ecl-12.12.1-2.fc19.src is missing BuildRequires: libatomic_ops-static [...] https://fedoraproject.org/wiki/Packaging:Guidelines#Packaging_Static_Libraries_2 If a library you depend on only provides a static version your package can link against it provided that you BuildRequire the *-static subpackage. Packagers in such a situation should be aware that if a shared library becomes available, that you should adjust your package to use the shared library.
ecl-12.12.1-3.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/FEDORA-2012-19992/ecl-12.12.1-3.fc18
Package ecl-12.12.1-3.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing ecl-12.12.1-3.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-19992/ecl-12.12.1-3.fc18 then log in and leave karma (feedback).
ecl-12.12.1-3.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.