Manually change FTL_USES_B3 to 1 in DFGCommon.h. Then: [201/5346] Building CXX object Source/...criptCore.dir/bytecode/CodeBlock.cpp.o FAILED: /usr/lib64/ccache/clang++ -DBUILDING_GTK__=1 -DBUILDING_JavaScriptCore -DBUILDING_WITH_CMAKE=1 -DDATA_DIR=\"share\" -DGETTEXT_PACKAGE=\"WebKit2GTK-4.0\" -DHAVE_CONFIG_H=1 -DJavaScriptCore_EXPORTS -DLIBDIR=\"/home/mcatanzaro/src/jhbuild/install/lib\" -DSTATICALLY_LINKED_WITH_WTF -DUSER_AGENT_GTK_MAJOR_VERSION=\"602\" -DUSER_AGENT_GTK_MINOR_VERSION=\"1\" -DWEBKITGTK_API_VERSION_STRING=\"4.0\" -I. -I../../Source/JavaScriptCore -I../../Source/JavaScriptCore/.. -I../../Source/JavaScriptCore/API -I../../Source/JavaScriptCore/ForwardingHeaders -I../../Source/JavaScriptCore/assembler -I../../Source/JavaScriptCore/b3 -I../../Source/JavaScriptCore/b3/air -I../../Source/JavaScriptCore/bindings -I../../Source/JavaScriptCore/builtins -I../../Source/JavaScriptCore/bytecode -I../../Source/JavaScriptCore/bytecompiler -I../../Source/JavaScriptCore/dfg -I../../Source/JavaScriptCore/disassembler -I../../Source/JavaScriptCore/disassembler/udis86 -I../../Source/JavaScriptCore/ftl -I../../Source/JavaScriptCore/heap -I../../Source/JavaScriptCore/debugger -I../../Source/JavaScriptCore/inspector -I../../Source/JavaScriptCore/inspector/agents -I../../Source/JavaScriptCore/inspector/augmentable -I../../Source/JavaScriptCore/inspector/remote -I../../Source/JavaScriptCore/interpreter -I../../Source/JavaScriptCore/jit -I../../Source/JavaScriptCore/llint -I../../Source/JavaScriptCore/llvm -I../../Source/JavaScriptCore/parser -I../../Source/JavaScriptCore/profiler -I../../Source/JavaScriptCore/replay -I../../Source/JavaScriptCore/runtime -I../../Source/JavaScriptCore/tools -I../../Source/JavaScriptCore/wasm -I../../Source/JavaScriptCore/yarr -IDerivedSources -IDerivedSources/ForwardingHeaders -IDerivedSources/JavaScriptCore -IDerivedSources/JavaScriptCore/inspector -I../../Source/WTF -isystem /home/mcatanzaro/src/jhbuild/install/include/glib-2.0 -isystem /home/mcatanzaro/src/jhbuild/install/lib/glib-2.0/include -std=c++11 -fcolor-diagnostics -gsplit-dwarf -Qunused-arguments -g -fPIC -Wall -Wextra -Wcast-align -Wformat-security -Wmissing-format-attribute -Wpointer-arith -Wundef -Wwrite-strings -Wno-parentheses-equality -MMD -MT Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/bytecode/CodeBlock.cpp.o -MF Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/bytecode/CodeBlock.cpp.o.d -o Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/bytecode/CodeBlock.cpp.o -c ../../Source/JavaScriptCore/bytecode/CodeBlock.cpp In file included from ../../Source/JavaScriptCore/bytecode/CodeBlock.cpp:79: In file included from ../../Source/JavaScriptCore/ftl/FTLJITCode.h:35: ../../Source/JavaScriptCore/ftl/FTLOSRExit.h:176:12: error: no member named 'ValueRep' in namespace 'JSC::B3'; did you mean 'DFG::ValueRep'? Vector<B3::ValueRep> m_valueReps; ^~~~~~~~~~~~ DFG::ValueRep ../../Source/JavaScriptCore/dfg/DFGNodeType.h:367:565: note: 'DFG::ValueRep' declared here JSConstant, DoubleConstant, Int52Constant, Identity, ToThis, CreateThis, GetCallee, GetArgumentCount, GetLocal, SetLocal, PutStack, KillStack, GetStack, MovHint, ZombieHint, ExitOK, Phantom, Check, Upsilon, Phi, Flush, PhantomLocal, LoopHint, ExtractOSREntryLocal, CheckTierUpInLoop, CheckTierUpAndOSREnter, CheckTierUpWithNestedTriggerAndOSREnter, CheckTierUpAtReturn, GetLocalUnlinked, SetArgument, InvalidationPoint, BitAnd, BitOr, BitXor, BitLShift, BitRShift, BitURShift, ValueToInt32, UInt32ToNumber, BooleanToNumber, DoubleAsInt32, DoubleRep, Int52Rep, ValueRep, FiatInt52, ArithAdd, ArithClz32, ArithSub, ArithNegate, ArithMul, ArithIMul, ArithDiv, ArithMod, ArithAbs, ArithMin, ArithMax, ArithFRound, ArithPow, ArithRandom, ArithRound, ArithSqrt, ArithSin, ArithCos, ArithLog, ValueAdd, StrCat, GetByVal, GetMyArgumentByVal, LoadVarargs, ForwardVarargs, PutByValDirect, PutByVal, PutByValAlias, GetById, GetByIdFlush, PutById, PutByIdFlush, PutByIdDirect, PutGetterById, PutSetterById, PutGetterSetterById, PutGetterByVal, PutSetterByVal, CheckStructure, GetExecutable, PutStructure, AllocatePropertyStorage, ReallocatePropertyStorage, GetButterfly, GetButterflyReadOnly, CheckArray, Arrayify, ArrayifyToStructure, GetIndexedPropertyStorage, ConstantStoragePointer, GetGetter, GetSetter, GetByOffset, GetGetterSetterByOffset, MultiGetByOffset, PutByOffset, MultiPutByOffset, GetArrayLength, GetTypedArrayByteOffset, GetScope, SkipScope, GetClosureVar, PutClosureVar, GetGlobalVar, GetGlobalLexicalVariable, PutGlobalVariable, NotifyWrite, VarInjectionWatchpoint, CheckCell, CheckNotEmpty, CheckBadCell, CheckInBounds, CheckIdent, CheckTypeInfoFlags, ArrayPush, ArrayPop, RegExpExec, RegExpTest, StringCharCodeAt, StringCharAt, StringFromCharCode, CompareLess, CompareLessEq, CompareGreater, CompareGreaterEq, CompareEq, CompareStrictEq, Call, Construct, CallVarargs, CallForwardVarargs, ConstructVarargs, ConstructForwardVarargs, TailCallInlinedCaller, TailCallVarargsInlinedCaller, TailCallForwardVarargsInlinedCaller, NewObject, NewArray, NewArrayWithSize, NewArrayBuffer, NewTypedArray, NewRegexp, GetRestLength, CopyRest, PhantomNewObject, PutHint, CheckStructureImmediate, MaterializeNewObject, PhantomNewFunction, PhantomNewGeneratorFunction, PhantomCreateActivation, MaterializeCreateActivation, Breakpoint, ProfileWillCall, ProfileDidCall, OverridesHasInstance, InstanceOf, InstanceOfCustom, IsUndefined, IsBoolean, IsNumber, IsString, IsObject, IsObjectOrNull, IsFunction, TypeOf, LogicalNot, ToPrimitive, ToString, CallStringConstructor, NewStringObject, MakeRope, In, ProfileType, ProfileControlFlow, CreateActivation, CreateDirectArguments, PhantomDirectArguments, CreateScopedArguments, CreateClonedArguments, PhantomClonedArguments, GetFromArguments, PutToArguments, NewFunction, NewArrowFunction, NewGeneratorFunction, Throw, ThrowReferenceError, Jump, Branch, Switch, Return, TailCall, TailCallVarargs, TailCallForwardVarargs, Unreachable, CountExecution, ForceOSRExit, BottomValue, CheckWatchdogTimer, StoreBarrier, GetEnumerableLength, HasIndexedProperty, HasStructureProperty, HasGenericProperty, GetDirectPname, GetPropertyEnumerator, GetEnumeratorStructurePname, GetEnumeratorGenericPname, ToIndexString, ^ In file included from ../../Source/JavaScriptCore/bytecode/CodeBlock.cpp:79: In file included from ../../Source/JavaScriptCore/ftl/FTLJITCode.h:35: ../../Source/JavaScriptCore/ftl/FTLOSRExit.h:176:12: error: template argument for template type parameter must be a type Vector<B3::ValueRep> m_valueReps; ^~~~~~~~~~~~ ../../Source/WTF/wtf/Forward.h:37:19: note: template parameter is declared here template<typename T, size_t inlineCapacity, typename OverflowHandler, size_t minCapacity> class Vector; ^ In file included from ../../Source/JavaScriptCore/bytecode/CodeBlock.cpp:79: In file included from ../../Source/JavaScriptCore/ftl/FTLJITCode.h:35: ../../Source/JavaScriptCore/ftl/FTLOSRExit.h:193:22: error: cannot initialize object parameter of type 'JSC::DFG::OSRExitBase' with an expression of type 'JSC::FTL::OSRExit' OSRExitBase::considerAddingAsFrequentExitSite(profiledCodeBlock, ExitFromFTL); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../../Source/JavaScriptCore/bytecode/CodeBlock.cpp:79: ../../Source/JavaScriptCore/ftl/FTLJITCode.h:72:53: error: no member named 'OpaqueByproducts' in namespace 'JSC::B3' void initializeB3Byproducts(std::unique_ptr<B3::OpaqueByproducts>); ~~~~^ ../../Source/JavaScriptCore/ftl/FTLJITCode.h:111:25: error: no member named 'OpaqueByproducts' in namespace 'JSC::B3' std::unique_ptr<B3::OpaqueByproducts> m_b3Byproducts; ~~~~^ 5 errors generated. [201/5346] Building CXX object Source/...bytecode/LazyOperandValueProfile.cpp.o ninja: build stopped: subcommand failed.