Merge branch 'lto' into 'master'

Disable LTO build

See merge request packaging/rpm-icinga2!22

icinga2.spec

@@ -364,14 +364,9 @@ CMAKE_OPTS="$CMAKE_OPTS -DICINGA2_UNITY_BUILD=ON"
 CMAKE_OPTS="$CMAKE_OPTS -DICINGA2_UNITY_BUILD=OFF"
 %endif
 
-# Disable LTO build for older compiler versions
-# see https://github.com/Icinga/icinga2/issues/7149
+# Disable LTO build, see https://github.com/Icinga/icinga2/issues/7149
 # 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")
-CMAKE_OPTS="$CMAKE_OPTS -DICINGA2_LTO_BUILD=ON"
-%else # suse_version 1315
 CMAKE_OPTS="$CMAKE_OPTS -DICINGA2_LTO_BUILD=OFF"
-%endif # suse_version 1315
 
 %if %{with systemd_and_init}
 CMAKE_OPTS="$CMAKE_OPTS -DINSTALL_SYSTEMD_SERVICE_AND_INITSCRIPT=ON"