diff --git a/development/gambas3/gambas3.SlackBuild b/development/gambas3/gambas3.SlackBuild
index 3b566653e7..7bcb9d319c 100644
--- a/development/gambas3/gambas3.SlackBuild
+++ b/development/gambas3/gambas3.SlackBuild
@@ -24,7 +24,7 @@
 
 PRGNAM=gambas3
 VERSION=${VERSION:-3.9.1}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 SHORT_PRGNAM=${PRGNAM%$(cut -d . -f 1 <<< $VERSION)}
@@ -66,6 +66,12 @@ tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
 cd $PRGNAM-$VERSION
 chown -R root:root .
 
+# Fix building against qt5 >= 5.7.0
+# https://sourceforge.net/p/gambas/mailman/message/35618038/
+patch -p3 < $CWD/qt5-ext-5.7.patch
+patch -p3 < $CWD/qt5-5.7.patch
+patch -p3 < $CWD/qt5-webkit-5.7.patch
+
 ./reconf-all
 
 CFLAGS="$SLKCFLAGS" \
diff --git a/development/gambas3/qt5-5.7.patch b/development/gambas3/qt5-5.7.patch
new file mode 100644
index 0000000000..ffdb37485d
--- /dev/null
+++ b/development/gambas3/qt5-5.7.patch
@@ -0,0 +1,45 @@
+[GB.QT5]
+* BUG: The component now should compile correctly with C++11.
+Authored by:  gambas 2017-01-09
+Browse code at this revision
+Parent: [r8048]
+Child: [r8050]
+changed	/gambas/trunk/gb.qt4/src/CMenu.cpp
+changed	/gambas/trunk/gb.qt4/src/CWidget.cpp
+changed	/gambas/trunk/gb.qt5/src/Makefile.am
+/gambas/trunk/gb.qt4/src/CMenu.cpp Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt4/src/CMenu.cpp
++++ b/gambas/trunk/gb.qt4/src/CMenu.cpp
+@@ -59,7 +59,7 @@
+ 
+ #define HANDLE_PROXY(_ob) \
+ 	while (EXT(_ob) && EXT(_ob)->proxy) \
+-		_ob = (typeof _ob)(EXT(_ob)->proxy);
++		_ob = (__typeof__ _ob)(EXT(_ob)->proxy);
+ 
+ static CMENU_EXT *alloc_ext(CMENU *_object)
+ {
+/gambas/trunk/gb.qt4/src/CWidget.cpp Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt4/src/CWidget.cpp
++++ b/gambas/trunk/gb.qt4/src/CWidget.cpp
+@@ -96,7 +96,7 @@
+ 
+ #define HANDLE_PROXY(_ob) \
+ 	while (EXT(_ob) && EXT(_ob)->proxy) \
+-		_ob = (typeof _ob)(EXT(_ob)->proxy);
++		_ob = (__typeof__ _ob)(EXT(_ob)->proxy);
+ 
+ static CWIDGET_EXT *alloc_ext(CWIDGET *_object)
+ {
+/gambas/trunk/gb.qt5/src/Makefile.am Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt5/src/Makefile.am
++++ b/gambas/trunk/gb.qt5/src/Makefile.am
+@@ -8,7 +8,7 @@
+ 
+ gb_qt5_la_LIBADD = @THREAD_LIB@ @QT5_LIB@
+ gb_qt5_la_LDFLAGS = -module @LD_FLAGS@ @QT5_LDFLAGS@
+-gb_qt5_la_CXXFLAGS = @THREAD_INC@ -DGB_QT_COMPONENT $(AM_CXXFLAGS)
++gb_qt5_la_CXXFLAGS = @THREAD_INC@ -DGB_QT_COMPONENT $(AM_CXXFLAGS) -std=c++11
+ gb_qt5_la_CPPFLAGS = @QT5_INC@ -I$(top_srcdir)/share/
+ 
+ gb_qt5_la_SOURCES = \
diff --git a/development/gambas3/qt5-ext-5.7.patch b/development/gambas3/qt5-ext-5.7.patch
new file mode 100644
index 0000000000..662a3edcd5
--- /dev/null
+++ b/development/gambas3/qt5-ext-5.7.patch
@@ -0,0 +1,41 @@
+Commit [r8061]  Maximize  History
+
+[GB.QT5.EXT]
+* BUG: The component now should compile correctly with C++11.
+Authored by:  gambas 3 days ago
+Browse code at this revision
+Parent: [r8060]
+changed	/gambas/trunk/gb.qt5/configure.ac
+changed	/gambas/trunk/gb.qt5/src/ext/Makefile.am
+/gambas/trunk/gb.qt5/configure.ac Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt5/configure.ac
++++ b/gambas/trunk/gb.qt5/configure.ac
+@@ -14,11 +14,6 @@
+   qt5, QT5, gb.qt5, [src],
+   'Qt5Core >= 5.3.0' Qt5Gui Qt5Widgets Qt5Svg Qt5PrintSupport Qt5X11Extras x11
+ )
+-
+-## GB_COMPONENT_PKG_CONFIG(
+-##   qt5ext, QT5EXT, gb.qt5.ext, [ext],
+-##   'Qt5Core >= 5.4.0' Qt5Gui Qt5Widgets
+-## )
+ 
+ GB_COMPONENT_PKG_CONFIG(
+   qt5webkit, QT5WEBKIT, gb.qt5.webkit, [webkit],
+@@ -55,6 +50,4 @@
+ src/ext/Makefile \
+ )
+ 
+-## src/ext/Makefile \
+-
+ GB_PRINT_MESSAGES
+--- a/gambas/trunk/gb.qt5/src/ext/Makefile.am
++++ b/gambas/trunk/gb.qt5/src/ext/Makefile.am
+@@ -6,6 +6,7 @@
+ 
+ gb_qt5_ext_la_LIBADD = @QT5EXT_LIB@
+ gb_qt5_ext_la_LDFLAGS = -module @LD_FLAGS@ @QT5EXT_LDFLAGS@
++gb_qt5_ext_la_CXXFLAGS = @THREAD_INC@ $(AM_CXXFLAGS) -std=c++11
+ gb_qt5_ext_la_CPPFLAGS = @QT5EXT_INC@ -I$(top_srcdir)/share -I$(top_srcdir)/src/share
+ 
+ gb_qt5_ext_la_SOURCES = \
diff --git a/development/gambas3/qt5-webkit-5.7.patch b/development/gambas3/qt5-webkit-5.7.patch
new file mode 100644
index 0000000000..01a74260e9
--- /dev/null
+++ b/development/gambas3/qt5-webkit-5.7.patch
@@ -0,0 +1,30 @@
+[GB.QT5.WEBKIT]
+* BUG: The component now should compile correctly with C++11.
+Authored by:  gambas 2017-01-09
+Browse code at this revision
+Parent: [r8049]
+Child: [r8051]
+changed	/gambas/trunk/gb.qt5/src/opengl/Makefile.am
+changed	/gambas/trunk/gb.qt5/src/webkit/Makefile.am
+/gambas/trunk/gb.qt5/src/opengl/Makefile.am Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt5/src/opengl/Makefile.am
++++ b/gambas/trunk/gb.qt5/src/opengl/Makefile.am
+@@ -6,6 +6,7 @@
+ 
+ gb_qt5_opengl_la_LIBADD = @QT5OPENGL_LIB@ @QT5OPENGL_LIB@
+ gb_qt5_opengl_la_LDFLAGS = -module @LD_FLAGS@ @QT5OPENGL_LDFLAGS@
++gb_qt5_opengl_la_CXXFLAGS = @THREAD_INC@ $(AM_CXXFLAGS) -std=c++11
+ gb_qt5_opengl_la_CPPFLAGS = @QT5OPENGL_INC@
+ 
+ gb_qt5_opengl_la_SOURCES = main.h main.cpp
+/gambas/trunk/gb.qt5/src/webkit/Makefile.am Diff Switch to side-by-side view
+--- a/gambas/trunk/gb.qt5/src/webkit/Makefile.am
++++ b/gambas/trunk/gb.qt5/src/webkit/Makefile.am
+@@ -6,6 +6,7 @@
+ 
+ gb_qt5_webkit_la_LIBADD = @QT5WEBKIT_LIB@
+ gb_qt5_webkit_la_LDFLAGS = -module @LD_FLAGS@ @QT5WEBKIT_LDFLAGS@
++gb_qt5_webkit_la_CXXFLAGS = @THREAD_INC@ $(AM_CXXFLAGS) -std=c++11
+ gb_qt5_webkit_la_CPPFLAGS = @QT5WEBKIT_INC@ -I$(top_srcdir)/share -I$(top_srcdir)/src/share
+ 
+ gb_qt5_webkit_la_SOURCES = \