Solution for the error "multiple definition of <function>"

Hi,

When I am trying to compile the snmpusm.c file in linux device I am facing
the following error. Kindly help me out.

$ gcc snmpusm.c -o snmpusm -I/home/me_user/net-snmp-5.3.1/include -lnetsnmp
-lcrypto -lm
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0x80):
multiple definition of `usmAES128PrivProtocol'
/tmp/ccTiH0Iv.o(.data+0x188): first defined here
/usr/bin/ld: Warning: size of symbol `usmAES128PrivProtocol' changed from 4
in /tmp/ccTiH0Iv.o to 40 in
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0xc0):
multiple definition of `usmDESPrivProtocol'
/tmp/ccTiH0Iv.o(.data+0x120): first defined here
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0x100):
multiple definition of `usmNoPrivProtocol'
/tmp/ccTiH0Iv.o(.data+0xe0): first defined here
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0x140):
multiple definition of `usmHMACSHA1AuthProtocol'
/tmp/ccTiH0Iv.o(.data+0xa0): first defined here
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0x180):
multiple definition of `usmHMACMD5AuthProtocol'
/tmp/ccTiH0Iv.o(.data+0x60): first defined here
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.data+0x1c0):
multiple definition of `usmNoAuthProtocol'
/tmp/ccTiH0Iv.o(.data+0x20): first defined here
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)(.text+0x0):
In function `usm_malloc_usmStateReference':
: multiple definition of `usm_malloc_usmStateReference'
/tmp/ccTiH0Iv.o(.text+0x0): first defined here
/usr/bin/ld: Warning: size of symbol `usm_malloc_usmStateReference' changed
from 29 in /tmp/ccTiH0Iv.o to 44 in
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../libnetsnmp.a(snmpusm.o)
/usr/lib/gcc/i386-redhat-linux/3.4.2/../../../crt1.o(.text+0x18): In
function `_start':
: undefined reference to `main'
collect2: ld returned 1 exit status


-- 
Regards & Thanks,
nagalav

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