[MacPorts] #53151: ld64-latest: handeling tbd files

[MacPorts]

#53151: ld64-latest: handeling tbd files
---------------------------------+-------------------------
 Reporter:  MarcusCalhoun-Lopez  |      Owner:  jeremyhu@…
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:
 Keywords:                       |       Port:  ld64-latest
---------------------------------+-------------------------
 I am currently trying to get Qt to use MacPorts clang instead of Xcode
 clang so as to hopefully support older OSs for longer..[[BR]]
 The linker, however, does not seem to be able to handle
 [http://stackoverflow.com/questions/31450690/why-xcode-7-shows-tbd-
 instead-of-dylib tbd] files.[[BR]]
 For example, the following code fails:
 {{{
 clang++-mp-3.9
 -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
 main.cxx
 }}}
 with the error
 {{{
 ld: unexpected token: !tapi-tbd-v2 file
 '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib/libc++.tbd'
 for architecture x86_64
 }}}
 I have been able to workaround the problem by removing {{{-syslibroot}}}
 from the linker.

 The more difficult problem is when the .tbd file and dylib file are in the
 same directory as in:
 {{{
 clang++-mp-3.9
 -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks
 -weak_framework XCTest main.cxx
 }}}
 which produces the error
 {{{
 ld: unexpected token: !tapi-tbd-v2 file
 '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks/XCTest.framework/XCTest.tbd'
 for architecture x86_64
 }}}

 Any suggestions on a fix or workaround?

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Ticket URL: <https://trac.macports.org/ticket/53151>
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