[gmx-users] compilation error with gcc in non-standard location

[Carsten Kutzner]

Hi,

On 26 Mar 2014, at 14:21, michael.b <mbx0009 at yahoo.com> wrote:

> Hi,
> 
> trying to install gmx-4.6.5 i use cmake as in
> 
> CMAKE_PREFIX_PATH=/home/micb/local cmake ../gromacs-4.6.5 -DGMX_GPU=OFF
> -DGMX_MPI=OFF -DCMAKE_INSTALL_PREFIX=/home/micb/local
> -DGMX_BUILD_OWN_FFTW=ON -DCMAKE_CPU_ACCELERATION=SSE2
I think it needs to be GMX_CPU_ACCELERATION instead of CMAKE_…

Carsten

> 
> this gives me:
> [...]
> -- Performing Test GNU_SSE4_CFLAG
> -- Performing Test GNU_SSE4_CFLAG - Failed
> CMake Warning at CMakeLists.txt:708 (message):
>  No C SSE4.1 flag found.  Consider a newer compiler, or use SSE2 for
>  slightly lower performance
> -- Looking for smmintrin.h
> -- Looking for smmintrin.h - not found
> CMake Error at CMakeLists.txt:731 (message):
>  Cannot find smmintrin.h, which is required for SSE4.1 intrinsics support.
> -- Configuring incomplete, errors occurred!
> 
> i get the same kind of error both with and w/o the
> -DCMAKE_CPU_ACCELERATION=SSE2 flag.
> 
> i believve the problem might be that i try using a gcc that is not in the
> standard
> location. Because gcc-4.8 was not available on the machine in question (a
> rocks cluster)
> i installed gcc-4.8 with the prefix /home/micb/local and set the PATH so
> that gcc, g++, etc
> version 4.8 are used ...  smmintrin.h is actually there but it is in:
> /home/micb/local/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/include
> and even if i precede the cmake command by:
> CMAKE_INCLUDE_PATH=/home/micb/local/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/include
> i get exactly the same error ...
> what am i missing?
> 
> thanks!
> michael
> 
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