qt5-build.eclass: add -no-ltcg for 5.6 and later

(cherry picked from proj/qt commit a72b03f11e9d003e26607a1c80457bbf574fe3d7)
johu · Feb 2, 2016 · a0ab665 · a0ab665
1 parent 9fede93
commit a0ab665
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/eclass/qt5-build.eclass b/eclass/qt5-build.eclass
@@ -583,13 +583,15 @@ qt5_base_configure() {
 		-no-icu -no-fontconfig
 		-no-dbus
 
-		# don't strip
+		# let portage handle stripping
 		-no-strip
 
-		# precompiled headers are not that useful for us
-		# and cause problems on hardened, so turn them off
+		# precompiled headers can cause problems on hardened, so turn them off
 		-no-pch
 
+		# link-time code generation is not something we want to enable by default
+		$([[ ${QT5_MINOR_VERSION} -ge 6 ]] && echo -no-ltcg)
+
 		# reduced relocations cause major breakage on at least arm and ppc, so
 		# don't specify anything and let the configure figure out if they are
 		# supported; see also https://bugreports.qt.io/browse/QTBUG-36129