From: gvaughan AT oranda DOT demon DOT co DOT uk (Gary V. Vaughan) Subject: ANNOUNCE: cygwin `ldd' script 11 Dec 1998 02:58:10 -0800 Message-ID: <366FF20A.65BB0922.cygnus.gnu-win32@oranda.demon.co.uk> References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------33CE9EA05AF2CC2D353AA745" To: Mumit Khan Cc: gnu-win32 AT cygnus DOT com This is a multi-part message in MIME format. --------------33CE9EA05AF2CC2D353AA745 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Attached is an all singing, all dancing ldd-a-like for cygwin. Do with it what you will, perhaps add it to the ftp.franken.de repository? I might convert some more of the functionality from cygcheck in a few weeks, once I have libtool fixed to build dlls. Thanks again Mumit for the response: Mumit Khan wrote: > > On Wed, 9 Dec 1998, Gary V. Vaughan wrote: > > > Ahh.. I didn't know dll's could depend on one another. Are these > > dependencies encoded into the dependee by cygwin's ld at linktime? > > It's the same as on other Unix systems, where shared libraries can > have dependencies as well (the win32 dll architecture is of various > quite different from the various flavors of Unix shlibs, but it's the > same basic idea). I see. It appears (by experiment!) that the final link of win32 dll does indeed list the other link-time dlls in the .idata section of the resulting library. Dll's are less brain-damaged than I had thought after all =)O| > Few comments > > - absolute pathname may not work as is (eg., ``ldd /bin/sh.exe'') You're right. Fixed in the attached version. > - You do need to sort out duplicates Right again. I fixed this too. > - the path search is confusing. for example, let's say I have a file > called foo.exe in my current working directory (which is not in my > path), and a file called foo.exe in my PATH. Now if I do: > > $ ldd foo.exe > > it picks up the one in the PATH instead of the one in the current > directory! I think this is how it should work. In the circumstance you describe above, if I typed `foo.exe' to my bash prompt, I would expect the foo.exe found in my $PATH to run. I have changed the dll lookup (after an exe is found) to look in the executables directory, the current working directory and then to search the PATH. Despite what I said about choosing an executable file to run, I assume the win32 runtime loader will search for dlls as you describe, regardless of the shell being used. > Hope I read the algorithm correctly -- don't have a windows > machine to test it out. Yup, fine. It is a little clearer in the new version I hope =)O| > You *may* need to extend the search path to include the default > search path for win32 DLLs (different for win9x and NT), including > the directory containing executable as well as the current working > directory. How do I find what these are? I have /WINNT/System32 and /WINNT put in my path by either bash or the NT kernel... are these the directories you mean? > Regards, > Mumit Many thanks for taking the time to look at this. I hope to roll this (and the rest of the required bits) into CVS libtool in the next week or two -- with luck libtool-1.3 should be able to build dll's when it is released [RSN =)O|] Cheers, Gary. --------------33CE9EA05AF2CC2D353AA745 Content-Type: text/plain; charset=us-ascii; name="ldd" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="ldd" #! /bin/sh # -*- Mode: Sh -*- # ---------------------------------------------------------------------- # ldd --- an unix ldd(1) work-alike for cygwin # # Author: Gary V. Vaughan # Maintainer: Gary V. Vaughan # Created: Tue Dec 8 08:43:00 1998 # Last Modified: Thu Dec 10 16:04:34 1998 # by: Gary V. Vaughan # # ---------------------------------------------------------------------- # @(#) $Id: ldd,v 1.2 1998/12/10 16:07:04 garyv Exp $ # ---------------------------------------------------------------------- # Copyright (C) 1998 Gary V. Vaughan # This program 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; see the file COPYING. If not, write to # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, # Boston, MA 02111-1307, USA. # Code: while test $# -gt 0; do case "$1" in --v | --ve | --ver | --vers | --versi | --versio | --version) echo 'ldd (libtool) 0.9' echo "Copyright (C) 1998 Gary V. Vaughan This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." exit 0 ;; --h | --he | --hel | --help) echo "ldd [OPTION]... FILE --help print this help and exit --version print version information and exit Report bugs to ." exit 0 ;; --) # Stop option processing. shift; break ;; -*) echo >&2 'ldd:' "unrecognized option" "\`$1'" echo exit 1 ;; *) break ;; esac done if test $# != 1; then echo >&2 'ldd:' "missing file arguments" echo >&2 "Try \`ldd --help' for more information." exit 1 fi LDDPATH=${LDDPATH=$PATH} OBJDUMP=${OBJDUMP=objdump} OBJDUMP_FLAGS=${OBJDUMP_FLAGS='-p -j idata'} to_lower="tr 'A-Z' 'a-z'" # convert to lower case basename="sed s,^.*[/\\\\],,g" # extract the basename from a path dirname="sed s,[/\\\\][^/\\\\]*\$,," # extract the dirname from a path # Sed substitution that helps us do robust quoting. It backslashifies # metacharacters that are still active within double-quoted strings. sed_quote_subst='s,\([\\"\\`$\\\\]\),\\\1,g' RE_dll='^ DLL Name: ' exts="exe dll" # valid extensions seen="" # list of objects examined already object=$1 # the object from the command line case "$object" in /* | [A-Z]:* ) path=$object ;; */* | *\\* ) dir=`echo "$object"|$dirname` path=`cd $dir && pwd``echo "$object"|$basename` ;; * ) path="" ;; esac objects=`echo "$object"|$basename|$to_lower` # In a vain attempt to squeeze a bit of speed out of the main loop # we try to remove any invalid directories or duplicates from the path... #LDDPATH=`echo "$LDDPATH"| $to_lower` lddpath="" IFS="${IFS= }"; save_ifs="$IFS"; IFS=':' for dir in $LDDPATH; do IFS="$save_ifs" lower_dir=`echo "$dir"|$to_lower` if test -z `echo ":$lddpath:" | $to_lower | grep ":$lower_dir:"`; then test -d "$dir" && lddpath="$lddpath:$dir" fi done LDDPATH=`echo "$lddpath"|sed 's,^:,,'` # MAIN LOOP: ############ while test -n "$objects" do newobjects="" for object in $objects; do # if we have no dir for object, search the LDDPATH for it if test -z "$path"; then IFS="${IFS= }"; save_ifs="$IFS"; IFS=':' for dir in $LDDPATH; do IFS="$save_ifs" for ext in $exts; do if test -f "$dir/$object.$ext"; then object="$object.$ext" path="$dir/$object" break fi done if test -z "$path" && test -f "$dir/$object"; then path="$dir/$object" fi # stop searching if we have a match test -z "$path" || break done else # we have a path, so just check for extensions dir=`echo "$path"|$dirname` for ext in $exts; do if test -f "$dir/$object.$ext"; then object="$object.$ext" path="$dir/$object" break fi done fi test -n "$path" || path="not found" # show what we have so far echo "$object -> $path" # start the next search if OBJECT was not found test -f "$path" || continue case $object in *.exe) # ...being (a bit) careful not to introduce duplicates LDDPATH="$dir:.:"`echo $LDDPATH|sed -e "s,:$dir,,;s,:\.,,"` ;; esac # escape any shell meta characters for the eval below path=`echo $path|sed -e "$sed_quote_subst"` # extract dependencies from current object new=`eval ${OBJDUMP} ${OBJDUMP_FLAGS} "$path" \ | grep "$RE_dll" | sed "s,$RE_dll,," | $to_lower` newobjects="$new $newobjects" seen="$seen $object" path="" # only add NEWOBJECTS that we have not seen yet new="" for pending in $newobjects; do test -z "`echo \" $seen \" | grep \" $pending \"`" && new="$new $pending" done newobjects=$new done # maintain the loop invariants objects="$newobjects" done exit 0 # ldd ends here --------------33CE9EA05AF2CC2D353AA745-- - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request AT cygnus DOT com" with one line of text: "help".