Thank you Barry! Backported the patch to 3.16.0 and tested! I'll try to integrate downstream in Gentoo (https://bugs.gentoo.org/827185).
Fabio > Il 26/11/2021 05:15 Barry Smith <bsm...@petsc.dev> ha scritto: > > > > I have made a branch barry/2021-11-25/feature-fftw-seq > https://gitlab.com/petsc/petsc/-/merge_requests/4604 that provides support > for using FFTW without MPI, please let us know if you have difficulties with > it. > > > Barry > > > > > > On Nov 25, 2021, at 5:15 AM, Fabio Rossi via petsc-users > > <petsc-users@mcs.anl.gov> wrote: > > > > > > I am trying to compile petsc with the following options (Gentoo build > > system): > > > > ./configure --prefix=/usr --build=x86_64-pc-linux-gnu > > --host=x86_64-pc-linux-gnu --mandir=/usr/share/man > > --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc > > --localstatedir=/var/lib --libdir=/usr/lib64/petsc/lib64 scrollOutput=1 > > FFLAGS=-O2 -pipe -fPIC CFLAGS=-march=core2 -O2 -pipe -fPIC > > CXXFLAGS=-march=core2 -O2 -pipe -fPIC LDFLAGS=-Wl,-O1 -Wl,--as-needed > > --prefix=/usr/lib64/petsc --with-shared-libraries --with-single-library > > --with-clanguage=c --with-petsc-arch=linux-gnu-c-opt > > --with-precision=double --with-gnu-compilers --with-blas-lapack-lib=-lblas > > -llapack --with-debugging=0 --with-mpi=0 --with-cc=x86_64-pc-linux-gnu-gcc > > --with-cxx=x86_64-pc-linux-gnu-g++ --with-fortran=1 > > --with-fc=x86_64-pc-linux-gnu-gfortran --with-mpi-compilers=0 > > --with-scalar-type=real --with-windows-graphics=0 --with-matlab=0 > > --with-cmake:BOOL=1 --with-pthread=1 --with-afterimage=0 --without-hdf5 > > --with-hypre=0 --without-suitesparse --with-superlu=0 --with-x --with-x11 > > --with-ptscotch=0 > > --with- > > scalapack=0 --without-mumps --with-imagemagick=0 --with-python=0 > > --with-boost --with-fftw > > > > so MPI support is disabled, and I get the following configure error: > > > > TESTING: consistencyChecks from > > config.packages.fftw(/var/tmp/portage/sci-mathematics/petsc-3.15.0/work/petsc-3.15.0/config/BuildSystem/config/package.py:963) > > TESTING: checkDependencies from > > config.packages.fftw(/var/tmp/portage/sci-mathematics/petsc-3.15.0/work/petsc-3.15.0/config/BuildSystem/config/package.py:872) > > ******************************************************************************* > > UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for details): > > ------------------------------------------------------------------------------- > > Did not find package MPI needed by fftw. > > Enable the package using --with-mpi > > > > Isn't MPI optional? Where is the error coming from? > > > > If I disable fftw then it compiles successfully. > > > > Fabio >
