[Buildroot] [git commit branch/2019.02.x] package/qt5/qt5base: drop wrong optimization flag

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=269e14f89ff6d53d86a90eea68987667b3a5faa5
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2019.02.x

In qmake.conf.in has been left 'QMAKE_CXXFLAGS_RELEASE += -O3' but this
leads to not use Buildroot CXXFLAGS when building in release
mode(without debugging symbols). So let's remove it to let Qt5 to follow
Buildroot optimization flags like other packages do.

Signed-off-by: Giulio Benetti <giulio.benetti at micronovasrl.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
(cherry picked from commit 0650c4c7a3415399e3e099ec742685b8469418e7)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/qt5/qt5base/qmake.conf.in | 1 -
 1 file changed, 1 deletion(-)

diff --git a/package/qt5/qt5base/qmake.conf.in b/package/qt5/qt5base/qmake.conf.in
index f14527aa7f..26bee2cb39 100644
--- a/package/qt5/qt5base/qmake.conf.in
+++ b/package/qt5/qt5base/qmake.conf.in
@@ -15,7 +15,6 @@ QMAKE_CXX               = $${CROSS_COMPILE}g++
 # modifications to gcc-base.conf
 QMAKE_CFLAGS           += $${BR_COMPILER_CFLAGS}
 QMAKE_CXXFLAGS         += $${BR_COMPILER_CXXFLAGS}
-QMAKE_CXXFLAGS_RELEASE += -O3
 CONFIG                 += nostrip
 
 QMAKE_LIBS             += -lrt -lpthread -ldl