diff -rauN webkitgtk-2.27.91/Source/cmake/WebKitCompilerFlags.cmake webkitgtk-2.27.91-no-sse2-patch/Source/cmake/WebKitCompilerFlags.cmake
--- webkitgtk-2.27.91/Source/cmake/WebKitCompilerFlags.cmake	2020-02-25 14:02:33.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/cmake/WebKitCompilerFlags.cmake	2020-03-08 10:52:59.256386510 +0100
@@ -140,13 +140,13 @@
     endif ()
 
     # Force SSE2 fp on x86 builds.
-    if (WTF_CPU_X86 AND NOT CMAKE_CROSSCOMPILING)
-        WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-msse2 -mfpmath=sse)
-        include(DetectSSE2)
-        if (NOT SSE2_SUPPORT_FOUND)
-            message(FATAL_ERROR "SSE2 support is required to compile WebKit")
-        endif ()
-    endif ()
+#    if (WTF_CPU_X86 AND NOT CMAKE_CROSSCOMPILING)
+#        WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-msse2 -mfpmath=sse)
+#        include(DetectSSE2)
+#        if (NOT SSE2_SUPPORT_FOUND)
+#            message(FATAL_ERROR "SSE2 support is required to compile WebKit")
+#        endif ()
+#    endif ()
 endif ()
 
 if (COMPILER_IS_GCC_OR_CLANG AND NOT MSVC)
diff -rauN webkitgtk-2.27.91/Source/ThirdParty/ANGLE/src/common/mathutil.h webkitgtk-2.27.91-no-sse2-patch/Source/ThirdParty/ANGLE/src/common/mathutil.h
--- webkitgtk-2.27.91/Source/ThirdParty/ANGLE/src/common/mathutil.h	2020-02-05 11:02:04.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/ThirdParty/ANGLE/src/common/mathutil.h	2020-03-08 14:02:05.582650747 +0100
@@ -145,6 +145,7 @@
 
 inline bool supportsSSE2()
 {
+    return false;
 #if defined(ANGLE_USE_SSE)
     static bool checked  = false;
     static bool supports = false;
diff -rauN webkitgtk-2.27.91/Source/ThirdParty/ANGLE/src/image_util/loadimage.cpp webkitgtk-2.27.91-no-sse2-patch/Source/ThirdParty/ANGLE/src/image_util/loadimage.cpp
--- webkitgtk-2.27.91/Source/ThirdParty/ANGLE/src/image_util/loadimage.cpp	2020-02-05 11:02:04.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/ThirdParty/ANGLE/src/image_util/loadimage.cpp	2020-03-08 10:57:55.570049890 +0100
@@ -26,6 +26,7 @@
                    size_t outputDepthPitch)
 {
 #if defined(ANGLE_USE_SSE)
+#error No SSE2
     if (gl::supportsSSE2())
     {
         __m128i zeroWide = _mm_setzero_si128();
diff -rauN webkitgtk-2.27.91/Source/WebCore/platform/audio/SincResampler.cpp webkitgtk-2.27.91-no-sse2-patch/Source/WebCore/platform/audio/SincResampler.cpp
--- webkitgtk-2.27.91/Source/WebCore/platform/audio/SincResampler.cpp	2020-02-04 11:24:07.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/WebCore/platform/audio/SincResampler.cpp	2020-03-08 11:04:31.904959427 +0100
@@ -36,6 +36,7 @@
 #include <wtf/MathExtras.h>
 
 #if CPU(X86_SSE2)
+#error No SSE2
 #include <emmintrin.h>
 #endif
 
diff -rauN webkitgtk-2.27.91/Source/WebCore/platform/audio/VectorMath.cpp webkitgtk-2.27.91-no-sse2-patch/Source/WebCore/platform/audio/VectorMath.cpp
--- webkitgtk-2.27.91/Source/WebCore/platform/audio/VectorMath.cpp	2020-02-04 11:24:07.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/WebCore/platform/audio/VectorMath.cpp	2020-03-08 11:05:13.875479720 +0100
@@ -33,6 +33,7 @@
 #endif
 
 #if CPU(X86_SSE2)
+#error No SSE2
 #include <emmintrin.h>
 #endif
 
diff -rauN webkitgtk-2.27.91/Source/WTF/wtf/PlatformCPU.h webkitgtk-2.27.91-no-sse2-patch/Source/WTF/wtf/PlatformCPU.h
--- webkitgtk-2.27.91/Source/WTF/wtf/PlatformCPU.h	2020-02-04 11:24:07.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/WTF/wtf/PlatformCPU.h	2020-03-08 11:06:26.063041396 +0100
@@ -99,7 +99,7 @@
 #define WTF_CPU_KNOWN 1
 
 #if defined(__SSE2__) || (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
-#define WTF_CPU_X86_SSE2 1
+/* #define WTF_CPU_X86_SSE2 1 */
 #endif
 
 #endif
diff -rauN webkitgtk-2.27.91/Source/WTF/wtf/text/ASCIIFastPath.h webkitgtk-2.27.91-no-sse2-patch/Source/WTF/wtf/text/ASCIIFastPath.h
--- webkitgtk-2.27.91/Source/WTF/wtf/text/ASCIIFastPath.h	2020-02-04 11:24:07.000000000 +0100
+++ webkitgtk-2.27.91-no-sse2-patch/Source/WTF/wtf/text/ASCIIFastPath.h	2020-03-08 11:06:54.516727539 +0100
@@ -27,6 +27,7 @@
 #include <wtf/text/LChar.h>
 
 #if CPU(X86_SSE2)
+#error No SSE2
 #include <emmintrin.h>
 #endif