Are you actually using the GCC from the devtoolset or the default one? Cmake tells you at the very beginning which compiler it is using.
Roland > -----Original Message----- > From: gromacs.org_gmx-users-boun...@maillist.sys.kth.se <gromacs.org_gmx- > users-boun...@maillist.sys.kth.se> On Behalf Of Shlomit Afgin > Sent: Wednesday, January 15, 2020 12:51 AM > To: gmx-us...@gromacs.org > Subject: [gmx-users] Error: Cannot find AVX 512F compiler flag > > > Hi, > I tried to install GROMACS 2019.5 on CentOS7, cmake .. - > DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=ON > > I have already installed devtoolset-6 and still get this error: > > -- Performing Test CXX_COMPILE_WORKS_WITHOUT_SPECIAL_FLAGS > -- Performing Test CXX_COMPILE_WORKS_WITHOUT_SPECIAL_FLAGS - Failed > -- Could not find any flag to build test source (this could be due to either > the > compiler or binutils) > -- Could not identify number of AVX-512 units - detection program missing > compilation prerequisites > -- Could not run code to detect number of AVX-512 FMA units - assuming 2. > -- Detected best SIMD instructions for this CPU - AVX_512 CMake Error at > cmake/gmxManageSimd.cmake:51 (message): > Cannot find AVX 512F compiler flag. Use a newer compiler, or choose a > lower level of SIMD (slower). > Call Stack (most recent call first): > cmake/gmxManageSimd.cmake:186 > (gmx_give_fatal_error_when_simd_support_not_found) > CMakeLists.txt:719 (gmx_manage_simd) > > > Thanks, > Shlomit > -- > Gromacs Users mailing list > > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a > mail to gmx-users-requ...@gromacs.org. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
