clang/llvm emit call to compiler_rt not present in libSystem (_mulodi4 for instance)

Clang Frontend
#1

Hello,

I see that recently clang started to emit call to new symbols from compiler-rt that are unfortunately not available in libSystem on Mac OS 10.6.
So, to be able to link such code, the new osx variant of the compiler-rt library is required.

Maybe emitting such code should be made optional to prevent this dependency, but in the meantime, I attach a patch that tells clang to build and use libclang_rt.osx.a when possible.

-- Jean-Daniel

libosx.patch (4.24 KB)

#2

Hello,

I see that recently clang started to emit call to new symbols from compiler-rt that are unfortunately not available in libSystem on Mac OS 10.6.
So, to be able to link such code, the new osx variant of the compiler-rt library is required.

Yep.

Maybe emitting such code should be made optional to prevent this dependency,

You'd have just crashed. :slight_smile:

but in the meantime, I attach a patch that tells clang to build and use libclang_rt.osx.a when possible.

This looks reasonable. Do you need someone to apply this for you?

-eric

#3

Please, I don't have commit access.

-- Jean-Daniel

#4

This looks reasonable. Do you need someone to apply this for you?

Please, I don't have commit access.

Done here:

[issola:llvm/tools/clang] echristo% svn ci
Sending lib/Driver/ToolChains.cpp
Sending lib/Driver/ToolChains.h
Sending runtime/compiler-rt/Makefile
Transmitting file data ...
Committed revision 133624.

Thanks for the patch!

-eric

#5

Thanks you :slight_smile:

-- Jean-Daniel