[Ltib] error while compiling pango-1.20 and gtk+-2.18 by ltib

[super spirit]

Hi all, i am tryng to compile gtk+-2.18 , pango-1.20.2 with cairo-1.6. the error i am getting is 
" checking if gio can sniff png... configure: error: in `/home/irode/ltib/rpm/BUILD/gtk+-2.18.7':
configure: error: cannot run test program while cross compiling. ".
i am listing part of log file, pls have a look. people can u suggest me a wht might be the problem.

thanks

=========================================================
+ cd pango-1.20.2
+ rm -rf /home/irode/ltib/tmp/pango
+ exit 0
Executing(--clean): /bin/sh -e /home/irode/ltib/tmp/rpm-tmp.19554
+ umask 022
+ cd /home/irode/ltib/rpm/BUILD
+ rm -rf pango-1.20.2
+ exit 0
Build time for pango: 101 seconds

sudo /opt/ltib/usr/bin/rpm --root /home/irode/ltib/rootfs --dbpath /var/lib/rpm -e --allmatches --nodeps --noscripts --define '_tmppath /tmp/ltib' pango 2>/dev/null
sudo /opt/ltib/usr/bin/rpm --root /home/irode/ltib/rootfs --dbpath /var/lib/rpm --prefix / --ignorearch -ivh --force --excludedocs --noscripts --define '_tmppath /tmp/ltib' /home/irode/ltib/rpm/RPMS/arm/pango-1.20.2-1.arm.rpm
Preparing...                ########################################### [100%]
   1:pango                  ########################################### [100%]

Processing: gtk2
==================
Build path taken because: directory build, no prebuilt rpm, 
scbuild/scdeploy already unpacked package

Processing: gtk2
==================
Build path taken because: directory build, build key set, no prebuilt rpm, 

rpmbuild --dbpath /home/irode/ltib/rootfs//var/lib/rpm --target arm --define '_unpackaged_files_terminate_build 0' --define '_target_cpu arm' --define '__strip strip' --define '_topdir /home/irode/ltib/rpm' --define '_prefix /usr' --define '_tmppath /home/irode/ltib/tmp' --define '_rpmdir /home/irode/ltib/rpm/RPMS'  --define '_mandir /usr/share/man' --define '_sysconfdir /etc' --define '_localstatedir /var' -bc --short-circuit  /home/irode/ltib/dist/lfs-5.1/gtk2/gtk2.spec
Building target platforms: arm
Building for target arm
Executing(%build): /bin/sh -e /home/irode/ltib/tmp/rpm-tmp.26460
+ umask 022
+ cd /home/irode/ltib/rpm/BUILD
+ cd gtk+-2.18.7
...
..
.
checking for libpng12... yes
checking pixbuf loaders to build... 
checking if gio can sniff png... configure: error: in `/home/irode/ltib/rpm/BUILD/gtk+-2.18.7':
configure: error: cannot run test program while cross compiling
See `config.log' for more details.
error: Bad exit status from /home/irode/ltib/tmp/rpm-tmp.26460 (%build)
..