diff -ur qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/build/config/compiler/BUILD.gn qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/build/config/compiler/BUILD.gn
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2018-08-13 01:44:53.799249439 +0200
@@ -661,14 +661,7 @@
   if (is_posix && !(is_mac || is_ios)) {
     # CPU architecture. We may or may not be doing a cross compile now, so for
     # simplicity we always explicitly set the architecture.
-    if (current_cpu == "x64") {
-      cflags += [
-        "-m64",
-      ]
-      ldflags += [ "-m64" ]
-    } else if (current_cpu == "x86") {
-      cflags += [ "-m32" ]
-      ldflags += [ "-m32" ]
+    if (current_cpu == "x86") {
       if (!is_nacl) {
         cflags += [
           "-msse2",
diff -ur qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/urandom.c qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/urandom.c
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/urandom.c	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/third_party/boringssl/src/crypto/fipsmodule/rand/urandom.c	2018-08-13 01:55:47.227682313 +0200
@@ -47,7 +47,11 @@
 #if defined(OPENSSL_LINUX)
 
 #if defined(OPENSSL_X86_64)
+#if defined(__ILP32__)
+#define EXPECTED_NR_getrandom (__X32_SYSCALL_BIT + 318)
+#else
 #define EXPECTED_NR_getrandom 318
+#endif
 #elif defined(OPENSSL_X86)
 #define EXPECTED_NR_getrandom 355
 #elif defined(OPENSSL_AARCH64)
diff -ur qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/gypfiles/toolchain.gypi qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/v8/gypfiles/toolchain.gypi
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/gypfiles/toolchain.gypi	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/v8/gypfiles/toolchain.gypi	2018-08-13 01:44:03.828604732 +0200
@@ -1042,28 +1042,6 @@
           }],
         ],
       }],
-      ['(OS=="linux" or OS=="android") and \
-        (v8_target_arch=="x64" or v8_target_arch=="arm64" or \
-         v8_target_arch=="ppc64" or v8_target_arch=="s390x")', {
-        'target_conditions': [
-          ['_toolset=="host"', {
-            'conditions': [
-              ['host_cxx_is_biarch==1', {
-                'cflags': [ '-m64' ],
-                'ldflags': [ '-m64' ]
-              }],
-             ],
-           }],
-           ['_toolset=="target"', {
-             'conditions': [
-               ['target_cxx_is_biarch==1', {
-                 'cflags': [ '-m64' ],
-                 'ldflags': [ '-m64' ],
-               }],
-             ]
-           }],
-         ],
-      }],
       ['OS=="android" and v8_android_log_stdout==1', {
         'defines': [
           'V8_ANDROID_LOG_STDOUT',
diff -ur qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/src/objects/bigint.cc qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/v8/src/objects/bigint.cc
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/src/objects/bigint.cc	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1-x32/src/3rdparty/chromium/v8/src/objects/bigint.cc	2018-08-13 02:15:32.443103386 +0200
@@ -2162,7 +2162,7 @@
 BigInt::digit_t MutableBigInt::digit_div(digit_t high, digit_t low,
                                          digit_t divisor, digit_t* remainder) {
   DCHECK(high < divisor);
-#if V8_TARGET_ARCH_X64 && (__GNUC__ || __clang__)
+#if V8_TARGET_ARCH_X64 && (__GNUC__ || __clang__) && !defined(__ILP32__)
   digit_t quotient;
   digit_t rem;
   __asm__("divq  %[divisor]"
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/src/compiler/instruction-selector.cc.orig	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/v8/src/compiler/instruction-selector.cc	2018-08-14 09:18:33.177100945 +0200
@@ -1927,7 +1927,7 @@
 }
 
 // 32 bit targets do not implement the following instructions.
-#if V8_TARGET_ARCH_32_BIT
+#if V8_TARGET_ARCH_32_BIT && !V8_TARGET_ARCH_X64
 
 void InstructionSelector::VisitWord64And(Node* node) { UNIMPLEMENTED(); }
 
@@ -2081,7 +2081,7 @@
 #endif  // V8_TARGET_ARCH_32_BIT
 
 // 64 bit targets do not implement the following instructions.
-#if V8_TARGET_ARCH_64_BIT
+#if V8_TARGET_ARCH_64_BIT || V8_TARGET_ARCH_X64
 void InstructionSelector::VisitInt32PairAdd(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitInt32PairSub(Node* node) { UNIMPLEMENTED(); }
--- qtwebengine-everywhere-src-5.11.1.clean/src/3rdparty/chromium/build/build_config.h~	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1.clean/src/3rdparty/chromium/build/build_config.h	2018-08-14 09:23:40.756276384 +0200
@@ -106,7 +106,11 @@
 #if defined(_M_X64) || defined(__x86_64__)
 #define ARCH_CPU_X86_FAMILY 1
 #define ARCH_CPU_X86_64 1
+#ifdef __ILP32__
+#define ARCH_CPU_32_BITS 1
+#else
 #define ARCH_CPU_64_BITS 1
+#endif
 #define ARCH_CPU_LITTLE_ENDIAN 1
 #elif defined(_M_IX86) || defined(__i386__)
 #define ARCH_CPU_X86_FAMILY 1
--- qtwebengine-everywhere-src-5.11.1.clean/src/3rdparty/chromium/third_party/pdfium/third_party/build/build_config.h~	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1.clean/src/3rdparty/chromium/third_party/pdfium/third_party/build/build_config.h	2018-08-14 09:24:56.127049857 +0200
@@ -104,7 +104,11 @@
 #if defined(_M_X64) || defined(__x86_64__)
 #define ARCH_CPU_X86_FAMILY 1
 #define ARCH_CPU_X86_64 1
+#ifdef __ILP32__
+#define ARCH_CPU_32_BITS 1
+#else
 #define ARCH_CPU_64_BITS 1
+#endif
 #define ARCH_CPU_LITTLE_ENDIAN 1
 #elif defined(_M_IX86) || defined(__i386__)
 #define ARCH_CPU_X86_FAMILY 1
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc~	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/base/allocator/partition_allocator/address_space_randomization.cc	2018-08-14 09:27:44.678865071 +0200
@@ -77,7 +77,7 @@
 void* GetRandomPageBase() {
   uintptr_t random = static_cast<uintptr_t>(ranval(s_ranctx.Pointer()));
 
-#if defined(ARCH_CPU_64_BITS)
+#if defined(ARCH_CPU_64_BITS) && !defined(__ILP32__)
   random <<= 32ULL;
   random |= static_cast<uintptr_t>(ranval(s_ranctx.Pointer()));
 
--- qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/base/debug/stack_trace_posix.cc~	2018-06-15 09:47:20.000000000 +0200
+++ qtwebengine-everywhere-src-5.11.1/src/3rdparty/chromium/base/debug/stack_trace_posix.cc	2018-08-14 09:46:02.035829506 +0200
@@ -340,7 +340,7 @@
     const char* label;
     greg_t value;
   } registers[] = {
-#if ARCH_CPU_32_BITS
+#if ARCH_CPU_32_BITS && !defined(__ILP32__)
     { "  gs: ", context->uc_mcontext.gregs[REG_GS] },
     { "  fs: ", context->uc_mcontext.gregs[REG_FS] },
     { "  es: ", context->uc_mcontext.gregs[REG_ES] },
@@ -360,7 +360,7 @@
     { " efl: ", context->uc_mcontext.gregs[REG_EFL] },
     { " usp: ", context->uc_mcontext.gregs[REG_UESP] },
     { "  ss: ", context->uc_mcontext.gregs[REG_SS] },
-#elif ARCH_CPU_64_BITS
+#elif ARCH_CPU_64_BITS || defined(__ILP32__)
     { "  r8: ", context->uc_mcontext.gregs[REG_R8] },
     { "  r9: ", context->uc_mcontext.gregs[REG_R9] },
     { " r10: ", context->uc_mcontext.gregs[REG_R10] },
@@ -387,9 +387,9 @@
 #endif  // ARCH_CPU_32_BITS
   };
 
-#if ARCH_CPU_32_BITS
+#if ARCH_CPU_32_BITS && !defined(__ILP32__)
   const int kRegisterPadding = 8;
-#elif ARCH_CPU_64_BITS
+#elif ARCH_CPU_64_BITS || defined(__ILP32__)
   const int kRegisterPadding = 16;
 #endif