[CMake] cmake with intel compilers

[burlen]

On 09/24/2012 07:04 AM, Bill Hoffman wrote:
> On 9/23/2012 4:29 PM, Burlen Loring wrote:
>> hmmm, I was a bit hasty in concluding that the issue has gone away in
>> newer releases. on another system, I have the issue with cmake 2.8.8.
>> The intel compiler version there is 11.1. On this system if I don't
>> include $INTEL_ROOT/include/intel64 explicitly , gcc's xmm intrinsics
>> are found causing errors (typical error follows).  Examining the output
>> of make VERBOSE=1, I'm not seeing any reference to the path containing
>> either gcc or intel xmm intrinsics. Is this a cmake issue? or perhaps a
>> configuration issue with the intel compiler on this system?
>>
>> /usr/lib64/gcc/x86_64-suse-linux/4.3/include/xmmintrin.h(105): error:
>> identifier "__builtin_ia32_addss" is undefined
>>      return (__m128) __builtin_ia32_addss ((__v4sf)__A, (__v4sf)__B);
>
> Does the compiler work from the command line with CMake?
>
>
Using the compiler without cmake, I do need to include the extra path to 
prevent gcc's intrinsics from being found. Looks like this is on the 
intel side of things. Of the two systems I've tested recently the system 
with intel 11.1 has the issue, while the system with intel 12.1 does 
not, both with cmake 2.8.8. As far as I can see both gcc and intel 
compilers are configured similarly on these systems with both compilers 
providing xmm intrinsics header. Apparently in the older intel compiler 
gcc's directory was searched first, and thus erroneously finding the gcc 
intrinsics. Apparently the newer version of the intel compiler is 
searching its directories first. There's hope that the issue is solved 
going forward, and probably not worth worrying about in cmake...