Add patch by spot from the Fedora Chromium RPM for FTBFS with GCC 8 on i686

qt5-qtwebengine.spec

@@ -112,6 +112,11 @@ Patch21: qtwebengine-everywhere-src-5.10.0-gn-bootstrap-verbose.patch
 # https://codereview.qt-project.org/#/c/196922/
 # see QTBUG-60886 and QTBUG-65090
 Patch22: qtwebengine-everywhere-src-5.10.0-icu59.patch
+# Fix FTBFS with GCC 8 on i686: GCC8 has changed the alignof operator to return
+# the minimal alignment required by the target ABI instead of the preferred
+# alignment. This means int64_t is now 4 on i686 (instead of 8). Use __alignof__
+# to get the value we expect (and chromium checks for). Patch by spot.
+Patch23: qtwebengine-everywhere-src-5.10.1-gcc8-alignof.patch
 ## Upstream patches:
 # drop support for obsolete Unicode "aspirational scripts" (dropped in UTS 31),
 # fixes #error with ICU >= 60 (which was a reminder to double-check the list)
@@ -373,6 +378,7 @@ BuildArch: noarch
 %patch12 -p1 -b .webrtc-neon-detect
 %patch21 -p1 -b .gn-bootstrap-verbose
 %patch22 -p1 -b .icu59
+%patch23 -p1 -b .gcc8
 %patch100 -p1 -b .no-aspirational-scripts
 %patch101 -p1 -b .security-5.9.5
 %patch102 -p1 -b .CVE-2018-6033
@@ -583,6 +589,7 @@ done
 %changelog
 * Sun May 27 2018 Rex Dieter <rdieter@fedoraproject.org> - 5.10.1-7
 - rebuild (qt5 5.11.0)
+- Add patch by spot from the Fedora Chromium RPM for FTBFS with GCC 8 on i686
 
 * Mon Apr 30 2018 Pete Walter <pwalter@fedoraproject.org> - 5.10.1-6
 - Rebuild for ICU 61.1

qtwebengine-everywhere-src-5.10.1-gcc8-alignof.patch

@@ -0,0 +1,18 @@
+diff -up qtwebengine-everywhere-src-5.10.1/src/3rdparty/chromium/mojo/public/c/system/macros.h.gcc8-alignof qtwebengine-everywhere-src-5.10.1/src/3rdparty/chromium/mojo/public/c/system/macros.h
+--- qtwebengine-everywhere-src-5.10.1/src/3rdparty/chromium/mojo/public/c/system/macros.h.gcc8-alignof	2018-05-15 14:58:46.448912634 -0400
++++ qtwebengine-everywhere-src-5.10.1/src/3rdparty/chromium/mojo/public/c/system/macros.h	2018-05-15 14:58:52.041784613 -0400
+@@ -18,7 +18,13 @@
+ #endif
+ 
+ // Like the C++11 |alignof| operator.
+-#if __cplusplus >= 201103L
++#if defined(__GNUC__) && __GNUC__ >= 8
++// GCC 8 has changed the alignof operator to return the minimal alignment
++// required by the target ABI, instead of the preferred alignment.
++// This means that on 32-bit x86, it will return 4 instead of 8.
++// Use __alignof__ instead to avoid this.
++#define MOJO_ALIGNOF(type) __alignof__(type)
++#elif __cplusplus >= 201103L
+ #define MOJO_ALIGNOF(type) alignof(type)
+ #elif defined(__GNUC__)
+ #define MOJO_ALIGNOF(type) __alignof__(type)