[petsc-dev] [Mike McQuaid] Re: [Homebrew/homebrew-core] PETSc: import from homebrew-science (#23598)

[Smith, Barry F.]

> On Feb 25, 2018, at 9:59 PM, Balay, Satish <balay at mcs.anl.gov> wrote:
> 
> On Mon, 26 Feb 2018, Smith, Barry F. wrote:
> 
>>> PETSc --download-* is a package manager, albeit very crufty (though it
>>> gets the job done).  Basically all package managers function by
>>> installing with a private DESTDIR, bundling up the result, then
>>> unpacking into the target.
>> 
>>   That's not how PETSc's works. It tells the each package the final prefix and each package installs into that location directly.
> 
> This is primarily because - we need these packages in the
> final/install location before configure can go to the next step of
> detecting/using this package for the next stage of dependency.

   Oh yeah, I forgot that reason also.

> So
> DESTDIR is not useful for us [and its not clear to me if most
> externalpackages we use support DESTDIR (or not) anyway]
> 
> Satish