[AGENT++] Segmentation fault when trying to use no threads

[JAMES Robin]

We have tried to use the no threads mode in snmp++ and agent++. To do this we uncommented the defining of _NO_THREADS in agent++.h and config_snmp_pp.h and re-compiled everything. When the subagent runs it causes a segmentation fault. The back trace is:
 
#0  0x00263b2a in _int_malloc () from /lib/tls/libc.so.6
#1  0x00262e7d in malloc () from /lib/tls/libc.so.6
#2  0x0019f40e in operator new () from /usr/lib/libstdc++.so.5
#3  0x0019f55f in operator new[] () from /usr/lib/libstdc++.so.5
#4  0x007cfccf in Oid (this=0x88bd984, oid=@0xbfff81f0 <mailto:oid=@0xbfff81f0> ) at oid.cpp:136
#5  0x006929db in Oidx (this=0x88bd984, _ctor_arg=@0xbfff81f0 <mailto:_ctor_arg=@0xbfff81f0> ) at mib_entry.h:202
#6  0x00699026 in MibEntry (this=0x88bd938, o=@0xbfff81f0 <mailto:o=@0xbfff81f0> , a=NOACCESS) at mib_entry.cpp:128
#7  0x006d5b08 in MibGroup (this=0x88bd938, o=@0xbfff81f0 <mailto:o=@0xbfff81f0> , p=@0xbfff8210 <mailto:p=@0xbfff8210> ) at mib_context.cpp:110
#8  0x0805ed10 in graphics_mib (this=0x88bd938) at graphics_mib_agent.C:817
#9  0x080539d5 in main (argc=2, argv=0xbfff8314) at gphs_mib.C:104

 
The code is failing at line 817 in the following code extract:
 
814 // Group
815 graphics_mib::graphics_mib():
816    MibGroup("1.3.6.1.4.1.1254.1.1.11", "graphics_mib")
817 {
818  //--AgentGen BEGIN=graphics_mib::graphics_mib
819  //--AgentGen END
820  add(new graphics_mib_gphAttributeChangeCount());
821  add(new graphics_mib_gphServerType());
822  add(new graphics_mib_gphServerState());
823  add(new graphics_mib_gphGraphicsState());
824  add(new graphics_mib_gphPointerState());
825  add(new graphics_mib_gphKeyboardState());
826  add(new graphics_mib_decGraphicsCardType());
827  add(new graphics_mib_decPointerType());
828  add(new graphics_mib_decKeyboardType());
829  add(new graphics_mib_sonyDdmMajorSystemState());
830  add(new graphics_mib_sonyDdmM1BoardState());
831  add(new graphics_mib_sonyDdmDacState());
832  add(new graphics_mib_sonyDdmDfgState());
833  //--AgentGen BEGIN=graphics_mib::graphics_mib:post
834  //--AgentGen END
835 }

 
We also tried to use the no threads mode by defining _NO_THREADS in Makefile.linux but then had undefined references when linking the subagent:
 
gphs_mib.o: In function `Agentpp::Thread::clone()':
agent++/include/agent_pp/List.h:282: undefined reference to `Agentpp::Thread::get_runnable()'
gphs_mib.o:agent++/include/agent_pp/List.h:169: undefined reference to `Agentpp::Thread::Thread(Agentpp::Runnable&)'
gphs_mib.o: In function `Agentpp::TaskManager::clone()':
agent++/include/agent_pp/List.h:1077: undefined reference to `Agentpp::ThreadPool::ThreadPool(int, int)'
gphs_mib.o:agent++/include/agent_pp/List.h:485: undefined reference to `Agentpp::TaskManager::TaskManager(Agentpp::ThreadPool*, int)'

 
When compiled without defining _NO_THREADS the program works. What settings should be we be using to remove thread support?
 
Regards
Robin James
 

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