[petsc-users] Installation without BLAS/LAPACK

[Smith, Barry F.]

> On Feb 20, 2018, at 10:41 AM, Ali Berk Kahraman <aliberkkahraman at yahoo.com> wrote:
> 
> When I call --download-blaslapack, what does it do exactly? Where does it install the library? Does it touch anything anything else (such as updating versions of mpicc) ? My concern is that if I call download-blaslapack I will "change" some stuff in the /usr/bin directory that might disable some other program, package installed on the computer.

  It puts everything in your PETSC_DIR and does not, nor could not change anything in /usr

   Barry

> 
> 
> On 20-02-2018 19:34, Satish Balay wrote:
>> On Tue, 20 Feb 2018, Ali Berk Kahraman wrote:
>> 
>>> Hello All,
>>> 
>>> I have access to a common computer in my school, and I want to use petsc on
>>> it. The problem is that I do not have root access, and neither do I want it.
>>> The machine has OpenMPI installed in it, but no BLAS. Can I configure petsc
>>> somehow without having any BLAS commands? If not, can I install BLAS somehow
>>> only on my own folder (/home/myfolder) without touching anything inside /usr/
>>> folder?
>> You don't need root access to install/use PETSc.
>> 
>> And you can ask petsc configure to install any required or missing packages.
>> 
>> ./configure CC=gcc FC=gfortran CXX=g++ --download-blaslapack --download-mpich
>> make
>> 
>> If you wish to install PETSc with a preinstalled mpi - you can do:
>> 
>> ./configure CC=mpicc FC=mpif90 CXX=mpicxx --download-blaslapack
>> make
>> 
>> Satish
>