diff -ur qtwebengine-opensource-src-5.9.0/src/core/config/linux.pri qtwebengine-opensource-src-5.9.0-no-neon/src/core/config/linux.pri
--- qtwebengine-opensource-src-5.9.0/src/core/config/linux.pri	2017-05-19 06:22:04.000000000 +0200
+++ qtwebengine-opensource-src-5.9.0-no-neon/src/core/config/linux.pri	2017-06-08 00:55:22.257781563 +0200
@@ -70,7 +70,9 @@
             gn_args += arm_use_neon=false
             # If the toolchain does not explicitly specify to use NEON instructions
             # we use arm_neon_optional for ARMv7
-            equals(MARMV, 7): gn_args += arm_optionally_use_neon=true
+            # Disable NEON entirely for now, if set in the specfile, e.g., to
+            # work around some build failure.
+            # equals(MARMV, 7): gn_args += arm_optionally_use_neon=true
         }
     }