Re: [Boost-users] [Regex] problems compiling with gcc 4.4

Subject: Re: [Boost-users] [Regex] problems compiling with gcc 4.4
From: Aonghus Lawlor (thecolourblue_at_[hidden])
Date: 2008-12-14 10:32:06

On Sun, Dec 14, 2008 at 9:37 AM, John Maddock <john_at_[hidden]>wrote:

> Aonghus Lawlor wrote:
>
>> Hi,
>>>
>>> I am using boost 1.37 on osx from macports and I have a problem
>>> using the regex library with gcc 4.4, although it seems to work
>>> perfectly with gcc 4.3 and 4.2.
>>>
>>> The problem is with creating a boost::regex object- simple program
>>> below:
>>>
>>
> Looking at the backtrace the std::messages facet seems to be failing, can
> you try something like:
>
> std::locale l;
> std::use_facet<std::messages<char> >(l);
>
> and see if that also crashes?
>
> Thanks, John.
>

Thanks for the suggestion- I tried this line:

 const std::locale locale;
 const std::messages<char>& msgs = std::use_facet< std::messages<char> >(
locale );

but it makes no difference- the program still crashes only with gcc-4.4, and
not previous versions.

This is the compile command I am using (on osx):

 g++-mp-4.4 -g -o boost_test_regex boost_test_regex.C
-I/opt/local/include/boost -L/opt/local/lib -lboost_regex-mt

and it terminates like this:

$ ./boost_test_regex
terminate called after throwing an instance of 'std::bad_cast'
  what():  std::bad_cast
Abort trap

The gcc-4.4 is from macports, and was working fine with the rest of my code,
until I ran into this problem with boost:

$ g++-mp-4.4 -v
Using built-in specs.
Target: i386-apple-darwin9.5.0
Configured with: ../gcc-4.4-20081128/configure --prefix=/opt/local
--enable-languages=c,c++,objc,obj-c++ --libdir=/opt/local/lib/gcc44
--includedir=/opt/local/include/gcc44 --infodir=/opt/local/share/info
--mandir=/opt/local/share/man --with-local-prefix=/opt/local
--with-system-zlib --disable-nls --program-suffix=-mp-4.4
--with-gxx-include-dir=/opt/local/include/gcc44/c++/ --with-gmp=/opt/local
--with-mpfr=/opt/local
Thread model: posix
gcc version 4.4.0 20081128 (experimental) (GCC)

I'm not really familiar with the usage of locale's and use_facet's , so I'm
grateful for any other suggestions you might have,

thanks,

a