Running 'make' command in verbose mode

[Sumit Vaidya]

Hi,

My interest is to use PETSc by building the libraries. 
I got the answer. Thank you for the information. Yes, the build procedure is
equivalent to autoconf model.

Regards,
Sumit

-----Original Message-----
From: owner-petsc-users at mcs.anl.gov [mailto:owner-petsc-users at mcs.anl.gov]
On Behalf Of Satish Balay
Sent: Wednesday, August 01, 2007 8:25 PM
To: petsc-users at mcs.anl.gov
Subject: RE: Running 'make' command in verbose mode

Is your interest either of:
 - use PETSc [by building PETSc libraries] - 
 - investigate the build infrastructure in PETSc?

If its the second one - could I enquire for what purpose would such
investigation be useful?


On Wed, 1 Aug 2007, Sumit Vaidya wrote:

> I found your build procedure something different than the other
> applications. So I was eager to know about it. 
> 
> Other applications produce makefiles through configure script and use it
for
> actual building. But here I found makefiles are already present along with
> the package and configure script is mainly doing some testing and
producing
> architecture configuration files.

This is inference is incorrect. [there is not much difference in the 2
methods you mention - except for a different organization of the
makefiles]

Our model is equivalent to autoconf model [you refer to]. With
autoconf, [from what I understand] Makefile.in has the pre-written
make targets [by the package developer], and then there are some
variables [like CC etc] that configure detects and substitutes - and
creates Makefile.

We also have pre-written targets, and variables that configure detects
and substitutes. The difference is - in case of autoconf, the
generated makefile has both targets & variables. We chose to split up
generated variables into different makefiles in bmake/$PETSC_ARCH, and
the pre-written targets into bmake/common/* files. [And then the
toplevel makefile that included the relavent generated/precoded
targets]

So, in both cases, the 'makefiles' are useable by the user only after
configure is run.

Hope this helps,
Satish


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