Add a -force-asserts option to configure

We have the following scenario: Either you build a release package
without asserts, or a debug package with asserts. However, in embedded
development, we need asserts also in release packages. This flag allows
you to build a release package, but Q_ASSERTs still fire.

Change-Id: Icd1dd4dd63c3cafecf515b40741263d902ad42d1
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

configure

@@ -833,6 +833,7 @@ CFG_COREWLAN=auto
 CFG_ICD=auto
 CFG_NOPROCESS=no
 CFG_ICU=auto
+CFG_FORCE_ASSERTS=no
 
 # initalize variables used for installation
 QT_INSTALL_PREFIX=
@@ -1037,7 +1038,7 @@ while [ "$#" -gt 0 ]; do
         VAL=no
         ;;
     #Qt style yes options
-    -incremental|-qvfb|-profile|-shared|-static|-sm|-xinerama|-xshape|-xsync|-xinput|-xinput2|-egl|-reduce-exports|-pch|-separate-debug-info|-stl|-freetype|-xcursor|-xfixes|-xrandr|-xrender|-mitshm|-fontconfig|-xkb|-xcb|-wayland|-nis|-qdbus|-dbus|-dbus-linked|-glib|-gstreamer|-gtkstyle|-cups|-iconv|-largefile|-h|-help|-v|-verbose|-debug|-release|-fast|-accessibility|-confirm-license|-gnumake|-framework|-qt3support|-debug-and-release|-exceptions|-cocoa|-carbon|-universal|-harfbuzz|-prefix-install|-silent|-armfpa|-optimized-qmake|-dwarf2|-reduce-relocations|-sse|-openssl|-openssl-linked|-ptmalloc|-xmlpatterns|-phonon|-phonon-backend|-multimedia|-audio-backend|-svg|-v8|-declarative|-declarative-debug|-javascript-jit|-script|-scripttools|-rpath|-force-pkg-config|-icu)
+    -incremental|-qvfb|-profile|-shared|-static|-sm|-xinerama|-xshape|-xsync|-xinput|-xinput2|-egl|-reduce-exports|-pch|-separate-debug-info|-stl|-freetype|-xcursor|-xfixes|-xrandr|-xrender|-mitshm|-fontconfig|-xkb|-xcb|-wayland|-nis|-qdbus|-dbus|-dbus-linked|-glib|-gstreamer|-gtkstyle|-cups|-iconv|-largefile|-h|-help|-v|-verbose|-debug|-release|-fast|-accessibility|-confirm-license|-gnumake|-framework|-qt3support|-debug-and-release|-exceptions|-cocoa|-carbon|-universal|-harfbuzz|-prefix-install|-silent|-armfpa|-optimized-qmake|-dwarf2|-reduce-relocations|-sse|-openssl|-openssl-linked|-ptmalloc|-xmlpatterns|-phonon|-phonon-backend|-multimedia|-audio-backend|-svg|-v8|-declarative|-declarative-debug|-javascript-jit|-script|-scripttools|-rpath|-force-pkg-config|-icu|-force-asserts)
         VAR=`echo $1 | sed "s,^-\(.*\),\1,"`
         VAL=yes
         ;;
@@ -2403,6 +2404,13 @@ while [ "$#" -gt 0 ]; do
             UNKNOWN_OPT=yes
         fi
         ;;
+    force-asserts)
+        if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then
+            CFG_FORCE_ASSERTS="$VAL"
+        else
+            UNKNOWN_OPT=yes
+        fi
+        ;;
     *)
         UNKNOWN_OPT=yes
         ;;
@@ -7251,6 +7259,10 @@ if [ "$CFG_ICU" = "yes" ]; then
     QT_CONFIG="$QT_CONFIG icu"
 fi
 
+if [ "$CFG_FORCE_ASSERTS" = "yes" ]; then
+    QT_CONFIG="$QT_CONFIG force_asserts"
+fi
+
 #
 # Some Qt modules are too advanced in C++ for some old compilers
 # Detect here the platforms where they are known to work.

mkspecs/features/qt.prf

@@ -18,6 +18,7 @@ win32 {
    !isEmpty(QMAKESPEC_ORIGINAL):INCLUDEPATH += $$QMAKESPEC_ORIGINAL
 }
 CONFIG(release, debug|release):DEFINES += QT_NO_DEBUG
+contains(QT_CONFIG, force_asserts):DEFINES += QT_FORCE_ASSERTS
 no_keywords:DEFINES += QT_NO_KEYWORDS
 plugin { #Qt plugins
    static:DEFINES += QT_STATICPLUGIN

src/corelib/global/qglobal.h

@@ -1706,10 +1706,10 @@ inline QNoDebug qDebug();
 Q_CORE_EXPORT void qt_assert(const char *assertion, const char *file, int line);
 
 #if !defined(Q_ASSERT)
-#  ifndef QT_NO_DEBUG
-#    define Q_ASSERT(cond) ((!(cond)) ? qt_assert(#cond,__FILE__,__LINE__) : qt_noop())
-#  else
+#  if defined(QT_NO_DEBUG) && !defined(QT_FORCE_ASSERTS)
 #    define Q_ASSERT(cond) qt_noop()
+#  else
+#    define Q_ASSERT(cond) ((!(cond)) ? qt_assert(#cond,__FILE__,__LINE__) : qt_noop())
 #  endif
 #endif