qtbase: add a config option to optimize for size

The '-optimize-size' option would enable the compiler to optimize
for size instead of speed. If the global compiler option already
included '-Os', this option would be enabled by default.

It would affect the whole Qt libraries and Qt applications as well.
This feature is available in Qt 5.9+.

Signed-off-by: Kwangsub Kim <kwangsub.kim@qt.io>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/recipes-qt/qt5/qtbase_git.bb b/recipes-qt/qt5/qtbase_git.bb
index 522e2615..4df7a767 100644
--- a/recipes-qt/qt5/qtbase_git.bb
+++ b/recipes-qt/qt5/qtbase_git.bb
@@ -70,7 +70,9 @@ PACKAGECONFIG_DISTRO ?= ""
 PACKAGECONFIG_RELEASE ?= "release"
 # This is in qt5.inc, because qtwebkit-examples are using it to enable ca-certificates dependency
 # PACKAGECONFIG_OPENSSL ?= "openssl"
-PACKAGECONFIG_DEFAULT ?= "dbus udev evdev widgets tools libs freetype tests"
+PACKAGECONFIG_DEFAULT ?= "dbus udev evdev widgets tools libs freetype tests \
+    ${@bb.utils.contains('SELECTED_OPTIMIZATION', '-Os', 'optimize-size', '', d)} \
+"
 
 PACKAGECONFIG ?= " \
     ${PACKAGECONFIG_RELEASE} \
@@ -88,6 +90,7 @@ PACKAGECONFIG[release] = "-release,-debug"
 PACKAGECONFIG[debug] = ""
 PACKAGECONFIG[developer] = "-developer-build"
 PACKAGECONFIG[qml-debug] = "-qml-debug,-no-qml-debug"
+PACKAGECONFIG[optimize-size] = "-optimize-size"
 PACKAGECONFIG[sm] = "-sm,-no-sm"
 PACKAGECONFIG[tests] = "-make tests,-nomake tests"
 PACKAGECONFIG[examples] = "-make examples -compile-examples,-nomake examples"