# This list of files suggests *candidates* of unnecessary compilation.  I
# don't know for sure that they aren't used after compilation, but I suspect
# so given my build.log and this rather innefficient shell/perl script combo.

$ cat get_files_of_interest.pl
#!/usr/bin/env perl

use strict;
use warnings;

while ( <STDIN> ) {  # store each input line into $_
>--if ( s/.* -o (\S+).*/$1/ ) { # if a substition made, then
>-->--# $_ was a compile line with "-o ...." in it.  i.e.
>-->--# we're looking for the object file lines

>-->--# Now, only print the line if the output of above was
>-->--# at least two directories deep.  i.e. if it at least
>-->--# has a form like dir/dir/file.so or dir/dir/file.o

>-->--# this will not match lines like "-o dir/file.o" or
>-->--# "-o file.o"
>-->--print if s|.*/(\w+/\w+/\w+\.s?o)|$1|;
>--}
}

$ for i in $(./get_files_of_interest.pl < build.log | sort -u); do
COUNT=$(\grep -c "$i" build.log)
[[ "1" == "$COUNT" ]] && find . -path "*/$i"
done | sort > unused_object_files.txt

Begin files:
========================================
./bean/unxlngx6/slo/officebean_version.o
./bridges/unxlngx6/slo/java_uno_version.o
./connectivity/unxlngx6/slo/hsqldb_version.o
./connectivity/unxlngx6/slo/mozab_dflt_version.o
./connectivity/unxlngx6/slo/mozabdrv_dflt_version.o
./desktop/unxlngx6/obj/copyright_ascii_ooo.o
./desktop/unxlngx6/obj/copyright_ascii_sun.o
./desktop/unxlngx6/slo/dp_activepackages.o
./desktop/unxlngx6/slo/dp_commandenvironments.o
./desktop/unxlngx6/slo/dp_configurationbackenddb.o
./desktop/unxlngx6/slo/dp_configuration.o
./desktop/unxlngx6/slo/dp_executablebackenddb.o
./desktop/unxlngx6/slo/dp_executable.o
./desktop/unxlngx6/slo/dp_extbackenddb.o
./desktop/unxlngx6/slo/dp_extensionmanager.o
./desktop/unxlngx6/slo/dp_informationprovider.o
./desktop/unxlngx6/slo/dp_managerfac.o
./desktop/unxlngx6/slo/dp_manager.o
./desktop/unxlngx6/slo/dp_package.o
./desktop/unxlngx6/slo/dp_properties.o
./javaunohelper/unxlngx6/slo/juh_version.o
./javaunohelper/unxlngx6/slo/juhx_version.o
./jurt/unxlngx6/slo/jpipe_version.o
./sal/unxlngx6/obj/alloc_arena.o
./sal/unxlngx6/obj/alloc_cache.o
./sal/unxlngx6/obj/alloc_fini.o
./sal/unxlngx6/obj/alloc_global.o
./sal/unxlngx6/obj/bootstrap.o
./sal/unxlngx6/obj/byteseq.o
./sal/unxlngx6/obj/cipher.o
./sal/unxlngx6/obj/cmdargs.o
./sal/unxlngx6/obj/conditn.o
./sal/unxlngx6/obj/context.o
./sal/unxlngx6/obj/convertbig5hkscs.o
./sal/unxlngx6/obj/converter.o
./sal/unxlngx6/obj/converteuctw.o
./sal/unxlngx6/obj/convertgb18030.o
./sal/unxlngx6/obj/convertiso2022cn.o
./sal/unxlngx6/obj/convertiso2022jp.o
./sal/unxlngx6/obj/convertiso2022kr.o
./sal/unxlngx6/obj/convertsinglebytetobmpunicode.o
./sal/unxlngx6/obj/crc.o
./sal/unxlngx6/obj/debugbase.o
./sal/unxlngx6/obj/diagnose.o
./sal/unxlngx6/obj/digest.o
./sal/unxlngx6/obj/file_error_transl.o
./sal/unxlngx6/obj/file_misc.o
./sal/unxlngx6/obj/file_path_helper.o
./sal/unxlngx6/obj/filepath.o
./sal/unxlngx6/obj/file_stat.o
./sal/unxlngx6/obj/file_url.o
./sal/unxlngx6/obj/file_volume.o
./sal/unxlngx6/obj/hash.o
./sal/unxlngx6/obj/interlck.o
./sal/unxlngx6/obj/loadmodulerelative.o
./sal/unxlngx6/obj/locale.o
./sal/unxlngx6/obj/logfile.o
./sal/unxlngx6/obj/math.o
./sal/unxlngx6/obj/memory.o
./sal/unxlngx6/obj/module.o
./sal/unxlngx6/obj/mutex.o
./sal/unxlngx6/obj/nlsupport.o
./sal/unxlngx6/obj/pipe.o
./sal/unxlngx6/obj/printtrace.o
./sal/unxlngx6/obj/process_impl.o
./sal/unxlngx6/obj/process.o
./sal/unxlngx6/obj/profile.o
./sal/unxlngx6/obj/random.o
./sal/unxlngx6/obj/readwrite_helper.o
./sal/unxlngx6/obj/rtl_process.o
./sal/unxlngx6/obj/salinit.o
./sal/unxlngx6/obj/security.o
./sal/unxlngx6/obj/semaphor.o
./sal/unxlngx6/obj/signal.o
./sal/unxlngx6/obj/socket.o
./sal/unxlngx6/obj/strbuf.o
./sal/unxlngx6/obj/strimp.o
./sal/unxlngx6/obj/string.o
./sal/unxlngx6/obj/system.o
./sal/unxlngx6/obj/tables.o
./sal/unxlngx6/obj/tcvtbyte.o
./sal/unxlngx6/obj/tcvtmb.o
./sal/unxlngx6/obj/tcvtutf7.o
./sal/unxlngx6/obj/tcvtutf8.o
./sal/unxlngx6/obj/tempfile.o
./sal/unxlngx6/obj/tenchelp.o
./sal/unxlngx6/obj/tencinfo.o
./sal/unxlngx6/obj/textcvt.o
./sal/unxlngx6/obj/textenc.o
./sal/unxlngx6/obj/thread.o
./sal/unxlngx6/obj/time.o
./sal/unxlngx6/obj/tres.o
./sal/unxlngx6/obj/unichars.o
./sal/unxlngx6/obj/unload.o
./sal/unxlngx6/obj/uri.o
./sal/unxlngx6/obj/ustrbuf.o
./sal/unxlngx6/obj/ustring.o
./sal/unxlngx6/obj/utility.o
./sal/unxlngx6/obj/util.o
./sal/unxlngx6/obj/uuid.o
./sal/unxlngx6/obj/uunxapi.o
./setup_native/unxlngx6/slo/ulfconv.o
./soltools/unxlngx6/obj/gen_info.o
./soltools/unxlngx6/obj/gi_list.o
./soltools/unxlngx6/obj/gi_parse.o
./soltools/unxlngx6/obj/simstr.o
./soltools/unxlngx6/obj/st_gilrw.o
./soltools/unxlngx6/slo/gen_info.o
./soltools/unxlngx6/slo/gi_list.o
./soltools/unxlngx6/slo/gi_parse.o
./soltools/unxlngx6/slo/simstr.o
./soltools/unxlngx6/slo/st_gilrw.o