diff --git a/depends/packages/native_cctools.mk b/depends/packages/native_cctools.mk
--- a/depends/packages/native_cctools.mk
+++ b/depends/packages/native_cctools.mk
@@ -4,11 +4,11 @@
 $(package)_file_name=$($(package)_version).tar.gz
 $(package)_sha256_hash=a09c9ba4684670a0375e42d9d67e7f12c1f62581a27f28f7c825d6d7032ccc6a
 $(package)_build_subdir=cctools
-$(package)_clang_version=3.7.1
+$(package)_clang_version=5.0.1
 $(package)_clang_download_path=http://llvm.org/releases/$($(package)_clang_version)
-$(package)_clang_download_file=clang+llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-14.04.tar.xz
-$(package)_clang_file_name=clang-llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-14.04.tar.xz
-$(package)_clang_sha256_hash=99b28a6b48e793705228a390471991386daa33a9717cd9ca007fcdde69608fd9
+$(package)_clang_download_file=clang+llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-16.04.tar.xz
+$(package)_clang_file_name=clang-llvm-$($(package)_clang_version)-x86_64-linux-gnu-ubuntu-16.04.tar.xz
+$(package)_clang_sha256_hash=005f21861cd2953138df7cf511f1552ef7041bafb7cfc4b172264b7ff5fe09b4
 $(package)_extra_sources=$($(package)_clang_file_name)
 
 define $(package)_fetch_cmds
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -8,12 +8,11 @@
 $(package)_linux_dependencies=freetype fontconfig libxcb libX11 xproto libXext
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib network widgets gui plugins testlib
-$(package)_patches=mac-qmake.conf mingw-uuidof.patch pidlist_absolute.patch fix-xcb-include-order.patch fix_qt_pkgconfig.patch
+$(package)_patches=mac-qmake.conf mingw-uuidof.patch pidlist_absolute.patch fix-xcb-include-order.patch fix_qt_pkgconfig.patch clang-5-darwin.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=3a15aebd523c6d89fb97b2d3df866c94149653a26d27a00aac9b6d3020bc5a1d
 
-
 $(package)_qttools_file_name=qttools-$($(package)_suffix)
 $(package)_qttools_sha256_hash=22d67de915cb8cd93e16fdd38fa006224ad9170bd217c2be1e53045a8dd02f0f
 
@@ -139,6 +138,7 @@
   patch -p1 < $($(package)_patch_dir)/pidlist_absolute.patch && \
   patch -p1 < $($(package)_patch_dir)/fix-xcb-include-order.patch && \
   patch -p1 < $($(package)_patch_dir)/fix_qt_pkgconfig.patch && \
+  patch -p1 < $($(package)_patch_dir)/clang-5-darwin.patch && \
   echo "!host_build: QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
diff --git a/depends/patches/qt/clang-5-darwin.patch b/depends/patches/qt/clang-5-darwin.patch
new file mode 100644
--- /dev/null
+++ b/depends/patches/qt/clang-5-darwin.patch
@@ -0,0 +1,11 @@
+--- old/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm	2018-04-30 18:07:35.129250331 +0200
++++ new/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm	2018-04-30 18:08:40.886427591 +0200
+@@ -772,7 +772,7 @@
+ 
+ QFixed QCoreTextFontEngine::emSquareSize() const
+ {
+-    return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
++    return QFixed(int(CTFontGetUnitsPerEm(ctfont)));
+ }
+ 
+ QFontEngine *QCoreTextFontEngine::cloneWithSize(qreal pixelSize) const