NeonEmitter.cpp:249: error: ‘TGError’ was not declared in this scope

[bdaehlie]

When building servo's copy of rust (pretty recent merge) on OS X 10.8:

llvm[5]: Compiling NeonEmitter.cpp for Release+Asserts build
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp: In function ‘void ParseTypes(llvm::Record_, std::string&, llvm::SmallVectorImplllvm::StringRef&)’:
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp:249: error: ‘TGError’ was not declared in this scope
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp: In member function ‘void::NeonEmitter::emitIntrinsic(llvm::raw_ostream&, llvm::Record_)’:
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp:1384: error: ‘TGError’ was not declared in this scope
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp: In member function ‘void::NeonEmitter::runHeader(llvm::raw_ostream&)’:
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp:1459: error: ‘TGError’ was not declared in this scope
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp:1504: error: ‘TGError’ was not declared in this scope
/Users/josh/src/mozilla/bdaehlie-servo/src/rust/src/llvm/tools/clang/utils/TableGen/NeonEmitter.cpp:1603: error: ‘TGError’ was not declared in this scope
make[5]: *** [/Users/josh/src/mozilla/bdaehlie-servo/build/src/rust/llvm/x86_64-apple-darwin/tools/clang/utils/TableGen/Release+Asserts/NeonEmitter.o] Error 1

[bdaehlie]

Seems like TGError was supposed to be in the included file "llvm/TableGen/Record.h", but it's not there.

[catamorphism]

I've noticed that if I just type make check again after getting this error, the build system happily goes on to build Rust. It should still be fixed, though!

[utkarshkukreti]

👍 I was getting the same error, and @catamorphism's solution worked for me too.

[catamorphism]

This is still happening, and should be fixed. Nominating for milestone 5, production-ready. (Though hopefully it'll get fixed sooner!)

[acertain]

make check doesn't fix it for me.

[acertain]

Now make check seems to have fixed it...

[catamorphism]

Still happening, 040ac2a

[catamorphism]

Still an issue as of 680eb71

[pkgw]

Turns out this is due to having stale submodules in a build tree -- fresh checkouts don't even include clang anymore.

cd ${srcdir}
rm -rf src/llvm/tools/clang
rm -rf src/llvm/projects/compiler-rt # also extraneous, also likely to be present
rm -rf .git/modules/src/llvm/modules
cd ${builddir}
rm -rf llvm/*/tools/clang
rm -rf llvm/*/projects/compiler-rt

That fixes things up for me.

[graydon]

just a bug, removing milestone/nomination.

[emberian]

This still happens sometimes. It's a race in one of the build systems, somewhere.

[emberian]

Can usually be fixed by rerunning make.

[alexcrichton]

Closing, I think that LLVM has long since fixed this, or long since changed. I haven't seen this recently.