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zhongxiang117/gmx-compile-avx2-not-support.md

Created April 19, 2022 10:21
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GROMACS-Compiling
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gmx-compile-avx2-not-support.md

when compiling GROMACS, there possibly might be an error:

~/gmxpath/build/gromacs/src/double/src/external/build-fftw/fftwBuild-prefix/src/fftwBuild/simd-support/simd-avx2.h:43:2: error: #error "compiling simd-avx2.h without avx2 support"

By refering to this post: https://bbs.archlinux.org/viewtopic.php?id=250244

I know this is caused by the conflicts of -march of cc compiler.

Reading this manual for detail info: gcc options

Thus to solve it, simply remove the corresponding flags inside Makefile will make the problem gone.

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