$ git diff --patch-with-stat --summary 2c8c656c921c562fe24e6758bdecacafc127c10b..8fa5664cf9832b07d03eb1965fa20d926aa11258

 .abf.yml             |  2 +-
 qt5-qtwebengine.spec | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.abf.yml b/.abf.yml
index 35c76f8..a6fd475 100644
--- a/.abf.yml
+++ b/.abf.yml
@@ -1,2 +1,2 @@
 sources:
-  qtwebengine-everywhere-src-5.13.0-beta4.tar.xz: 48deecac6df81267e490856f20e459241dea7f74
+  qtwebengine-everywhere-src-5.13.0-rc.tar.xz: 67d85d39e997de2ea5370bd49eed806baa1537aa
diff --git a/qt5-qtwebengine.spec b/qt5-qtwebengine.spec
index b7129ee..824ea0e 100644
--- a/qt5-qtwebengine.spec
+++ b/qt5-qtwebengine.spec
@@ -1,5 +1,5 @@
 %define _disable_ld_no_undefined 1
-%define beta beta4
+%define beta rc
 %define	debug_package %nil
 # FIXME build failure w/ 5.11.0beta4, clang 6.0, binutils 2.30
 #define _disable_lto 1
@@ -18,7 +18,7 @@ Summary:	Qt WebEngine
 Name:		qt5-qtwebengine
 Version:	5.13.0
 %if "%{beta}" != ""
-Release:	0.%{beta}.2
+Release:	0.%{beta}.1
 %define qttarballdir qtwebengine-everywhere-src-%{version}-%{beta}
 Source0:	http://download.qt.io/development_releases/qt/%(echo %{version}|cut -d. -f1-2)/%{version}-%{beta}/submodules/%{qttarballdir}.tar.xz
 %else
@@ -326,6 +326,13 @@ export QMAKE_CC=gcc
 export QMAKE_CXX=g++
 export QMAKE_XSPEC=linux-g++
 export QMAKESPEC=%{_libdir}/qt5/mkspecs/${QMAKE_XSPEC}
+%else
+export CC=clang
+export CXX=clang++
+export QMAKE_CC=clang
+export QMAKE_CXX=clang++
+export QMAKE_XSPEC=linux-clang
+export QMAKESPEC=%{_libdir}/qt5/mkspecs/${QMAKE_XSPEC}
 %endif
 
 mkdir %{_target_platform}