Comment by Hugh Bellamy (JIRA)

What version of the compiler are you running? Can you rebase to the latest master and see if the issue still occurs

Comment by Amr Aboelela (JIRA)

I used master brach, and still getting same error. The script I am running is:
./swift/utils/build-toolchain local.swift

And I am in Linux environment, and here is the expanding running script:

========== Running script ==========
./utils/build-script: note: using preset 'buildbot_linux', which expands to

./utils/build-script --assertions --no-swift-stdlib-assertions --llbuild --swiftpm --xctest --build-subdir=buildbot_linux --lldb --release --test --validation-test --long-test --foundation --libdispatch --lit-args=-v -- --swift-enable-ast-verifier=0 --build-ninja --install-swift --install-lldb --install-llbuild --install-swiftpm --install-xctest --install-prefix=/usr '--swift-install-components=autolink-driver;compiler;clang-builtin-headers;stdlib;swift-remote-mirror;sdk-overlay;license' --build-swift-static-stdlib --build-swift-static-sdk-overlay --build-swift-stdlib-unittest-extra --test-installable-package --install-destdir=/home/amr/swift/swift/swift-nightly-install --installable-package=/home/amr/swift/swift/swift-LOCAL-2017-03-03-a-osx.tar.gz --install-foundation --install-libdispatch --reconfigure

Comment by Amr Aboelela (JIRA)

This is what i got till now:

~/swift/build/buildbot_linux$ du -sh *
2.6M    cmark-linux-x86_64
492K    libdispatch-linux-x86_64
1.5G    llvm-linux-x86_64
21M ninja-build
1.4G    swift-linux-x86_64

Comment by Amr Aboelela (JIRA)

I am using Ubuntu 15.10

cc @eeckstein, @ematejska

Comment by Christopher Hatton (JIRA)

I got the same error, Ubuntu 15.10.

My build folder:
user@ubuntu:~/Projects/swift-source/build/Ninja-RelWithDebInfoAssert$ du -sh * 5.1M cmark-linux-x86_64 492K libdispatch-linux-x86_64 24G llvm-linux-x86_64 25G swift-linux-x86_64

I invoked build with build-script -r -t. Is the build folder supposed to occupy ~50GB?

Comment by Amr Aboelela (JIRA)

Hi Christopher
Yes exactly like me 🙂
I used Ubuntu 15.10 because they said we need it for Android. And same with me, now I am using Ubuntu 16.04 and it is building fine. So they need to support Ubuntu 16.04 for Android or fix compilation in Ubuntu 15.10

On Mar 8, 2017, at 3:58 AM, Christopher Hatton <christopherhattonuk@gmail.com> wrote:

Hi Amr,

I saw that 4 days ago you experienced the same issue as me, building Swift on Ubuntu 15.10.

I wonder if you found a fix?

Perhaps like me you were using Ubuntu 15.10 because this is specifically instructed, to build Swift for Android, which was my goal.

If no fix is forthcoming I may have to try Android build on Ubuntu 16.04.

Trying these things out seems to take an awful lot of resources and time on my MacBook Pro though

Best regards,
Chris

Comment by Jose Rojas (JIRA)

I encountered this today while building Swift on Ubuntu 16.04 (using a docker container). See the console output for more details.

[3/36] Linking CXX executable bin/swift-reflection-dump
FAILED: : && /usr/bin/clang++ -Wno-unknown-warning-option -Werror=unguarded-availability-new -fno-stack-protector -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -fcolor-diagnostics -ffunction-sections -fdata-sections -Werror=switch -Wdocumentation -Wimplicit-fallthrough -Wunreachable-code -Woverloaded-virtual -DOBJC_OLD_DISPATCH_PROTOTYPES=0 -O3 "-L/swift-source/build/Ninja-ReleaseAssert/swift-linux-x86_64/./lib/swift/linux" -target x86_64-unknown-linux-gnu -lpthread -latomic -ldl -fuse-ld=gold tools/swift-reflection-dump/CMakeFiles/swift-reflection-dump.dir/swift-reflection-dump.cpp.o -o bin/swift-reflection-dump -L/swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/./lib -lswiftReflection /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMObject.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMSupport.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMBitReader.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMCore.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMBinaryFormat.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMMCParser.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMMC.a /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMSupport.a -lrt -ldl -ltinfo -lpthread -lz -lm /swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/lib/libLLVMDemangle.a -Wl,-rpath,/swift-source/build/Ninja-ReleaseAssert/llvm-linux-x86_64/./lib && :
tools/swift-reflection-dump/CMakeFiles/swift-reflection-dump.dir/swift-reflection-dump.cpp.o:/swift-source/swift/tools/swift-reflection-dump/swift-reflection-dump.cpp:function swift::remote::TypeDecoder<swift::reflection::TypeRefBuilder>::decodeMangledType(swift::Demangle::Node* const&): error: undefined reference to 'swift::Demangle::mangleNode(swift::Demangle::Node* const&)'
tools/swift-reflection-dump/CMakeFiles/swift-reflection-dump.dir/swift-reflection-dump.cpp.o:/swift-source/swift/tools/swift-reflection-dump/swift-reflection-dump.cpp:function swift::remote::TypeDecoder<swift::reflection::TypeRefBuilder>::decodeMangledType(swift::Demangle::Node* const&): error: undefined reference to 'swift::Demangle::mangleNode(swift::Demangle::Node* const&)'
tools/swift-reflection-dump/CMakeFiles/swift-reflection-dump.dir/swift-reflection-dump.cpp.o:/swift-source/swift/tools/swift-reflection-dump/swift-reflection-dump.cpp:function swift::remote::TypeDecoder<swift::reflection::TypeRefBuilder>::decodeMangledNominalType(swift::Demangle::Node* const&, llvm::Optional<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, swift::reflection::TypeRef const*&): error: undefined reference to 'swift::Demangle::mangleNode(swift::Demangle::Node* const&)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
root@ea9f25bc95bf:/swift-source/swift# nm -lA --demangle ../build/Ninja-ReleaseAssert/swift-linux-x86_64/lib/swift/linux/libswiftReflection.a | grep mangleNode
../build/Ninja-ReleaseAssert/swift-linux-x86_64/lib/swift/linux/libswiftReflection.a:TypeRefBuilder.cpp.o: U swift::Demangle::mangleNode[abi:cxx11](swift::Demangle::Node* const&) /swift-source/swift/stdlib/public/Reflection/TypeRefBuilder.cpp:0
../build/Ninja-ReleaseAssert/swift-linux-x86_64/lib/swift/linux/libswiftReflection.a:Remangler.cpp.o:0000000000000000 T swift::Demangle::mangleNode[abi:cxx11](swift::Demangle::Node* const&)
root@ea9f25bc95bf:/swift-source/swift# lsb_release -r
Release: 16.04

Comment by Jose Rojas (JIRA)

I tried running the command:

./swift/utils/build-toolchain local.swift

And the outcome was the same... undefined symbol error while building 'bin/swift-reflection-dump'.

I'm reopening this issue.

Comment by Jose Rojas (JIRA)

I double checked my settings and it looks like I had an incompatible version of cmake installed (3.5.2 instead of 3.5.1).

Reverting to the correct version solved the build issue.

Apologies for any spam on this.