Merge branch 'bugfix/lto' into 'master'

Disable LTO also for RHEL 7

See merge request packaging/rpm-icinga2!4

icinga2.spec

@@ -68,9 +68,10 @@
 %bcond_without unity_build
 %endif
 
-# Disable lto_build for older SUSE versions
+# Disable lto_build for older compiler versions
 # see https://github.com/Icinga/icinga2/issues/7149
-%if "%{_vendor}" == "suse" && 0%{?suse_version} <= 1315
+# lto1: internal compiler error: in prune_unused_types_prune, at dwarf2out.c
+%if "%{_vendor}" == "suse" && 0%{?suse_version} <= 1315 || "%{_vendor}" == "redhat" && (0%{?el7} || 0%{?rhel} == 7 || "%{?dist}" == ".el7")
 %bcond_with lto_build
 %else # suse_version 1315
 %bcond_without lto_build