diff --git a/qtwebkit-5.212.0-alpha4-add-riscv64.patch b/qtwebkit-5.212.0-alpha4-add-riscv64.patch
new file mode 100644
index 0000000..9b4918b
--- /dev/null
+++ b/qtwebkit-5.212.0-alpha4-add-riscv64.patch
@@ -0,0 +1,133 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index db54eb4..ef22473 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -88,6 +88,8 @@ elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "s390")
+     set(WTF_CPU_S390 1)
+ elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "s390x")
+     set(WTF_CPU_S390X 1)
++elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "riscv64")
++    set(WTF_CPU_RISCV64 1)
+ else ()
+     message(FATAL_ERROR "Unknown CPU '${LOWERCASE_CMAKE_SYSTEM_PROCESSOR}'")
+ endif ()
+diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
+index afd76ca..3fca6e0 100644
+--- a/Source/JavaScriptCore/CMakeLists.txt
++++ b/Source/JavaScriptCore/CMakeLists.txt
+@@ -1289,6 +1289,7 @@ elseif (WTF_CPU_MIPS)
+ elseif (WTF_CPU_SH4)
+ elseif (WTF_CPU_X86)
+ elseif (WTF_CPU_X86_64)
++elseif (WTF_CPU_RISCV64)
+     if (MSVC AND ENABLE_JIT)
+         add_custom_command(
+             OUTPUT ${DERIVED_SOURCES_DIR}/JITStubsMSVC64.obj
+diff --git a/Source/ThirdParty/brotli/dec/port.h b/Source/ThirdParty/brotli/dec/port.h
+index 6b3d735..d1c8c14 100644
+--- a/Source/ThirdParty/brotli/dec/port.h
++++ b/Source/ThirdParty/brotli/dec/port.h
+@@ -56,10 +56,15 @@
+ #define BROTLI_TARGET_POWERPC64
+ #endif
+ 
++#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
++#define BROTLI_TARGET_RISCV64
++#endif
++
+ #ifdef BROTLI_BUILD_PORTABLE
+ #define BROTLI_ALIGNED_READ (!!1)
+ #elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
+-     defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8)
++     defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8) || \
++     defined(BROTLI_TARGET_RISCV64)
+ /* Allow unaligned read only for white-listed CPUs. */
+ #define BROTLI_ALIGNED_READ (!!0)
+ #else
+@@ -96,7 +101,7 @@ static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
+ #elif defined(BROTLI_BUILD_32_BIT)
+ #define BROTLI_64_BITS 0
+ #elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8) || \
+-    defined(BROTLI_TARGET_POWERPC64)
++    defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64)
+ #define BROTLI_64_BITS 1
+ #else
+ #define BROTLI_64_BITS 0
+diff --git a/Source/WTF/wtf/CMakeLists.txt b/Source/WTF/wtf/CMakeLists.txt
+index 297589b..2c29fcb 100644
+--- a/Source/WTF/wtf/CMakeLists.txt
++++ b/Source/WTF/wtf/CMakeLists.txt
+@@ -251,6 +251,9 @@ list(APPEND WTF_SOURCES
+ set(WTF_SYSTEM_INCLUDE_DIRECTORIES
+     ${ICU_INCLUDE_DIRS}
+ )
++
++list(APPEND WTF_LIBRARIES atomic)
++
+ list(APPEND WTF_LIBRARIES
+     ${ICU_I18N_LIBRARIES}
+     ${ICU_LIBRARIES}
+diff --git a/Source/WTF/wtf/Platform.h b/Source/WTF/wtf/Platform.h
+index 5717f3e..7aefa1b 100644
+--- a/Source/WTF/wtf/Platform.h
++++ b/Source/WTF/wtf/Platform.h
+@@ -176,6 +176,11 @@
+ #define WTF_CPU_X86_SSE2 1
+ #endif
+ 
++/* CPU(RISCV64) - RISCV64 */
++#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
++#define WTF_CPU_RISCV64 1
++#endif
++
+ /* CPU(ARM64) - Apple */
+ #if (defined(__arm64__) && defined(__APPLE__)) || defined(__aarch64__)
+ #define WTF_CPU_ARM64 1
+@@ -707,7 +712,8 @@
+     || CPU(S390X) \
+     || CPU(MIPS64) \
+     || CPU(PPC64) \
+-    || CPU(PPC64LE)
++    || CPU(PPC64LE) \
++    || CPU(RISCV64)
+ #define USE_JSVALUE64 1
+ #else
+ #define USE_JSVALUE32_64 1
+diff --git a/Source/WTF/wtf/dtoa/utils.h b/Source/WTF/wtf/dtoa/utils.h
+index 889642c..176d590 100644
+--- a/Source/WTF/wtf/dtoa/utils.h
++++ b/Source/WTF/wtf/dtoa/utils.h
+@@ -49,7 +49,7 @@
+ defined(__ARMEL__) || \
+ defined(_MIPS_ARCH_MIPS32R2)
+ #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
+-#elif CPU(MIPS) || CPU(MIPS64) || CPU(PPC) || CPU(PPC64) || CPU(PPC64LE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(ALPHA) || CPU(ARM64) || CPU(HPPA)
++#elif CPU(MIPS) || CPU(MIPS64) || CPU(PPC) || CPU(PPC64) || CPU(PPC64LE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(ALPHA) || CPU(ARM64) || CPU(HPPA) || CPU(RISCV64)
+ #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
+ #elif defined(_M_IX86) || defined(__i386__)
+ #if defined(_WIN32)
+diff --git a/Tools/Scripts/webkitdirs.pm b/Tools/Scripts/webkitdirs.pm
+index 45b6649..1b32756 100755
+--- a/Tools/Scripts/webkitdirs.pm
++++ b/Tools/Scripts/webkitdirs.pm
+@@ -1264,6 +1264,11 @@ sub isARM()
+     return ($Config{archname} =~ /^arm[v\-]/) || ($Config{archname} =~ /^aarch64[v\-]/);
+ }
+ 
++sub isRISCV()
++{
++    return ($Config{archname} =~ /^riscv(|32|64)\-/);
++}
++
+ sub isX86_64()
+ {
+     return (architecture() eq "x86_64") || 0;
+@@ -2069,7 +2074,7 @@ sub generateBuildSystemFromCMakeProject
+     # Compiler options to keep floating point values consistent
+     # between 32-bit and 64-bit architectures.
+     determineArchitecture();
+-    if ($architecture ne "x86_64" && !isARM() && !isCrossCompilation() && !isAnyWindows()) {
++    if ($architecture ne "x86_64" && !isARM() && !isRISCV && !isCrossCompilation() && !isAnyWindows()) {
+         $ENV{'CXXFLAGS'} = "-march=pentium4 -msse2 -mfpmath=sse " . ($ENV{'CXXFLAGS'} || "");
+     }
+