[PATCH/RFC] libstdc++'s tr1/cstdint vs. IRIX's stdint.h

[Paolo Carlini]

Hi everyone (just back from a few days of vacations),

>> I'm not really sure the best way to fix this.  Conceptually, it would
>> make sense of libstdc++ to use the C++ compiler to detect whether 
>> headers
>> are available.  Unfortunately, my autoconf-foo isn't clever enough for
>> that.
>
> You can try sticking AC_LANG_CPLUSPLUS somewhere at the top of
> libstdc++ configure.ac.

Indeed, this is a very good point/idea, which should be fully explored. 
For now, for 4.2.0, seems a bit too risky (currently we have got a messy 
;) mix of C++ and C tests...) and I would rather fix IRIX with the 
below, which I'm lightly testing. Unless you can figure out serious 
problems with it, tomorrow I will go ahead and apply it.

Thanks,
Paolo.

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