SDK Issues

[Jack Mitchell <ml@communistcode.co.uk>]

I recently did a new build of my images and SDKs under master
(b188bda18690dc1af) refreshing a 3 month old build. Now everything
builds fine, but when trying to build our in house software with the
SDK, the new SDK falls over citing issues failing to link with libdl. If
I think switch back to using the old SDK, everything builds without
issue. Can anybody think of anything which might have altered the SDK in
the past few months in order to cause this to break? I have done a quick
directory diff of the 2 SDKs and nothing radically different. GCC 4.81
-> 4.82 and autotools 1.13  -> 1.14 are probably the big changes. From
what I can see the command to build the application is linking with all
the correct libraries and as it builds with previous versions I would be
surprised if this was wrong. It also seems to be struggling with the
-lcrypto libraries, but it hits the libdl issue first so it may just be
a domino effect, or there could be a significant issue with the SDK
generation.

i586-oe-linux-gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse
--sysroot=/scratch/jmitchell/oecore-sdk/1/sysroots/core2-32-oe-linux -I.
-I/scratch/jmitchell/code.git/net-snmp/../include -Wall -pipe  -rdynamic
-g -Wall -Wextra -Wl,--build-id -O2 -Wall -Wstrict-prototypes
-Wwrite-strings -Wcast-qual -Wno-char-subscripts -Dlinux -o .libs/snmpd
snmpd.o -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -rdynamic -rdynamic
 ./.libs/libucdagent.so ./.libs/libucdmibs.so -lwrap
../snmplib/.libs/libsnmp.so -lcrypto -ldl -lelf -ldl  -Wl,--rpath
-Wl,/scratch/jmitchell/code.git/net-snmp/../net-snmp/usr/lib
./.libs/libucdmibs.so: undefined reference to `dlopen'
../snmplib/.libs/libsnmp.so: undefined reference to `EVP_md5'
../snmplib/.libs/libsnmp.so: undefined reference to `EVP_sha1'
../snmplib/.libs/libsnmp.so: undefined reference to `RAND_bytes'
../snmplib/.libs/libsnmp.so: undefined reference to `EVP_DigestInit'
./.libs/libucdmibs.so: undefined reference to `dlclose'
../snmplib/.libs/libsnmp.so: undefined reference to `DES_ncbc_encrypt'
../snmplib/.libs/libsnmp.so: undefined reference to `DES_cbc_encrypt'
../snmplib/.libs/libsnmp.so: undefined reference to `EVP_DigestUpdate'
../snmplib/.libs/libsnmp.so: undefined reference to `HMAC'
../snmplib/.libs/libsnmp.so: undefined reference to `DES_key_sched'
./.libs/libucdmibs.so: undefined reference to `dlerror'
./.libs/libucdmibs.so: undefined reference to `dlsym'
../snmplib/.libs/libsnmp.so: undefined reference to `EVP_DigestFinal'

Any light shed would be much appreciated!

Cheers,

-- 
  Jack Mitchell (jack@embed.me.uk)
  Embedded Systems Engineer
  Cambridgeshire, UK
  http://www.embed.me.uk
--