<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I see that in our Linux builds clang complains that it does not support the swiftcall attribute.<div class=""><br class=""></div><div class=""><div class=""> In file included from /home/buildnode/jenkins/workspace/swift-PR-Linux/branch-master/swift/unittests/runtime/Metadata.cpp:13:</div><div class=""> /home/buildnode/jenkins/workspace/swift-PR-Linux/branch-master/swift/include/swift/Runtime/Metadata.h:3015:1: warning: unknown attribute 'swiftcall' ignored [-Wunknown-attributes]</div><br class="Apple-interchange-newline">How bad is this? Do we not use a custom calling convention on Linux platforms today?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">-- </div><div class="">Greg Parker <a href="mailto:gparker@apple.com" class="">gparker@apple.com</a> Runtime Wrangler</div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>