[LLVMdev] llvmgcc-4.2 llvmg++-4.2 on OS X -- missing GCC __builtin intrinsics

[kent williams]

I didn't file a bug because as it turns out the problem isn't LLVM,
it's gcc-xml which is part of the CableSwig package.
gcc-xml picked up on the __llvm__ symbol and defined it when it
'compiled' C++ files.  Since __llvm__ was defined, but gcc-xml doesn't
know anything about llvm intrinsic functions, it threw an error.

The gcc-xml guys at Kitware are working on fixing this.

On Mon, Aug 30, 2010 at 11:29 AM, Duncan Sands <baldrick at free.fr> wrote:
> Hi Kent, I suggest you open a bug report with a preprocessed testcase.
>
> Best wishes,
>
> Duncan.
>
>> I've had good luck using the llvm-gcc&  llvm-g++ on small projects,
>> but I just discovered that it's apparently missing some of the GCC
>> intrinsic functions -- specifically, when I try and compile VXL
>> (http://vxl.sourceforge.net) it dies when it encounters
>> __builtin_bswap32 .
>>
>> This is on OS X with the llvm-gcc-4.2&  llvm_g++-42 that are part of
>> the XCode 3.2.3
>>
>> I don't know if this was the LLVM-GCC developer's oversight or Apple's
>>   but it keeps me from using llvm-gcc as my default compiler.
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