From: Davide Pesavento <pesa@gentoo.org>
Date: Tue, 19 Jan 2016 17:08:48 +0000 (+0100)
Subject: qt5-build.eclass: add -no-ltcg for 5.6 and later
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=a0ab6659af2fb224aa1d5957d48e3afa37a42eae;p=gentoo.git

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

(cherry picked from proj/qt commit a72b03f11e9d003e26607a1c80457bbf574fe3d7)
---

diff --git a/eclass/qt5-build.eclass b/eclass/qt5-build.eclass
index db08161cc87d..270ab1302072 100644
--- 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