I used :
#-------------------------------
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

./configure	 --disable-static \
  CC="gcc -m32" CXX="g++ -m32" \
  --build=x86_64-pc-linux-gnu \
  --host=i686-pc-linux-gnu 

make -O -j4
#------------------------------
And I have:
#------------------------------
+ make -O -j4
  CC       src/libwayland_util_la-wayland-util.lo
  CCLD     libwayland-util.la
  CC       src/wayland_scanner-scanner.o
  CCLD     wayland-scanner
  GEN      protocol/wayland-protocol.c
./wayland-scanner: error while loading shared libraries: libexpat.so.1: cannot open shared object file: No such file or directory
Makefile:2492: command object 'protocol/wayland-protocol.c' nie powiodły się
make: *** [protocol/wayland-protocol.c] Błąd 127
make: *** Waiting for unfinished jobs....
  GEN      protocol/wayland-server-protocol.h
./wayland-scanner: error while loading shared libraries: libexpat.so.1: cannot open shared object file: No such file or directory
#-------------------------------

#-----------------
$ rpm -ql libexpat1
/usr/local/lib/libexpat.so.1
/usr/local/lib/libexpat.so.1.6.0
#-----------------

#---------
$ rpm -ql libexpat1-devel | grep .pc
/usr/local/lib/pkgconfig/expat.pc
#---------

#----------------------
$ cat /usr/local/lib/pkgconfig/expat.pc
prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: expat
Version: 2.1.0
Description: expat XML parser
URL: http://www.libexpat.org
Libs: -L${libdir} -lexpat
Cflags: -I${includedir}
#----------------------