[petsc-dev] [petsc-maint #49590] problem building petsc-dev

[Barry Smith]

  Hmmm, I never use --with-pic=1 

  Why don't we just enable pic by default. Then if user does --with-pic=0 --with-shared we complain. Better than always required shared people to use --with-pic. People who don't want to use --with-pic are far and few between.

    Barry

On Jul 16, 2010, at 8:39 PM, Satish Balay wrote:

> On Fri, 16 Jul 2010, Barry Smith wrote:
> 
>> 
>>  I think Satish is right we should have
>> 
>> --with-shared-libraries
>> --with-dynamic-loading 
>> 
>>  I haven't made this change but I've changed
>> 
>> improved help message for --with-shared	and --with-dynamic
>> made --with-dynamic require --with-shared
>> make --with-shared NOT allow --with-pic=0
> 
> Barry,
> 
> With this change one has to always do the following for sharedlibs:
> 
> --with-pic=1 --with-shared=1
> 
> and for dynamic libraries.
> 
> --with-pic=1 --with-shared=1 --with-dynamic=1
> 
> Earlier behavior was for --with-pic to be implicitly enabled for
> with-shared or with-dynamic. It would be good to retain the old
> behavior.
> 
> Part of the problem is: configure cannot distinguish between user
> provided value vs configure default value - for any given option. So
> we can't do both:
> 
> * default-pic=disabled but  autoenable if  user provides --with-shared=1
> * if user provides '--with-pic=0 --with-shared=1' - flag as error.
> 
> [I didn't remember this part - when I started this thread about this
> issue. Looks like we should silently ignore --with-pic - when
> --with-shared is enabled]
> 
> Satish
> 
> 
>> I'll change the option names in a little while