new build system

[Barry Smith]

On Wed, 13 Jun 2007, Satish Balay wrote:

> gcc's model appears to be more similar to PETSc.
> 
> [we had petscconf.h in lib :)]

  When, I never remember this?

   Barry

> 
> GCC_DIR=/usr/lib/gcc
> GCC_ARCH=i386-redhat-linux
> GCC_VER=4.1.1
> 
> We have 2 variables and they have 3 :). Because they use wrappers [aka
> compilers] no env variable is required to do the switch..
> 
> Satish
> 
> On Wed, 13 Jun 2007, Barry Smith wrote:
> 
> > 
> >   What the hey are include files doing inside lib? What a crock.
> > 
> >    Barry
> > 
> > On Wed, 13 Jun 2007, Satish Balay wrote:
> > 
> > > 
> > > 
> > > On Wed, 13 Jun 2007, Lisandro Dalcin wrote:
> > > 
> > > > I am using Fedora Core 6, I've installed ATLAS rpm, see the contents:
> > > 
> > > gcc, python are representative of packages that can have multiple
> > > version installed simultaneously.
> > > 
> > > /usr/bin/python2.4
> > > /usr/include/python2.4/Python.h
> > > /usr/lib/python2.4/os.py
> > > /usr/lib/python2.4/config/Makefile
> > > /usr/lib/python2.4/config/Setup
> > > 
> > > 
> > > /usr/lib/gcc/i386-redhat-linux/4.1.1/include/float.h
> > > /usr/lib/gcc/i386-redhat-linux/3.4.6/include/float.h
> > > 
> > > /usr/lib/gcc/i386-redhat-linux/4.1.1/libgcc.a
> > > /usr/lib/gcc/i386-redhat-linux/3.4.6/libgcc.a
> > > 
> > > etc..
> > > 
> > > One major difference they have [wrt PETSc] is the internals are not
> > > directly accessed by users. Only the binaries are.  So just having
> > > gcc, gcc34 as 2 binaries is sufficient to distinguish these 2 packages
> > > [and these wrappers know the internal paths to the correct version of
> > > libraries]
> > > 
> > > Satish
> > > 
> > > 
> > 
> > 
> 
>