Disable LTO on s390x for now

cyrus-imapd.spec

@@ -9,7 +9,7 @@
 
 Name: cyrus-imapd
 Version: 3.0.13
-Release: 11%{?dist}
+Release: 12%{?dist}
 
 %define ssl_pem_file_prefix /etc/pki/%name/%name
 
@@ -302,6 +302,11 @@ sed -i \
 
 
 %build
+# This package fails its testsuite on s390x when LTO is enabled.  Root cause
+# analysis has not yet been performed
+%ifarch s390x
+%define _lto_cflags %{nil}
+%endif
 # This is the test suite, which doesn't build much but does verify its dependencies.
 # If this is done after the configure call, the one thing it does build fails
 # because the configure macro puts some hardening flags into the environment.
@@ -721,6 +726,9 @@ getent passwd cyrus >/dev/null || /usr/sbin/useradd -c "Cyrus IMAP Server" -d /v
 
 
 %changelog
+* Mon Aug 10 2020 Jeff Law <law@redhat.com> - 3.0.13-12
+- Disable LTO on s390x for now
+
 * Sat Aug 01 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.13-11
 - Second attempt - Rebuilt for
   https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild