BUILD_SHARED_LIBS build

[Khilan Gudka]

I mean for when compiling under FreeBSD.


--
Khilan Gudka
Research Associate
Security Group
Computer Laboratory
University of Cambridge
http://www.cl.cam.ac.uk/~kg365/

On 24 November 2014 at 10:24, Khilan Gudka <Khilan.Gudka at cl.cam.ac.uk>
wrote:

> Hi Rafael
>
> I'm also experiencing this with FreeBSD's linker (10.0-RELEASE-p12).
> Applying your patch resolves the issue. Would it make sense to commit the
> patch?
>
> Thanks
>
> --
> Khilan Gudka
> Research Associate
> Security Group
> Computer Laboratory
> University of Cambridge
> http://www.cl.cam.ac.uk/~kg365/
>
> On 5 November 2014 at 17:41, Rafael Espíndola <rafael.espindola at gmail.com>
> wrote:
>
>> > The reduced testcase is attached. Build it with
>> >
>> > gcc test3.c -fPIC -shared -o test3.so
>> > gcc test2.c -fPIC -shared -o test2.so test3.so
>> > gcc test.c -o test test2.so -fuse-ld=gold # works
>> > gcc test.c -o test test2.so -fuse-ld=bfd #fails
>> >
>> > Maybe we should just require a non-broken linker for BUILD_SHARED_LIBS?
>>
>> Good news is that bfd ld has a command line option to enable the sane
>> behavior, so we should be able to just use the attached patch. With it
>> we get fewer bogus dependencies. For example, we go from
>>
>> build
>> lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AggressiveAntiDepBreaker.cpp.o:
>> CXX_COMPILER
>> /home/espindola/llvm/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
>> || include/llvm/IR/intrinsics_gen lib/libLLVMSupport.so
>> lib/libLLVMCore.so lib/libLLVMBitReader.so
>> lib/libLLVMTransformUtils.so lib/libLLVMInstCombine.so
>> lib/libLLVMScalarOpts.so lib/libLLVMipa.so lib/libLLVMAnalysis.so
>> lib/libLLVMMCParser.so lib/libLLVMMC.so lib/libLLVMObject.so
>> lib/libLLVMTarget.so lib/libLLVMProfileData.so
>>
>> to
>>
>> build
>> lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AggressiveAntiDepBreaker.cpp.o:
>> CXX_COMPILER
>> /home/espindola/llvm/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
>> || include/llvm/IR/intrinsics_gen lib/libLLVMSupport.so
>> lib/libLLVMCore.so lib/libLLVMTransformUtils.so
>> lib/libLLVMScalarOpts.so lib/libLLVMAnalysis.so lib/libLLVMMC.so
>> lib/libLLVMTarget.so
>>
>> Cheers,
>> Rafael
>>
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>>
>>
>
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