[petsc-dev] p4est w/o MPI

[Satish Balay]

MPI pacakge is a bit weird compared to others [as it does this funny thing with MPIUNI].

For regular packages - I guess I would use 'if package.found'

I guess I should create an MR with this diff.

Satish

----

diff --git a/config/BuildSystem/config/packages/p4est.py b/config/BuildSystem/config/packages/p4est.py
index e7108b0ab8..40d6797f02 100644
--- a/config/BuildSystem/config/packages/p4est.py
+++ b/config/BuildSystem/config/packages/p4est.py
@@ -24,14 +24,16 @@ class Configure(config.package.GNUPackage):
     self.blasLapack = framework.require('config.packages.BlasLapack',self)
     self.zlib       = framework.require('config.packages.zlib',self)
     self.memalign   = framework.argDB['with-memalign']
-    self.deps       = [self.mpi,self.blasLapack,self.zlib]
+    self.deps       = [self.blasLapack,self.zlib]
+    self.odeps      = [self.mpi]
     return
 
   def formGNUConfigureArgs(self):
     args = config.package.GNUPackage.formGNUConfigureArgs(self)
     if self.argDB['with-p4est-debugging']:
       args.append('--enable-debug')
-    args.append('--enable-mpi')
+    if not self.mpi.usingMPIUni:
+      args.append('--enable-mpi')
     args.append('CPPFLAGS="'+self.headers.toStringNoDupes(self.dinclude)+'"')
     args.append('LIBS="'+self.libraries.toString(self.dlib)+'"')
     args.append('--enable-memalign='+self.memalign)

On Fri, 16 Apr 2021, Isaac, Tobin G wrote:

> Matt, this is the configure logic I would like, but I don't know how to do it:
> - configure p4est after MPI, but do not require MPI
> - if MPI is present, add the '--enable-mpi' flack in formGNUConfigureArgs(), otherwise omit it.
> 
> ________________________________________
> From: Isaac, Tobin G <tisaac at cc.gatech.edu>
> Sent: Friday, April 16, 2021 11:03
> To: Mark Adams; For users of the development version of PETSc
> Subject: Re: [petsc-dev] p4est w/o MPI
> 
> p4est has a mode where it can compile without MPI, I don't know if PETSc is using it, will check.
> 
> ________________________________________
> From: petsc-dev <petsc-dev-bounces at mcs.anl.gov> on behalf of Mark Adams <mfadams at lbl.gov>
> Sent: Friday, April 16, 2021 10:23
> To: For users of the development version of PETSc
> Subject: [petsc-dev] p4est w/o MPI
> 
> I don't have MPI (Fugaku w/ gcc) and p4est seems to need it. Is there a work around?
> Thanks,
> Mark
>