFS" for dir in ${DIRS} switch-to-defdirs ${DIRS_DEFAULT}; do [ ".$dir" = . ] && continue [ ".$dir" = .switch-to-defdirs ] && found_indefdir=yes [ ! -d $dir ] && continue # search the file OIFS3="$IFS"; IFS="$DIFS" for file in '' `cd $dir && env -i /bin/ls lib${lib}.* 2>/dev/null`; do [ ".$file" = . ] && continue case $file in *.so|*.so.[0-9]*|*.sl|*.sl.[0-9]* ) found=yes; found_type=DSO; break ;; *.lo|*.la ) found=yes; found_type=PIC ;; *.a ) if [ ".$found_type" = . ]; then found=yes found_type=OBJ fi ;; esac done IFS="$OIFS3" if [ ".$found" = .yes ]; then found_dir="$dir" break fi done IFS="$OIFS2" if [ ".$found" = .yes ]; then if [ ".$found_indefdir" != .yes ]; then eval "dirlist=\"\${DIRS_${found_type}}:\"" case "$dirlist" in *:$found_dir:* ) ;; * ) eval "DIRS_${found_type}=\"\$DIRS_${found_type}:${found_dir}\"" ;; esac eval "LIBS_${found_type}=\"\$LIBS_${found_type}:$lib\"" else eval "LIBS_${found_type}=\"\$LIBS_${found_type}:$lib\"" fi else LIBS_OBJ="$LIBS_OBJ:$lib" #dirlist="`echo $DIRS $DIRS_DEFAULT | sed -e 's/:/ /g'`" #echo "slo:Warning: library \"$lib\" not found in any of the following dirs:" 2>&1 #echo "slo:Warning: $dirlist" 1>&1 fi done IFS="$OIFS" # also pass-through unused dirs even if it's useless OIFS="$IFS"; IFS=':' for dir in $DIRS; do dirlist="${DIRS_OBJ}:${DIRS_PIC}:${DIRS_DSO}:" case "$dirlist" in *:$dir:* ) ;; * ) DIRS_OBJ="$DIRS_OBJ:$dir" ;; esac done IFS="$OIFS" # reassemble the options but separated by type for type in OBJ PIC DSO; do OIFS="$IFS"; IFS=':' eval "libs=\"\$LIBS_${type}\"" opts='' for lib in $libs; do [ ".$lib" = . ] && continue opts="$opts -l$lib" done eval "LIBS_${type}=\"$opts\"" eval "dirs=\"\$DIRS_${type}\"" opts='' for dir in $dirs; do [ ".$dir" = . ] && continue opts="$opts -L$dir" done eval "DIRS_${type}=\"$opts\"" IFS="$OIFS" done # give back results for var in ARGV DIRS_OBJ LIBS_OBJ DIRS_PIC LIBS_PIC DIRS_DSO LIBS_DSO; do eval "val=\"\$${var}\"" val="`echo $val | sed -e 's/^ *//'`" echo "${opt_p}${var}=\"${val}\"" done shtool_exit 0 ## ## manual page ## =pod =head1 NAME B - B separate linker options by library class =head1 SYNOPSIS B [B<-p>|B<--prefix> I] -- B<-L>I B<-l>I [B<-L>I B<-l>I ...] =head1 DESCRIPTION This command separates the linker options ``B<-L>'' and ``B<-l>'' by library class. It's argument line can actually be an arbitrary command line where those options are contained. B parses these two options only and ignores the remaining contents. The result is a trivial shell script on C which defines six variables containing the ``B<-L>'' and ``B<-l>'' options sorted by class: ``C'' and ``C'' contains the ``B<-L>'' and ``B<-l>'' options of static libraries, ``C'' and ``C'' contains the ``B<-L>'' and ``B<-l>'' options of static libraries containing PIC ("Position Independent Code") and ``C'' and ``C'' contains the ``B<-L>'' and ``B<-l>'' options of shared libraries. The B<-p> option can be used to change the default variable prefix from "C" to I. The intent of this separation is to provide a way between static and shared libraries which is important if one wants to link custom DSOs against libraries, because not all platforms all one to link these DSOs against shared libraries. So one first has to separate out the shared libraries and link the DSO only against the static libraries. One can use this command also to just sort the options. =head1 OPTIONS The following command line options are available. =over 4 =item B<-p>, B<--prefix> I FIXME =item B<-L>I Directory where libraries are searched in. =item B<-l>I Library to search for. =back =head1 EXAMPLE # configure.in LINK_STD="$LDFLAGS $LIBS" eval `shtool slo $LINK_STD` LINK_DSO="$SLO_DIRS_OBJ $SLO_LIBS_OBJ $SLO_DIRS_PIC $SLO_LIBS_PIC" : =head1 HISTORY The B B command was originally written by Ralf S. Engelschall Erse@engelschall.comE in 1998 for B. It was later taken over into B. =head1 SEE ALSO shtool(1), ld(1). =cut