[petsc-dev] clash of --download-xxx with something in /usr/include /usr/local/include

[Barry Smith]

  On a different tack, maybe try to find the include file with the default paths BEFORE running the download/install and then stopping and telling the person they are already there in a dangerous place?

   Barry

  
> On Jan 27, 2016, at 2:00 PM, Satish Balay <balay at mcs.anl.gov> wrote:
> 
> I guess something like the following might work:
> 
> For any include file configure checks - it preserves the signature of
> its location and dependencies [and locadtions].  I think a
> 'preprocessed file' will have the relavent info/signature.
> 
> And at the end of configure - these signatures [preprcessed files]
> have to be regenerated - and compare..
> 
> Satish
> 
> On Wed, 27 Jan 2016, Barry Smith wrote:
> 
>> 
>>   When one runs for example --download-hd5f but there are hdf5 include files in /usr/include or /usr/local/include different compile stages, for example for different external packages, may use the wrong include files leading to very confusing failed builds. 
>> 
>>   Is there any systematic tests we could add in configure that could detect this type of potential problem and error out or warn?
>> 
>>   Thanks
>> 
>>   Barry
>> 
>> 
>> 
>