llvm dev - May 2020 - Ld64.lld cannot find Foundation framework

Thanks for your reply.  Two questions:
1). Will ld64.lld be fixed in LLVM v11.0 and when is this likely to be?
2). You mention Apple’s linker, by which I assume you mean GNU’s ld.
	Is it possible to get a binary version of ld (preferably that does not use
other things from /usr/bin)?

Thanks

> On 7 May 2020, at 12:26, James Y Knight <jyknight at google.com>
wrote:
> 
> The MachO port of lld (ld64.lld) doesn't work. There is recently some
activity to start to fix this situation, but for now you need to use Apple's
linker.
> 
> On Thu, May 7, 2020, 5:36 AM Edmund Furse via llvm-dev <llvm-dev at
lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
> Dear LLVM community I need some help please.
> 
> I want to use LLVM's clang and lld within a MacOSX sandboxed app.  This
is because sandboxing does not allow calls to /usr/bin/clang.
> The clang binary works fine to compile a file, but ld64.lld comes up with
the error "cannot find framework".
> However similar arguments using /usr/bin/ld instead of ld64.lld works fine.
> 
> Here are the details:
> 
> Here is the call using /usr/bin/ld:
> 
> /usr/bin/ld HelloObjC.o -o HelloObjC  -v -sdk_version 10.14.0
-macosx_version_min 10.14.0 -demangle -lto_library
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib
-dynamic -arch x86_64 -framework Foundation -framework Cocoa -syslibroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
-lSystem
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/10.0.1/lib/darwin/libclang_rt.osx.a
-F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
> 
> This works correctly.
> 
> Here is the call using ld64.lld:
> 
>
/Users/edmundfurse/Documents/NewClang/NewClangM21b/NewClangM21/Tools/bin/ld64.lld
HelloObjC.o -o HelloObjC  -v -sdk_version 10.14.0 -macosx_version_min 10.14.0
-demangle -lto_library
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib
-dynamic -arch x86_64 -framework Foundation -framework Cocoa -syslibroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
-L/usr/local/lib -lSystem
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/10.0.1/lib/darwin/libclang_rt.osx.a
-F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
> 
> gives the error message:
> 
> Library search paths:
>    
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib
> Framework search paths:
>    
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
>    
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks
> ld64.lld: error: Unable to find framework for -framework Foundation
> 
> Any suggestions welcome.
> 
> 
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On Thu, May 7, 2020 at 1:54 PM Edmund Furse <edmund.furse at
imitation.uk.com>
wrote:
> Thanks for your reply.  Two questions:
> 1). Will ld64.lld be fixed in LLVM v11.0 and when is this likely to be?
>
Likely won't be fixed that soon.

2). You mention Apple’s linker, by which I assume you mean GNU’s
ld.
> Is it possible to get a binary version of ld (preferably that does not use
> other things from /usr/bin)?
>
No, Apple does not use GNU ld, they have their own linker, "ld64".
That's
what you ran as /usr/bin/ld on your mac.
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James, many thanks.

Is there any linker available for Macs that has a freely available binary
version?
I thought maybe that GNU’s linker might fit the bill?

I cannot use Apple’s linker from /usr/bin/ as it is not allowed to make external
calls from a sandboxed app.
Hence my interest in the LLVM lld.
> On 7 May 2020, at 19:21, James Y Knight <jyknight at google.com>
wrote:
> 
> On Thu, May 7, 2020 at 1:54 PM Edmund Furse <edmund.furse at
imitation.uk.com <mailto:edmund.furse at imitation.uk.com>> wrote:
> Thanks for your reply.  Two questions:
> 1). Will ld64.lld be fixed in LLVM v11.0 and when is this likely to be?
> 
> Likely won't be fixed that soon.
> 
> 2). You mention Apple’s linker, by which I assume you mean GNU’s ld.
> 	Is it possible to get a binary version of ld (preferably that does not use
other things from /usr/bin)?
> 
> No, Apple does not use GNU ld, they have their own linker,
"ld64". That's what you ran as /usr/bin/ld on your mac.
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