Re: different gccs

[Ralf Corsepius]

On Mon, 2003-07-14 at 01:35, Bob Lockie wrote:
> This is based on behavoir/assumptions.
> 
> I think libsupc++ is included in gcc-2x but not in gcc-3x.

Conversely.

> I need libstdc++ in gcc-2x but I need both libstdc++ and libsupc++ in 
> gcc-3x but libsupc++ does not exist in gcc-2x.
OK, here you say it. libsupc++ is shipped with gcc-3.x

> AC_CHECK_LIB( stdc++, main, , AC_MSG_ERROR( [*** stdc++ library is 
> required ***] ), )
> 
> AC_CHECK_LIB( supc++, main, , AC_MSG_ERROR( [*** supc++ library is 
> required ***] ), )
> 
> Are my assumptions correct and how can I write a configure.in that works 
> regardless off gcc version?
You don't have to check for libsupc++. libsupc++ is an internal
implementation detail of gcc-3.x you should not have to care about nor
to check for. "g++" will automatically link against it.

However, I guess the origin of your problem is using "gcc" to compile
and link C++-application. This previously had worked with gcc < 3.0 on
some platforms, but with gcc >= 3.0 using "g++" to compile/link
C++-applications is mandatory and probably will fix your problems.

Ralf