--- qtdeclarative-opensource-src-5.7.0/src/qml/jsruntime/qv4global_p.h	2016-06-11 14:05:08.000000000 +0200
+++ qtdeclarative-opensource-src-5.7.0/src/qml/jsruntime/qv4global_p.h.new	2016-07-15 21:17:04.313953097 +0200
@@ -91,7 +91,7 @@
 //
 // NOTE: This should match the logic in qv4targetplatform_p.h!
 
-#if defined(Q_PROCESSOR_X86) && !defined(__ILP32__) \
+#if defined(Q_PROCESSOR_X86) && !defined(__ILP32__) && defined(__SSE2__) \
     && (defined(Q_OS_WIN) || defined(Q_OS_LINUX) || defined(Q_OS_QNX) || defined(Q_OS_FREEBSD))
 #  define V4_ENABLE_JIT
 #elif defined(Q_PROCESSOR_X86_64) && !defined(__ILP32__) \
--- qtdeclarative-opensource-src-5.7.0/src/qml/jsruntime/jsruntime.pri	2016-06-11 14:05:08.000000000 +0200
+++ qtdeclarative-opensource-src-5.7.0/src/qml/jsruntime/jsruntime.pri.new	2016-07-15 21:13:37.519119496 +0200
@@ -108,6 +108,11 @@
     $$PWD/qv4string.cpp \
     $$PWD/qv4value.cpp
 
+linux-g++*:isEqual(QT_ARCH,i386):!no_sse2 {
+    QMAKE_CFLAGS += -msse2 -mfpmath=sse
+    QMAKE_CXXFLAGS += -msse2 -mfpmath=sse
+}
+
 valgrind {
     DEFINES += V4_USE_VALGRIND
 }
--- qtdeclarative-opensource-src-5.7.0/src/qml/qml/v8/qv8engine.cpp	2016-06-11 14:05:08.000000000 +0200
+++ qtdeclarative-opensource-src-5.7.0/src/qml/qml/v8/qv8engine.cpp.new	2016-07-15 21:18:37.202327536 +0200
@@ -130,7 +130,7 @@
     , m_xmlHttpRequestData(0)
     , m_listModelData(0)
 {
-#ifdef Q_PROCESSOR_X86_32
+#if defined(Q_PROCESSOR_X86_32) && defined(__SSE2__)
     if (!qCpuHasFeature(SSE2)) {
         qFatal("This program requires an X86 processor that supports SSE2 extension, at least a Pentium 4 or newer");
     }