[swift-dev] Build failing on CMakeTestCCompiler.cmake

[William Dillon]

What if you try:

which ld

And, what’s your PATH?

On December 8, 2016 at 2:19:20 PM, Frederick Kellison-Linn (fred.kl at me.com) wrote:

Yeah that seems wrong to me as well. Do you know how I can change the linker that clang invokes?

Freddy

On Dec 8, 2016, at 5:16 PM, William Dillon <william at housedillon.com> wrote:

The Apple folks might know better and correct me, but I’m pretty certain you don’t want to be using any toolchains in /opt/local.  It all needs to be from the Xcode.app.

- Will

On December 8, 2016 at 2:14:42 PM, Frederick Kellison-Linn via swift-dev (swift-dev at swift.org) wrote:

The output of those commands follows:

$ xcode-select -p
/Applications/Xcode.app/Contents/Developer

$ xcodebuild -version
Xcode 8.1
Build version 8B62

Both look fine to me.

It appears that clang is invoking /opt/local/bin/ld, and running /opt/local/bin/ld -v gives:

@(#)PROGRAM:ld  PROJECT:ld64-264.3.102
configured to support archs: i386 x86_64 x86_64h armv6 armv7 armv7s armv7m armv7k arm64 (tvOS)
LTO support using: LLVM version 3.8.1

What is wrong with the config here?

Freddy
 
On Dec 8, 2016, at 4:28 PM, William Dillon <william at housedillon.com> wrote:

I think Greg is right.  I’ve seen this before, and the way I fixed it was by fixing the Xcode configuration, specifically relating to the command-line tools.

- Will

On December 8, 2016 at 1:24:59 PM, Greg Parker via swift-dev (swift-dev at swift.org) wrote:


On Dec 8, 2016, at 7:28 AM, Frederick Kellison-Linn via swift-dev <swift-dev at swift.org> wrote:

Hello,

I have been attempting to build Swift, but have been running into issues near the end of the build. Specifically, CMake fails on the step [2112/2254] Performing configure step for 'compiler-rt’, since the compiled clang fails to build a simple C program. The specific issue appears to be at the lines:

ld: unexpected token: !tapi-tbd-v2 file
  '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib/libSystem.tbd'
  for architecture x86_64

My system settings are as follows:

MacBook Pro (Retina, Mid 2012)
macOS Sierra Version 10.12.2 Beta (16C48b)
Xcode Version 8.1 (8B62)
    |----clang/clang++: Apple LLVM version 8.0.0 (clang-800.0.42.1)

  /Users/freddy/Development/swift/swift-source/build/Ninja-RelWithDebInfoAssert/llvm-macosx-x86_64/./bin/clang
  -isysroot
  /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
  -Wl,-search_paths_first -Wl,-headerpad_max_install_names
  CMakeFiles/cmTC_b980a.dir/testCCompiler.c.o -o cmTC_b980a && :

  ld: unexpected token: !tapi-tbd-v2 file
  '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib/libSystem.tbd'
  for architecture x86_64

That error sounds like the build is trying to use an old linker that does not understand the format of the current SDK's files.

Xcode 8.1 (8B62) should be fine. If the problem is an old linker then it is most likely coming from some other install of Xcode on your machine.

What is the output of `xcode-select -p` and `xcodebuild -version`? If those are pointing at some other install of Xcode then you can use `xcode-select -s` to tell the command-line tools which copy of Xcode to use.

You can also re-run the failing clang command by hand and add -### to its arguments. clang will then print the full path to the linker it is running.


-- 
Greg Parker     gparker at apple.com     Runtime Wrangler


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