[Alfonso Acosta Gómez <aacosta@xxxxxxx>]

Modifying wireshark_gen.py so that the "offending" symbols are no longer generated made the trick.

Of course, that change is not acceptable, since it would prevent idl2wrs from generating plugins.

A better (or at least acceptable) solution would consist in adding an extra flag (-p meaning "generate pluging code") to both idl2wrs and the omniidl backend.

Would you be interested in a patch?

-----Mensaje original-----
De: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] En nombre de Alfonso Acosta Gómez
Enviado el: jueves, 16 de julio de 2009 11:23
Para: wireshark-dev@xxxxxxxxxxxxx
Asunto: [Wireshark-dev] idl2wrs: "multiple definition" linker errors when building multiple idl-dissectors at once

Hi,

I am writing a script to create custom night-builds of wireshark 1.2.0 including dissectors for a set of idls.

My script follows wireshark's idl2wrs guide  [1]  and works flawlessly for a single IDL. However, building multiple idl-dissectors leads to "multiple definition" errors fro symbols `version', `plugin_register' and `plugin_reg_handoff'. (See the end of the e--mail for an error-sample)

It seems that the symbol clash is cause because idl2wrs is generating code sections like the following for _each_ dissector:

#ifndef ENABLE_STATIC
G_MODULE_EXPORT const gchar version[] = "0.0.1";
#endif

#ifndef ENABLE_STATIC

G_MODULE_EXPORT void
plugin_register(void)
{
....
}

G_MODULE_EXPORT void
plugin_reg_handoff(void){
...
}
#endif


Is idl2wrs to blame or am I doing something wrong?  In case it is, can anyone suggest a workaround?


Thanks in advance,

Alfonso Acosta


[1] http://www.wireshark.org/docs/wsug_html_chunked/AppToolsidl2wrs.html

Error example.

When generating and building the following dissectors:

packet-tkcomcorbaapplication-idl.c  packet-tkcomcorbaguiinstallation-idl.c  packet-tkcomcorbaguiloginterest-idl.c
packet-tkcomcorbagui-idl.c          packet-tkcomcorbaguiinterest-idl.c      packet-tkcomcorbaprocesslist-idl.c

I get the following building errors:

make[3]: Entering directory `/tmp/wireshark-1.2.0/epan'
/bin/sh ../libtool --tag=CC --mode=link gcc  -DINET6 -D_U_="__attribute__((unused))" -g -O2 -Wall -W -Wdeclaration-after-statement -Wendif-labels -Wpointer-arith -Wno-pointer-sign -Wcast-align -Wformat-security -I/usr/local/include -pthread -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/X11R6/include -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/opt/gnome/lib/gtk-2.0/include -I/opt/gnome/include/atk-1.0 -I/opt/gnome/include/pango-1.0 -I/opt/gnome/include/glib-2.0 -I/opt/gnome/lib/glib-2.0/include    -L/usr/local/lib -L/usr/local/lib -L/usr/local/lib -L/usr/local/lib -L/usr/local/lib -o libwireshark.la -rpath /usr/local/lib -version-info 0:1:0  libwireshark_la-addr_and_mask.lo libwireshark_la-addr_resolv.lo libwireshark_la-adler32.lo libwireshark_la-afn.lo libwireshark_la-asn1.lo libwireshark_la-atalk-utils.lo libwireshark_la-base64.lo libwireshark_la-bitswap.lo libwireshark_la-camel-persistentdata.lo libwireshark_la-charsets.lo libwireshark_la-circuit.lo libwi
 reshark_la-codecs.lo libwireshark_la-column.lo libwireshark_la-column-utils.lo libwireshark_la-conversation.lo libwireshark_la-crc10.lo libwireshark_la-crc16.lo libwireshark_la-crc32.lo libwireshark_la-crc6.lo libwireshark_la-crcdrm.lo libwireshark_la-dissector_filters.lo libwireshark_la-emem.lo libwireshark_la-epan.lo libwireshark_la-ex-opt.lo libwireshark_la-except.lo libwireshark_la-expert.lo libwireshark_la-filesystem.lo libwireshark_la-follow.lo libwireshark_la-frame_data.lo libwireshark_la-frequency-utils.lo libwireshark_la-funnel.lo libwireshark_la-gcp.lo libwireshark_la-geoip_db.lo libwireshark_la-golay.lo libwireshark_la-guid-utils.lo libwireshark_la-h225-persistentdata.lo libwireshark_la-in_cksum.lo libwireshark_la-ipproto.lo libwireshark_la-ipv4.lo libwireshark_la-next_tvb.lo libwireshark_la-nstime.lo libwireshark_la-oids.lo libwireshark_la-osi-utils.lo libwireshark_la-packet.lo libwireshark_la-plugins.lo libwireshark_la-prefs.lo libwireshark_la-proto.lo libwiresh
 ark_la-range.lo libwireshark_la-reassemble.lo libwireshark_la-reedsolomon.lo libwireshark_la-report_err.lo libwireshark_la-req_resp_hdrs.lo libwireshark_la-sigcomp_state_hdlr.lo libwireshark_la-sigcomp-udvm.lo libwireshark_la-sminmpec.lo libwireshark_la-sna-utils.lo libwireshark_la-stat_cmd_args.lo libwireshark_la-stats_tree.lo libwireshark_la-strutil.lo libwireshark_la-stream.lo libwireshark_la-t35.lo libwireshark_la-tap.lo libwireshark_la-tcap-persistentdata.lo libwireshark_la-timestamp.lo libwireshark_la-tfs.lo libwireshark_la-to_str.lo libwireshark_la-tvbparse.lo libwireshark_la-tvbuff.lo libwireshark_la-uat.lo libwireshark_la-value_string.lo libwireshark_la-xdlc.lo  libwireshark_generated.la libwireshark_asmopt.la crc/libcrc.la crypt/libairpdcap.la ftypes/libftypes.la dfilter/libdfilter.la dissectors/libdissectors.la dissectors/libdirtydissectors.la  -lgcrypt -lgpg-error ../wsutil/libwsutil.la -lm -lz
gcc -shared  .libs/libwireshark_la-addr_and_mask.o .libs/libwireshark_la-addr_resolv.o .libs/libwireshark_la-adler32.o .libs/libwireshark_la-afn.o .libs/libwireshark_la-asn1.o .libs/libwireshark_la-atalk-utils.o .libs/libwireshark_la-base64.o .libs/libwireshark_la-bitswap.o .libs/libwireshark_la-camel-persistentdata.o .libs/libwireshark_la-charsets.o .libs/libwireshark_la-circuit.o .libs/libwireshark_la-codecs.o .libs/libwireshark_la-column.o .libs/libwireshark_la-column-utils.o .libs/libwireshark_la-conversation.o .libs/libwireshark_la-crc10.o .libs/libwireshark_la-crc16.o .libs/libwireshark_la-crc32.o .libs/libwireshark_la-crc6.o .libs/libwireshark_la-crcdrm.o .libs/libwireshark_la-dissector_filters.o .libs/libwireshark_la-emem.o .libs/libwireshark_la-epan.o .libs/libwireshark_la-ex-opt.o .libs/libwireshark_la-except.o .libs/libwireshark_la-expert.o .libs/libwireshark_la-filesystem.o .libs/libwireshark_la-follow.o .libs/libwireshark_la-frame_data.o .libs/libwireshark_la-fre
 quency-utils.o .libs/libwireshark_la-funnel.o .libs/libwireshark_la-gcp.o .libs/libwireshark_la-geoip_db.o .libs/libwireshark_la-golay.o .libs/libwireshark_la-guid-utils.o .libs/libwireshark_la-h225-persistentdata.o .libs/libwireshark_la-in_cksum.o .libs/libwireshark_la-ipproto.o .libs/libwireshark_la-ipv4.o .libs/libwireshark_la-next_tvb.o .libs/libwireshark_la-nstime.o .libs/libwireshark_la-oids.o .libs/libwireshark_la-osi-utils.o .libs/libwireshark_la-packet.o .libs/libwireshark_la-plugins.o .libs/libwireshark_la-prefs.o .libs/libwireshark_la-proto.o .libs/libwireshark_la-range.o .libs/libwireshark_la-reassemble.o .libs/libwireshark_la-reedsolomon.o .libs/libwireshark_la-report_err.o .libs/libwireshark_la-req_resp_hdrs.o .libs/libwireshark_la-sigcomp_state_hdlr.o .libs/libwireshark_la-sigcomp-udvm.o .libs/libwireshark_la-sminmpec.o .libs/libwireshark_la-sna-utils.o .libs/libwireshark_la-stat_cmd_args.o .libs/libwireshark_la-stats_tree.o .libs/libwireshark_la-strutil.o .li
 bs/libwireshark_la-stream.o .libs/libwireshark_la-t35.o .libs/libwireshark_la-tap.o .libs/libwireshark_la-tcap-persistentdata.o .libs/libwireshark_la-timestamp.o .libs/libwireshark_la-tfs.o .libs/libwireshark_la-to_str.o .libs/libwireshark_la-tvbparse.o .libs/libwireshark_la-tvbuff.o .libs/libwireshark_la-uat.o .libs/libwireshark_la-value_string.o .libs/libwireshark_la-xdlc.o -Wl,--whole-archive ./.libs/libwireshark_generated.a ./.libs/libwireshark_asmopt.a crc/.libs/libcrc.a crypt/.libs/libairpdcap.a ftypes/.libs/libftypes.a dfilter/.libs/libdfilter.a dissectors/.libs/libdissectors.a dissectors/.libs/libdirtydissectors.a -Wl,--no-whole-archive  -Wl,--rpath -Wl,/tmp/wireshark-1.2.0/wsutil/.libs -L/usr/local/lib -L/opt/gnome/lib /opt/gnome/lib/libgmodule-2.0.so -ldl /opt/gnome/lib/libglib-2.0.so /usr/lib/libpcre.so /usr/lib/libgcrypt.so -L/usr/lib /usr/lib/libgpg-error.so ../wsutil/.libs/libwsutil.so -lm -lz  -pthread -Wl,-soname -Wl,libwireshark.so.0 -o .libs/libwireshark.so
 .0.0.1
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaapplication-idl.o): In function `plugin_reg_handoff':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaapplication-idl.c:512: multiple definition of `plugin_reg_handoff'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:565: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaapplication-idl.o): In function `plugin_register':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaapplication-idl.c:505: multiple definition of `plugin_register'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:558: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaapplication-idl.o): In function `proto_register_handoff_giop_tkcomcorbaapplication':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaapplication-idl.c:484: multiple definition of `version'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:537: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiloginterest-idl.o): In function `plugin_reg_handoff':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiloginterest-idl.c:434: multiple definition of `plugin_reg_handoff'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:565: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiloginterest-idl.o): In function `plugin_register':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiloginterest-idl.c:427: multiple definition of `plugin_register'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:558: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiloginterest-idl.o): In function `proto_register_handoff_giop_tkcomcorbaguiloginterest': /tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiloginterest-idl.c:406: multiple definition of `version'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:537: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaprocesslist-idl.o): In function `plugin_reg_handoff':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaprocesslist-idl.c:3516: multiple definition of `plugin_reg_handoff'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:565: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaprocesslist-idl.o): In function `plugin_register':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaprocesslist-idl.c:3509: multiple definition of `plugin_register'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:558: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaprocesslist-idl.o): In function `proto_register_handoff_giop_tkcomcorbaprocesslist':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaprocesslist-idl.c:3468: multiple definition of `version'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:537: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbagui-idl.o): In function `plugin_reg_handoff':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbagui-idl.c:434: multiple definition of `plugin_reg_handoff'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:565: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbagui-idl.o): In function `plugin_register':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbagui-idl.c:427: multiple definition of `plugin_register'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:558: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbagui-idl.o): In function `proto_register_handoff_giop_tkcomcorbagui':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbagui-idl.c:406: multiple definition of `version'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:537: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinterest-idl.o): In function `plugin_reg_handoff':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinterest-idl.c:815: multiple definition of `plugin_reg_handoff'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:565: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinterest-idl.o): In function `plugin_register':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinterest-idl.c:808: multiple definition of `plugin_register'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:558: first defined here
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinterest-idl.o): In function `proto_register_handoff_giop_tkcomcorbaguiinterest':
/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinterest-idl.c:787: multiple definition of `version'
dissectors/.libs/libdissectors.a(libdissectors_la-packet-tkcomcorbaguiinstallation-idl.o):/tmp/wireshark-1.2.0/epan/dissectors/packet-tkcomcorbaguiinstallation-idl.c:537: first defined here
collect2: ld returned 1 exit status
make[3]: *** [libwireshark.la] Error 1
make[3]: Leaving directory `/tmp/wireshark-1.2.0/epan'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/wireshark-1.2.0/epan'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/wireshark-1.2.0'
make: *** [all] Error 2
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Este mensaje, y en su caso, cualquier fichero anexo al mismo,
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 en el marco de su Sistema de Gestion de Seguridad de la 
Informacion siendo para uso exclusivo del destinatario, quedando 
prohibida su divulgacion copia o distribucion a terceros sin la 
autorizacion expresa del remitente. Si Vd. ha recibido este mensaje 
 erroneamente, se ruega lo notifique al remitente y proceda a su borrado. 
Gracias por su colaboracion.
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information, according to our Information Security Management System,
 and intended solely for a specific individual to whom they are addressed.
 Any unauthorised copy, disclosure or distribution of this message
 is strictly forbidden. If you have received this transmission in error,
 please notify the sender immediately and delete it.
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