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

[Christian Wagner]

To set the CPU acceleration to SSE2, I used -DGMX_CPU_ACCELERATION=SSE2 
Not: - DCMAKE _CPU_ACCELERATION=SSE2, GMX _CPU_ACCELERATION 

Chris 
----- Original Message -----

> From: "Carsten Kutzner" <ckutzne at gwdg.de>
> To: gmx-users at gromacs.org
> Sent: Wednesday, March 26, 2014 9:36:06 PM
> Subject: Re: [gmx-users] compilation error with gcc in non-standard
> location

> 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
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> > View this message in context:
> > http://gromacs.5086.x6.nabble.com/compilation-error-with-gcc-in-non-standard-location-tp5015385.html
> > Sent from the GROMACS Users Forum mailing list archive at
> > Nabble.com.
> > --
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