Hi Neils Baggesen:
I tried the 5.7.2.rc2.
The configure options are as follows
LIBS="-lpthread" ./configure --prefix=/home/build/mnathan/netsnmp_staging
--exec-prefix=/home/build/mnathan/netsnmp_exec
--libdir=/home/build/mnathan/netsnmp_exec/lib
--with-mibdirs=/usr/dragon/.snmp/mibs:/opt/dragon/share/snmp/mibs:./../docs
--enable-ipv6 --enable-reentrant --with-default-snmp-version="3"
--with-sys-contact="dl-ids_escalat...@enterasys.com"
--with-sys-location="UnKnown" --with-logfile="/var/log/snmpd.log"
--with-persistent-directory="/var/net-snmp" --disable-embedded-perl
--disable-shared
the result is similar to 5.7.1.
libtool: link: gcc -DNETSNMP_ENABLE_IPV6 -fno-strict-aliasing -g -O2 -Uaix5
-Daix5=aix5 -o snmpd snmpd.o -Wl,-brtl ./.libs/libnetsnmpagent.a
./.libs/libnetsnmpmibs.a
/home/build/mnathan/net-snmp-5.7.2.rc2/agent/.libs/libnetsnmpagent.a
/home/build/mnathan/net-snmp-5.7.2.rc2/snmplib/.libs/libnetsnmp.a
-lperfstat ../snmplib/.libs/libnetsnmp.a -lm -lpthread
ld: 0711-317 ERROR: Undefined symbol: .CMSG_SPACE
ld: 0711-317 ERROR: Undefined symbol: .CMSG_LEN
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
information.
[he socket.h that it needs to look at to resolve the above has those
symbols require LINUX_COMPATIBILITY flag. Just wanted to mention that in
case that has a bearing on resolving this in an AIX build]
Thanks
Mukund
On Tue, Sep 4, 2012 at 9:43 AM, Nathan, Mukund <mnat...@enterasys.com>wrote:
> Hi Niels Baggesen:
> Thanks for responding.
>
> Yes, I will try 5.7.2.rc2 and update you.
>
> Regarding the availability of Symbols CMSG_SPACE and CMSG_LEN, here are
> some details.
>
> Here are my configuration options.
> LDFLAGS="-rpath=\$$ORIGIN:/usr/lib:/usr/local/lib:/lib" LIBS="-lz -lcrypto
> -lpthread" ./configure --prefix=/home/build/mnathan/netsnmp_staging
> --exec-prefix=/home/build/mnathan/netsnmp_exec
> --libdir=/home/build/mnathan/netsnmp_exec/lib
> --with-mibdirs=/usr/dragon/.snmp/mibs:/opt/dragon/share/snmp/mibs:./../docs
> --enable-ipv6 --enable-reentrant --with-default-snmp-version="3"
> --with-sys-contact="dl-ids_escalat...@enterasys.com"
> --with-sys-location="Unknown" --with-logfile="/var/log/snmpd.log"
> --with-persistent-directory="/var/net-snmp" --disable-embedded-perl
> --disable-shared
>
> The prefix and exec-prefix options above are purposely set to be in the
> user space because we have a special build area we need to manually
> populate once the libnetsnmp.so.30 gets correctly built.
>
>
> Within net-snmp the symbols are defined in
> include/net-snmp/library/snmp_transport.h
> #if defined(solaris2)
> # ifndef CMSG_SPACE
> # define CMSG_SPACE(l) \
> ((unsigned int)_CMSG_HDR_ALIGN(sizeof (struct cmsghdr) + (l)))
> # define CMSG_LEN(l) (_CMSG_HDR_ALIGN(sizeof(struct cmsghdr)) + (l))
> # endif
> #endif
> #endif /* HAVE_SYS_SOCKET_H */
>
> This is running on AIX so HAVE_SYS_SOCKET_H should be the chosen path to
> get these symbols. The platform type is aix5.
> Within my Aix, whose uname -a output is as follows,
> AIX drbld-aix 2 5 00CA5AAE4C00
> The symbols above are in /usr/include/sys/socket.h
>
> Here is the config.log output written by executing the ./configure and
> pertaining to sys/socket.h
> configure:16172: checking sys/socket.h usability
> configure:16172: gcc -c -fno-strict-aliasing -g -O2 -Uaix5 -Daix5=aix5
> conftest
> .c >&5
> configure:16172: $? = 0
> configure:16172: result: yes
> configure:16172: checking sys/socket.h presence
> configure:16172: gcc -E conftest.c
> configure:16172: $? = 0
> configure:16172: result: yes
> configure:16172: checking for sys/socket.h
> configure:16172: result: yes
>
>
> Here are the lines in /usr/include/sys/socket.h
> /*
> * CMSG_ALIGN, CMSG_SPACE, CMSG_LEN
> * Added for Linux compatibility.
> */
> #ifdef _LINUX_SOURCE_COMPAT
> #define CMSG_ALIGN _CMSG_ALIGN
> #define CMSG_SPACE(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) +
> _CMSG_ALIGN(len))
> #define CMSG_LEN(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
> #endif /* _LINUX_SOURCE_COMPAT */
>
>
> So, it seems to indicate the need for the Linux compatibility flag to be
> included in CFLAGS. One of the configure option is --oldincludedir and the
> fact that it is oldincludedir raises some concern. Even including that did
> not resolve it. I recall that when I included
> --oldincludesdir=/usr/include it resulted in undefined symbols
> for CMSG_ALIGN. I did not further try to resolve that because I was not
> sure about including the --oldincludedir option. I expected that to be
> flagged automatically by configure.
>
> Please note that the net-snmp-5.7.1/snmplib does build, but,
> net-snmp-5.7.1/agent is the one that fails this way.
>
> [ I am thinking that the agent side code does use these symbols but the
> snmplib side does not so the link time fails on the agent side. I have not
> verified that]
>
>
> Thanks
> Mukund
>
>
> On Tue, Sep 4, 2012 at 12:51 AM, Niels Baggesen <n...@users.sourceforge.net
> > wrote:
>
>> On Mon, Sep 03, 2012 at 08:20:02PM -0400, Nathan, Mukund wrote:
>> > CMSG_SPACE and CMSG_LEN are macro defined in an include file
>> >
>> > ~/net-snmp-5.7.1/include/net-snmp/library/snmp_transport.h
>> >
>> > CMSG_SPACE is defined for solaris platform and sys/socket.h is expected
>> for
>> > non solaris.
>>
>> Are the two symbols defined in any of the system include files?
>>
>> What options did you give to confidure?
>>
>> Could you please try the same with the current 5.7.2.rc2 release
>> candidate?
>>
>> /Niels
>>
>> --
>> Niels Baggesen - @home - Århus - Denmark - n...@users.sourceforge.net
>> The purpose of computing is insight, not numbers --- R W Hamming
>>
>
>
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