Re: solaris iostream long long support

[Nathan Myers <ncm at nospam dot cantrip dot org>]

On Wed, Sep 26, 2001 at 07:08:50PM -0700, Peter A. Bigot wrote:
> libstdc++-v3 configure silently turns off --enable-long-long if full c99
> support is not present, even if strtoll and strtoul are available.  On
> Solaris7 and Solaris8, there is something missing (I think in the math
> library) that disables C99, thereby also disabling long-long even though all
> that's needed for that is strto{u,}ll, both of which are available.
> 
> In this situation, g++ -v still indicates that long-long is enabled, but
> libstdc++-v3/config.h does not define _GLIBCPP_USE_LONG_LONG, and any
> attempt to use iostream operators on long long data objects fails to
> compile.  This change happened late in the 3.0 pre-release series, and is
> still present in 3.0.1; long long iostream support still worked in at least
> one of the April or May pre-releases.

When you run configure, it looks for wcstol() and _Exit(), and 
not finding them, turns off C99 support.  Failing that, it turns
off long long support too.

The easiest way to fix 3.0.1 for a Solaris build is to comment out
lines 3562 to 3564 of libstdc++-v3/configure.  In general, long long
support probably should depend directly on the specific library
support features needed, or (better) not depend on any underlying
library support.  There's really no need to use the C library for
something as basic as formatting and parsing a long long value.

Nathan Myers
ncm at cantrip dot org