Hi,
I am preparing my custom shared library (.so) file by including APIs of other static library (net-snmp library).

Here my problem:
My custom shared library is compiling with/without library (net-snmp library) linking.
But at the time of execution, failed to load my custom library and giving undefined "syslog_handler" symbol error in both cases. (This symbol is existed in net-snmp static library).

Please help me to find out the reason for compiling without linking any library & to find out the reason for loading problem even though after static library link.

-regards
Nagendra Rednam

When you link the shared object, use this linker option: -Wl,--no-undefined

If you have a non-working executable, try to examine the problem with commands like these:

Thanks for Reply.

After adding "-Wl,--no-undefined" option at shared library compilation by linking with static lib (net-snmp lib), I am getting "libnetsnmptrapd.a(snmptrapd_handlers.o): relocation R_X86_64_32S against `a local symbol' can not be used when making a shared object; recompile with -fPIC libnetsnmptrapd.a: could not read symbols: Bad value" error message.Even though we built the static libraries (net-snmp lib) on 64bit machine only.

If we did same thing(netsnmp static library link t executeble) for a executable it successfully linked (and running) but failed to link (net-snmp static lib) for shared-library.

My machine is 64 bit Linux machine .

Please help me to solve this problem.

-regards
Nagendra Rednam

Reason for same problem is explained in following link
http://stackoverflow.com/questions/1...-linking-error



-regards
Nagendra Rednam

Following gives the resolution:
http://www.linuxquestions.org/questi...ls-4175517572/

-regards
Nagendra Rednam

> libnetsnmptrapd.a(snmptrapd_handlers.o): relocation R_X86_64_32S against `a local symbol' can not be used when making a shared object; recompile with -fPIC libnetsnmptrapd.a

Very true, shared lib can only be built from relocatable objects (-fPIC flag at compilation)

PS: The is a special program called libtool especially for handling shared (and static) libraries.