BlackBerry mkspecs: optimize linker flags

* relro makes some sections read-only before giving control to the
program;
* now resolves all symbols when the program is started and allows for
 the GOT being marked read-only to prevent it from being overwritten.

These settings have been used internally for device builds already.

Change-Id: I9f62fffe618c75748e2357d1686289c23c5dbee5
Reviewed-by: Greg Bentz <gbentz@rim.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

diff --git a/mkspecs/blackberry-armv7le-qcc/qmake.conf b/mkspecs/blackberry-armv7le-qcc/qmake.conf
index b88b4db..45883b0 100644 (file)
--- a/mkspecs/blackberry-armv7le-qcc/qmake.conf
+++ b/mkspecs/blackberry-armv7le-qcc/qmake.conf
@@ -17,4 +17,6 @@ contains(QT_CONFIG, stack-protector-strong) {
 
 QMAKE_CFLAGS += -mcpu=cortex-a9
 
+QMAKE_LFLAGS_SHLIB += -Wl,-z,relro -Wl,-z,now
+
 include(../common/qcc-base-qnx-armv7le.conf)

diff --git a/mkspecs/blackberry-x86-qcc/qmake.conf b/mkspecs/blackberry-x86-qcc/qmake.conf
index 4dc3da6..d2c6b3c 100644 (file)
--- a/mkspecs/blackberry-x86-qcc/qmake.conf
+++ b/mkspecs/blackberry-x86-qcc/qmake.conf
@@ -15,4 +15,6 @@ contains(QT_CONFIG, stack-protector-strong) {
     QMAKE_CFLAGS += -fstack-protector -fstack-protector-all
 }
 
+QMAKE_LFLAGS_SHLIB += -Wl,-z,relro -Wl,-z,now
+
 include(../common/qcc-base-qnx-x86.conf)