Date: Sat, 03 Nov 2012 13:59:18 +0100 From: Peter Klett <peter@netkey.at> To: Freebsd Ports <freebsd-ports@freebsd.org> Subject: net-p2p/retroshare VoIP plugin: Undefined symbol Message-ID: <042f62cef98b0499e960bfe3e7f15fff@netkey.at>
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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
18:13:54.000000000 +0100
+++ plugins/VOIP/services/rsvoipitems.cc 2012-10-29
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
0000000000809580 g F .text 00000000000000c7
_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
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