Re: [boost] [1.44][Serialization] fails to compile on OSX universal

Subject: Re: [boost] [1.44][Serialization] fails to compile on OSX universal
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2010-08-20 12:47:17

On Aug 20, 2010, at 10:38 AM, Robert Ramey wrote:
> Jeff Flinn wrote:
>> Building boost 1.44 on Mac OSX generating universal binaries fails to
>> compile serialization lib, due to static asserts in
>> basic_binary_?archive.hpp's at:
>> 
>>    BOOST_STATIC_ASSERT(sizeof(tracking_type) == sizeof(char));
>> 
>> It appears that this fails for the ppc architecture.
>> 
>> Robert, Any ideas on fixing this?
>> 
>> Thanks, Jeff
>> 
>> _______________________________________________
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> 
> 
> I included these asserts to trap any future change in the size of these 
> types.
> Accidently changing these sizes silently breaks previous archives which is
> a major pain.
> 
> boost/archive/tracking_type is actually a bool - which I had assumed would
> be a char in all machines.  So I guess that correct way to express this 
> would be:
> 
> BOOST_STATIC_ASSERT(sizeof(tracking_type) == sizeof(bool));
> 
> Try making this change and verify that it fixes the problem and I'll check 
> in the change.

Tests done on my Mac running 10.6.4:

$ g++ --version
i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)

$ cat junk.cpp
#include <iostream>

int main ( int argc, char *argv[] ) {
        std::cout << "sizeof (bool) = " << sizeof (bool) << std::endl;
        return 0;
        }

$ g++ -arch i386 junk.cpp && ./a.out
sizeof (bool) = 1

$ g++ -arch x86_64 junk.cpp && ./a.out
sizeof (bool) = 1

$ g++ -arch ppc junk.cpp && ./a.out
sizeof (bool) = 4

-- Marshall