Ed Ravin wrote:
> This is weird.  I can't build snmptrapd on my Solaris 10 x86 box - see
> below.  Had no such problems with 5.4.  netsnmphelpers.a exists
> and has the entry points defined:
> 
>   # nm 
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/helpers/.libs/libnetsnmphelpers.a
>  | grep -i register_null_context
>   [13]    |         0|     132|FUNC |GLOB |0    |2      
> |netsnmp_register_null_context
> 
> But when I build, it's as if it wasn't there:
> 
> /bin/sh ../libtool  --mode=link /usr/local/bin/gcc -g -O2 -Usolaris2 
> -Dsolaris2=solaris2 -Wall -Winline -Wstrict-prototypes -Wwrite-strings 
> -Wcast-qual -Wno-char-subscripts -o snmptrapd snmptrapd.lo  
> libnetsnmptrapd.la -L../snmplib/.libs -L../snmplib -L../agent/.libs 
> -L../agent -L../agent/helpers/.libs -L../agent/helpers -L/usr/local/ssl/lib 
> -R/usr/local/ssl/lib/  ../agent/libnetsnmpmibs.la 
> ../agent/helpers/libnetsnmphelpers.la ../agent/libnetsnmpagent.la 
> ../snmplib/libnetsnmp.la  -lelf  -lnsl -lsocket 
> /usr/local/bin/gcc -g -O2 -Usolaris2 -Dsolaris2=solaris2 -Wall -Winline 
> -Wstrict-prototypes -Wwrite-strings -Wcast-qual -Wno-char-subscripts -o 
> snmptrapd snmptrapd.o  
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs 
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/helpers/.libs 
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/snmplib/.libs 
> ./.libs/libnetsnmptrapd.a 
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpmibs.a
>  -L/usr/local/ssl/lib 
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/snmplib 
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent 
> -L/build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/helpers 
> ../agent/.libs/libnetsnmpmibs.a 
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/helpers/.libs/libnetsnmphelpers.a
>  -ladm ../agent/helpers/.libs/libnetsnmphelpers.a 
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a
>  ../agent/.libs/libnetsnmpagent.a /build/
Su
>  nOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/snmplib/.libs/libnetsnmp.a -lwrap 
> -lkvm ../snmplib/.libs/libnetsnmp.a -lkstat -lcrypto -lelf -lnsl -lsocket 
> -R/usr/local/ssl/lib/
> Undefined                       first referenced
>  symbol                             in file
> netsnmp_register_null_context       
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(agent_registry.o)
> netsnmp_register_old_api            
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(agent_registry.o)
> netsnmp_init_helpers                
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(snmp_vars.o)
> netsnmp_get_bulk_to_next_handler    
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(agent_handler.o)
> netsnmp_bulk_to_next_fix_requests   
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(master.o)
> netsnmp_register_null               
> /build/SunOS/netsnmp/net-snmp-5.4.1.pre3-SunOS-5.10/agent/.libs/libnetsnmpagent.a(agent_registry.o)
> ld: fatal: Symbol referencing errors. No output written to snmptrapd
> collect2: ld returned 1 exit status

Interesting. FWIW, this works fine for me on Solaris/Sparc 8/9/10. Not
sure why x86 treats things differently.

Can you please try whether shuffling the order of libnetsnmpagent.[l]a
and libnetsnmphelpers.[l]a around changes things here? Also, do you have
 cc available on this box? If so, does it make a difference if you build
with cc?

The problem is that these five symbols violate the dependency chain (see
http://www.net-snmp.org/wiki/index.php/Library_layering). We'd need to
merge libnetsnmpagent and libnetsnmphelpers to fix this, but feel like
this change is too significant for 5.4.x.


+Thomas

-- 
Thomas Anders (thomas.anders at blue-cable.de)

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