# Build error with #error "compiling simd-avx.h without -mavx" **URL:** \ **Category:** User discussions\ **Created:** [May 20, 2024, 12:26pm UTC](https://gromacs.bioexcel.eu/t/build-error-with-error-compiling-simd-avx-h-without-mavx/9181 "2024-05-20T12:26:34Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Jingya](https://avatars.discourse-cdn.com/v4/letter/j/848f3c/32.png) [@Jingya](https://gromacs.bioexcel.eu/u/Jingya)\ **Post date:** [May 20, 2024, 12:26pm UTC](https://gromacs.bioexcel.eu/t/build-error-with-error-compiling-simd-avx-h-without-mavx/9181/1 "2024-05-20T12:26:34Z")
GROMACS version: 2021-swaxs-0.5.1 GROMACS modification: No Here post your question I installed gromacs with following commands cmake -DGMX\_BUILD\_OWN\_FFTW=ON -DCMAKE\_INSTALL\_PREFIX="{DIR}" -S “{DIR}-src" -B "{DIR}-build” cmake --build "{DIR}-build" --target install -j $(nproc) I get the errors while running cmake build. Any ideas I can resolve it? Many Thanks! from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/n1fv\_5.c:3: /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/simd-support/simd-avx.h:39:2: error: #error “compiling simd-avx.h without -mavx” 39 | #error “compiling simd-avx.h without -mavx” | ^ ~~~~ In file included from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/n1f.h:21, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/…/common/n1fv\_2.c:71, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/n1fv\_2.c:3: /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/simd-support/simd-avx.h:39:2: error: #error “compiling simd-avx.h without -mavx” 39 | #error “compiling simd-avx.h without -mavx” | ^ ~~~~ In file included from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/n1f.h:21, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/…/common/n1fv\_4.c:82, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/n1fv\_4.c:3: /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/simd-support/simd-avx.h:39:2: error: #error “compiling simd-avx.h without -mavx” 39 | #error “compiling simd-avx.h without -mavx” | ^ ~~~~ In file included from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/n1f.h:21, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/…/common/n1fv\_3.c:78, from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/avx/n1fv\_3.c:3: /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/simd-support/simd-avx.h:39:2: error: #error “compiling simd-avx.h without -mavx” 39 | #error “compiling simd-avx.h without -mavx” | ^ ~~~~ In file included from /root/jyou/gromacs-swax-build/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/dft/simd/n1f.h:21, … gmake[3]: \*\*\* [all] Error 2 gmake[2]: \*\*\* [src/external/build-fftw/fftwBuild-prefix/src/fftwBuild-stamp/fftwBuild-build] Error 2 gmake[1]: \*\*\* [src/external/build-fftw/CMakeFiles/fftwBuild.dir/all] Error 2 gmake: \*\*\* [all] Error 2 ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [May 22, 2024, 8:43am UTC](https://gromacs.bioexcel.eu/t/build-error-with-error-compiling-simd-avx-h-without-mavx/9181/2 "2024-05-22T08:43:52Z")
What architecture are you using? Is there a reason why you are not using a more recent version of GROMACS?