While linking .SO files am getting this error. I tried clean build also, but not helped.

i have compiled libcurl and my own program both in same openwrt tool-chain(Mipsel)

[ 45%] Linking CXX shared library pp-sdk-core.so
openwrt/staging_dir/target-mipsel_1004kc+dsp_uClibc-0.9.33.2/usr/lib/libcurl.so: error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status

Thanks in advance!