> Configure Options: --configModules=PETSc.Configure > --optionsModule=config.compilerOptions CFLAGS=-std=c99 --with-cc=mpicc > --with-cxx=g++ --download-fblaslapack=yes --download-hypre=yes -with-x=0 > --with-c++support=yes --with-mpi=yes --with-hypre=yes --prefix=/petsc > --with-c2html=0 --with-ssl=0
Try: ./configure CFLAGS=-std=c99 --with-cc=mpicc --with-cxx=mpicxx --with-fc=mpif90 --download-fblaslapack=yes --download-hypre=yes -with-x=0 --with-c2html=0 --with-ssl=0 Satish On Thu, 4 Aug 2022, Simon Zhang wrote: > I do have mpicc installed and have CFLAGS=-std=c99 but I'm still unable to > configure. > > On Thu, Aug 4, 2022 at 12:21 PM Satish Balay <ba...@mcs.anl.gov> wrote: > > > > gcc (Ubuntu 4.8.4-2ubuntu1~14.04.4) 4.8.4 > > > > Do you have a newer gcc version available for use on this machine? > > > > >>>>>> > > /tmp/petsc-7thm2vwz/config.setCompilers/conftest.c: At top level: > > cc1: warning: unrecognized command line option "-Wno-lto-type-mismatch" > > [enabled by default] > > > > Rejecting compiler flag -std=c99 due to > > <<<<<< > > > > Hm - looks configure logic here is failing. > > > > -Wno-lto-type-mismatch checked went through earlier [so this flag was > > accepted] - but then when a test is retried with "-Wno-lto-type-mismatch > > -std=c99" its failing > > > > Perhaps one way to work around is to use configure option: CFLAGS=-std=c99 > > > > But its better to use a more recent gcc than 4.8.4 > > > > Satish > > > > On Thu, 4 Aug 2022, Simon Zhang wrote: > > > > > On Thu, Aug 4, 2022 at 10:05 AM Satish Balay <ba...@mcs.anl.gov> wrote: > > > > > > > please send the corresponding configure.log > > > > > > > > Satish > > > > > > > > On Thu, 4 Aug 2022, Simon Zhang wrote: > > > > > > > > > To whom it may concern, > > > > > > > > > > I'm trying to install PETSc on my computer and PETSc is compliant > > with > > > > GCC > > > > > but something keeps going wrong at the compilation step. It's > > returning > > > > the > > > > > following message. > > > > > > > > > > PETSc requires c99 compiler! Configure could not determine compatible > > > > > compiler flag. > > > > > > > > > > How can I fix this problem? > > > > > > > > > > Thank you, > > > > > Simon Zhang > > > > > > > > > > > > > > > > > > > > >
