[swift-dev] Build failure on s390x

Vivian Kong vivkong at ca.ibm.com
Wed Aug 10 07:18:37 CDT 2016

Thanks Jordan!  I'll create a pull request.


Vivian Kong
Software Developer
IBM Canada Toronto Lab

From:	Jordan Rose <jordan_rose at apple.com>
To:	Vivian Kong/Toronto/IBM at IBMCA
Cc:	swift-dev <swift-dev at swift.org>, Robert Widmann
            <rwidmann at apple.com>
Date:	2016/08/09 05:08 PM
Subject:	Re: [swift-dev] Build failure on s390x
Sent by:	jordan_rose at apple.com

Hi, Vivian. RuntimeStubs.h (along with the rest of SwiftShims) is a header
that gets shipped with the Swift library, so it can’t refer to anything
outside of its folder. Since we don’t yet have a good way to annotate
things as using the Swift calling convention in the SwiftShims headers, we
should probably not be using the Swift calling convention there (at least
for now). Can you write up a pull request removing the SWIFT_CC annotation
from the functions declared in RuntimeStubs.h?

(I’m a little concerned that Clang didn’t tell us that the calling
convention isn’t consistent across declarations, but that’s a separate
issue. Maybe the lack of an annotation isn’t strong enough information to
produce a warning.)


      On Aug 9, 2016, at 07:42, Vivian Kong via swift-dev <
      swift-dev at swift.org> wrote:

      After apply this commit, the s390x build started to fail:

      The commit added 2 new functions in
      stdlib/public/SwiftShims/RuntimeStubs.h. They are used in
      stdlib/public/stubs/CommandLine.cpp with SWIFT_CC(swift) macro. Since
      we use the LLVM's intrinsic "swiftcall" on s390x, this caused a build
      error. To fix it we added the SWIFT_CC(swift) macro and #include
      "swift/Runtime/Config.h" to RuntimeStubs.h. We then ran into this
      build error:

      <module-includes>:9:10: note: in file included from
      #include "RuntimeStubs.h"
      'swift/Runtime/Config.h' file not found
      #include "swift/Runtime/Config.h"

      I tried modifying stdlib/public/SwiftShims/CMakeLists.txt with


      But that didn't seem to work. Any suggestions on how to fix this?

      Thanks for your help!


      Vivian Kong
      Software Developer
      IBM Canada Toronto Lab

      swift-dev mailing list
      swift-dev at swift.org

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