I am trying to build ntgs from the latest source, using the .spec from rpmforge - as non-root via rpmbuild. During the compile, it fails at this step:

checking for GNUTLS... no
configure: error: ntfsprogs crypto code requires the gnutls library.
error: Bad exit status from /var/tmp/rpm-tmp.78913 (%build)

However, I can compile it successfully outside of rpmbuild. So it sounds like it just the matter of library being seen during the build. However, I can confirm that rpmbuild can see the library that gnutls resides:

[foo@bar ~]$ rpmbuild -E '%{_libdir}' rpmbuild/SPECS/ntfsprogs.spec 
/usr/lib

Library location:

[foo@bar ntfs-3g_ntfsprogs-2012.1.15]$ /sbin/ldconfig -p | grep -i gnutls
        libgnutls.so.13 (libc6) => /usr/lib/libgnutls.so.13
        libgnutls.so (libc6) => /usr/lib/libgnutls.so
        libgnutls-openssl.so.13 (libc6) => /usr/lib/libgnutls-openssl.so.13
        libgnutls-openssl.so (libc6) => /usr/lib/libgnutls-openssl.so
        libgnutls-extra.so.13 (libc6) => /usr/lib/libgnutls-extra.so.13
        libgnutls-extra.so (libc6) => /usr/lib/libgnutls-extra.so

What would cause the problem of the library not being seen when you build a RPM?

EDIT: Oh yeah, I am running Centos 5.5.