[petsc-users] Building PETSc with cmake

[Satish Balay]

On Tue, 13 Sep 2011, John Fettig wrote:

> What are the requirements for building PETSc with cmake?  I have cmake
> version 2.8.1 installed, and configure finds it, but it does nothing
> with it.  Is it because my python version is too old?  This is on
> CentOS 5, I get these messages about cmake in the configure.log (with
> 3.2-p0):
> 
> Checking for program /usr/local/bin/cmake...found
>             Defined make macro "CMAKE" to "/usr/local/bin/cmake"
> 
> ...
> 
>       Skipping cmakegen due to old python version: (2, 4, 3, 'final', 0)
>       Skipping cmakeboot due to old python version: (2, 4, 3, 'final', 0)

yes - cmake part of configure requires python-2.5. Perhaps we should
look at this code and see if it can be made to work with 2.3+ [current
configure requirement]

If configure determines that cmake build won't work [either due to the
python version issue - or some other configue issue - for eg: windows
compilers - it won't offer this build option at tthe end.

> At the end of the configure, I'm not offered a way to build with
> cmake.  I presume that cmake is the only way to do a parallel build?

Yes - currently cmake build is the only way to do parallel builds.

. Also builder.py [if it works for your config] could be faster than
the 'make all-legacy' build.

Satish