Please help - how do I fix this problem?

Trying to compile afni for our recently updated linux workstation. Fedora Core 17, 64-bit.

I am using Makefile.linux_gcc33_64

error:
---
/usr/bin/gcc -O2 -m64 -fPIC -DREAD_WRITE_64 -DLINUX2 -Wcomment -Wformat -DUSE_TRACING -DHAVE_XDBE -c gifti_choice.c -Igifti -I. -I/usr/X11R6/include -Inifti/niftilib -Inifti/nifticdf -Inifti/znzlib -I3DEdge/src -Irickr -DHAVE_ZLIB -DHAVE_GIFTI
In file included from gifti/gifti_io.c:5:0,
from gifti_choice.c:17:
gifti/gifti_io.h:5:19: fatal error: expat.h: No such file or directory
compilation terminated.
make: *** [gifti_choice.o] Error 1
---
======
expat.h is part of xulrunner. I have xulrunner and xulrunner-devel both installed. Along with all their numerous dependencies

xulrunner-13.0-1.fc17.x86_64
xulrunner-devel-13.0-1.fc17.x86_64
=======
[root@bigfoot xulrunner-2]# ls -l exp*
-rw-r--r--. 1 root root 7369 Jun 1 07:04 expat_config.h
-rw-r--r--. 1 root root 3447 Jun 1 07:04 expat_external.h
-rw-r--r--. 1 root root 40487 Jun 1 07:04 expat.h
[root@bigfoot xulrunner-2]# pwd
/usr/include/xulrunner-2
=======

[root@bigfoot xulrunner-2]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.7.0/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --disable-build-with-cxx --disable-build-poststage1-with-cxx --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.7.0 20120507 (Red Hat 4.7.0-5) (GCC)

Please help!

JP