[BuildTools] Problem with ASL and AC_CHECK_SIZEOF(long long)

[Kipp Martin]

Hi Andreas:


> 
> ac_cv_sizeof_long_long
> 
> and I get you can somehow unset it if you need to.  Have a look at the 
> configure file that is generated for your configure.ac file - maybe that 
> gives you some hints.

That's what I did without much luck. I spent a fair amount of time 
poking around the generated configure file and tried all sorts of 
permutations and combinations such as

ac_cv_sizeof_long_long=

hoping that this would undefine it, etc.

Not much luck, I will keep trying.

Cheers,


> 
> Cheers
> 
> Andreas
> 
> On Mon, 11 Feb 2008, Kipp Martin wrote:
> 
>> Hi Lou:
>>
>>>
>>>     As is often the case, I'm confused.
>>
>> I have that effect on people including myself.
>>
>>>
>>>     All of the various type checks in Coin configure scripts are 
>>> performed
>>> using C in order to avoid issues with Microsoft C++.  I'm extremely 
>>> surprised
>>> that the size of long long would differ between C and C++.  I thought 
>>> this was
>>> illegal.  Add to that, I always build with configure -C, and I've 
>>> never run into
>>> this issue.
>>
>> My understanding from a number of Google sources is that indeed long
>> long is 8 bytes in C and not defined in C++.  See for example,
>>
>> http://gcc.gnu.org/ml/gcc/2003-08/msg00847.html
>>
>> If you do an AC_CHECK_SIZEOF(long long) in the ASL configure.ac you will
>> have an 8 returned. However, if you do AC_CHECK_SIZEOF(long long) in the
>> OS configure.ac (without -C when you configure) you will have 0 returned.
>>
>>
>>>
>>>     Building on SPARC / Solaris 10 / Studio, configure, make, make 
>>> test is
>>> successful.
>>>
>>>     I notice you've added a check for long long in the top-level
>>
>> If you look at OS release 1617 the check for long long should not be in
>> the top level config.ac file.
>>
>>> configure.ac.  Should I remove this to try and replicate the problem? 
>>> By chance,
>>> is this a Mac thing? Some issue with the Mac C++ compiler?
>>
>> It is not just a Mac thing. I got emails from JP today and it broke two
>> of his platforms,  both Intel Linux and Power PC Linux.  I had the same
>> problem on mingw/gcc so there are at least three platforms other than
>> the Mac where this happens.
>>
>> Duplicating resutls -- if you want to try to duplicate this, could you
>> get the current OS release of 1617 and go into configure.ac in OS and in
>> line 83 remove the comment.  If you configure with -C (no other options)
>> you should get the error below.
>>
>> Thanks
>>
>>
>>
>>  -lgfortranbegin -lgfortran -lSystem
>> checking for dummy main to link with Fortran libraries... (cached) none
>> checking for Fortran name-mangling scheme... (cached) lower case,
>> underscore, no extra underscore
>> checking for egrep... (cached) grep -E
>> checking for a BSD-compatible install... (cached) /usr/bin/install -c
>> checking whether build environment is sane... yes
>> checking for gawk... (cached) awk
>> checking whether make sets $(MAKE)... (cached) yes
>> checking for style of include used by make... GNU
>> checking dependency style of cc... (cached) gcc3
>> checking dependency style of g++... (cached) gcc3
>> checking whether to enable maintainer-specific portions of 
>> Makefiles... no
>> configure: Using libtool script in directory ..
>> checking whether byte ordering is bigendian... (cached) no
>> checking for long long... (cached) yes
>> checking size of long long... configure: error: cannot compute sizeof
>> (long long), 77
>> See `config.log' for more details.
>>>
>>>                             Lou
>>>
>>>
>>> ------------- End Forwarded Message -------------
>>>
>>>
>>> _______________________________________________
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>>
>>
>> -- 
>> Kipp Martin
>> Professor of Operations Research
>> and Computing Technology
>> Graduate School of Business
>> University of Chicago
>> 5807 South Woodlawn Avenue
>> Chicago, IL 60637
>> 773-702-7456
>> kipp.martin at chicagogsb.edu
>> http://gsbkip.chicagogsb.edu
>> http://www.coin-or.org
>> _______________________________________________
>> BuildTools mailing list
>> BuildTools at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/buildtools
>>


-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Graduate School of Business
University of Chicago
5807 South Woodlawn Avenue
Chicago, IL 60637
773-702-7456
kipp.martin at chicagogsb.edu
http://gsbkip.chicagogsb.edu
http://www.coin-or.org