net-p2p/retroshare VoIP plugin: Undefined symbol
Hi All, I'm currently trying to get the VoIP plugin from RetroShare to work under FreeBSD. After this patch I was able to build it: --- plugins/VOIP/services/rsvoipitems.cc~ 2012-02-26 18:13:54.0 +0100 +++ plugins/VOIP/services/rsvoipitems.cc2012-10-29 12:53:56.650925587 +0100 @@ -182,7 +182,7 @@ ok = setRawUInt32(data, tlvsize, offset, flags); ok = setRawUInt32(data, tlvsize, offset, data_size); std::cerr data_size : data_size std::endl; -memcpy(data+offset,voip_data,data_size) ; +memcpy(((uint8_t*)data)[offset],voip_data,data_size) ; offset += data_size ; if (offset != tlvsize) But I can't get RetroShare to load it: Cannot open plugin: /home/user/.retroshare/extensions/libVOIP.so: Undefined symbol _ZN9p3Service7receiveEP9RsRawItem Now the symbol is part of the RetroShare binary: $ grep _ZN9p3Service7receiveEP9RsRawItem work/trunk/retroshare-gui/src/RetroShare Binary file work/trunk/retroshare-gui/src/RetroShare matches but somehow the symbols from the main binary do not get exported to the plugin. The FreeBSD man page for dlopen(3) states in the NOTES section ELF executables need to be linked using the -export-dynamic option to ld(1) for symbols defined in the executable to become visible to dlsym(). So I rebuilt RetroShare with the -export-dynamic option, and the symbol is part of the symbol table: $ objdump -t work/trunk/retroshare-gui/src/RetroShare | grep _ZN9p3Service7receiveEP9RsRawItem 00809580 g F .text 00c7 _ZN9p3Service7receiveEP9RsRawItem but still to no avail (same undefined symbol error). My knowledge of ELF binaries is pretty sparse, so if someone has more clues, I would appreciate sharing :) Thanks Peter ___ freebsd-ports@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ports To unsubscribe, send any mail to freebsd-ports-unsubscr...@freebsd.org
Re: net-p2p/retroshare VoIP plugin: Undefined symbol
On Sat, Nov 03, 2012 at 01:59:18PM +0100, Peter Klett wrote: Hi All, I'm currently trying to get the VoIP plugin from RetroShare to work under FreeBSD. After this patch I was able to build it: --- plugins/VOIP/services/rsvoipitems.cc~ 2012-02-26 18:13:54.0 +0100 +++ plugins/VOIP/services/rsvoipitems.cc2012-10-29 12:53:56.650925587 +0100 @@ -182,7 +182,7 @@ ok = setRawUInt32(data, tlvsize, offset, flags); ok = setRawUInt32(data, tlvsize, offset, data_size); std::cerr data_size : data_size std::endl; -memcpy(data+offset,voip_data,data_size) ; +memcpy(((uint8_t*)data)[offset],voip_data,data_size) ; offset += data_size ; if (offset != tlvsize) But I can't get RetroShare to load it: Cannot open plugin: /home/user/.retroshare/extensions/libVOIP.so: Undefined symbol _ZN9p3Service7receiveEP9RsRawItem Now the symbol is part of the RetroShare binary: $ grep _ZN9p3Service7receiveEP9RsRawItem work/trunk/retroshare-gui/src/RetroShare Binary file work/trunk/retroshare-gui/src/RetroShare matches but somehow the symbols from the main binary do not get exported to the plugin. The FreeBSD man page for dlopen(3) states in the NOTES section ELF executables need to be linked using the -export-dynamic option to ld(1) for symbols defined in the executable to become visible to dlsym(). So I rebuilt RetroShare with the -export-dynamic option, and the symbol is part of the symbol table: $ objdump -t work/trunk/retroshare-gui/src/RetroShare | grep _ZN9p3Service7receiveEP9RsRawItem 00809580 g F .text 00c7 _ZN9p3Service7receiveEP9RsRawItem but still to no avail (same undefined symbol error). My knowledge of ELF binaries is pretty sparse, so if someone has more clues, I would appreciate sharing :) The objdump -t dumps wrong table. You want to examine the output of -T AKA --dynamic-syms. pgpPoCweZVYHj.pgp Description: PGP signature
Re: net-p2p/retroshare VoIP plugin: Undefined symbol
Perfect, that clue just did it, turns out RetroShare uses g++ for linking which has a slightly different parameter -rdynamic instead of -export-dynamic. Setting this option while linking the RetroShare binary brings the symbol in the dynamic exported table and lets the binary finally load the plugin. Thanks Konstantin for your input. Am 2012-11-03 15:53, schrieb Konstantin Belousov: On Sat, Nov 03, 2012 at 01:59:18PM +0100, Peter Klett wrote: Hi All, I'm currently trying to get the VoIP plugin from RetroShare to work under FreeBSD. After this patch I was able to build it: --- plugins/VOIP/services/rsvoipitems.cc~ 2012-02-26 18:13:54.0 +0100 +++ plugins/VOIP/services/rsvoipitems.cc2012-10-29 12:53:56.650925587 +0100 @@ -182,7 +182,7 @@ ok = setRawUInt32(data, tlvsize, offset, flags); ok = setRawUInt32(data, tlvsize, offset, data_size); std::cerr data_size : data_size std::endl; -memcpy(data+offset,voip_data,data_size) ; +memcpy(((uint8_t*)data)[offset],voip_data,data_size) ; offset += data_size ; if (offset != tlvsize) But I can't get RetroShare to load it: Cannot open plugin: /home/user/.retroshare/extensions/libVOIP.so: Undefined symbol _ZN9p3Service7receiveEP9RsRawItem Now the symbol is part of the RetroShare binary: $ grep _ZN9p3Service7receiveEP9RsRawItem work/trunk/retroshare-gui/src/RetroShare Binary file work/trunk/retroshare-gui/src/RetroShare matches but somehow the symbols from the main binary do not get exported to the plugin. The FreeBSD man page for dlopen(3) states in the NOTES section ELF executables need to be linked using the -export-dynamic option to ld(1) for symbols defined in the executable to become visible to dlsym(). So I rebuilt RetroShare with the -export-dynamic option, and the symbol is part of the symbol table: $ objdump -t work/trunk/retroshare-gui/src/RetroShare | grep _ZN9p3Service7receiveEP9RsRawItem 00809580 g F .text 00c7 _ZN9p3Service7receiveEP9RsRawItem but still to no avail (same undefined symbol error). My knowledge of ELF binaries is pretty sparse, so if someone has more clues, I would appreciate sharing :) The objdump -t dumps wrong table. You want to examine the output of -T AKA --dynamic-syms. -- netkey information technology gmbh amalienstrasse 68/6 | a-1130 vienna | austria t +43 1 888 49 93 -21 | f dw -25 e pe...@netkey.at | i www.netkey.at ___ freebsd-ports@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ports To unsubscribe, send any mail to freebsd-ports-unsubscr...@freebsd.org
