[CentOS] /usr/bin/ld: skipping incompatible

Garrick Staples garrick at usc.edu
Thu Mar 6 19:45:35 UTC 2008

On Thu, Mar 06, 2008 at 03:48:04PM +0100, Simon Jolle alleged:
> Hi Centos Users
> I try to compile SNMPPD (SNMP Proxy Daemon) on Centos 5.1 x86_64 with
> latest patches. Dependencies (like libsplit, net-snmp-libs,
> net-snmp-devel, net-snmp-libs) are installed, both 32 and 64 Bit.
> # rpmbuild -tb snmppd-0.5.2.tar.gz
> [...]
> Making all in snmppd
> make[2]: Entering directory `/tmp/snmppd-0.5.2/snmppd'
> gcc  -Wall -Wno-uninitialized -Wchar-subscripts -Wmissing-declarations
> -Wmissing-prototypes -Wnested-externs -Wpointer-arith
> -Wno-sign-compare -Werror  -L/usr/lib  -o snmppd  conf.o control.o
> log.o queue.o snmp.o snmppd.o threads.o utils.o -lnetsnmp  -lcrypto
> -lpthread
> /usr/bin/ld: skipping incompatible /usr/lib/libnetsnmp.so when
> searching for -lnetsnmp
> /usr/bin/ld: skipping incompatible /usr/lib/libnetsnmp.a when
> searching for -lnetsnmp
> snmppd.o: In function `new_target':
> snmppd.c:(.text+0x371): undefined reference to `split'
> snmppd.c:(.text+0x3fb): undefined reference to `split_free'
> snmppd.c:(.text+0x619): undefined reference to `split_free'
> collect2: ld returned 1 exit status
> make[2]: *** [snmppd] Error 1
> make[2]: Leaving directory `/tmp/snmppd-0.5.2/snmppd'
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory `/tmp/snmppd-0.5.2'
> make: *** [all] Error 2
> [...]
> Can anyone explain me "/usr/bin/ld: skipping incompatible" in plain
> english ;) How to solve it?

"skipping incompatible" means that ld is skipping over libraries/archives that
are the wrong architecture.  In this case, ld is skipping 32bit archives while
trying to link a 64bit binary.  This is all well and good.

You can normally ignore these messages because ld is pretty good and eventually
finding the correct libs.

Your problem is the "undefined reference" errors, not the "skipping" warnings.
It looks like ld needs a -lsplit or something.  I don't see a libsplit in my
repo so I can't comment specifically.  Make sure you have a x86_64
libsplit-devel (or whatever it is called) installed and watch the output of
snmppd's configure carefully.

Garrick Staples, GNU/Linux HPCC SysAdmin
University of Southern California

Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html
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