3.5.2-10ubuntu1 build i386 failed because of missing pkg-config

[Hanmac]

Binary package hint: eclipse

     [exec] Building file: gnomeproxy.o
     [exec] gcc -I/usr/include/gconf/2/ -I/usr/include/orbit-2.0/ -I/usr/include/glib-2.0/ -I/usr/lib/glib-2.0/include/ -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -O0 -fPIC -g3 -Wall -c -fmessage-length=0 -m32 -o gnomeproxy.o ../gnomeproxy.c
     [exec] /usr/include/glib-2.0/glib/gtypes.h:34:24: fatal error: glibconfig.h: No such file or directory
it failed because the pkg-config for glib is missing in the gnomeproxy .. but i does not know why it work on amd64