problem with iostream

[Martin v. Loewis]

> i have overwritten my previous (2 year old) installation.  i suspect
> that your analysis is correct. alas i am not familiar enough with the
> g++ library system to work out which files are the troublemakers.
> (btw: is there an easily accessible description of the structure
> of g++ and its libraries, or do i have to read the code/man pages to
> get the picture?)

There is no easy description, because the matter is not very easy.  I
noticed that a number of things have gone wrong. Could you please let
me know what RPM packages related to g++ you have installed? You get a
list by doing

rpm -qa|grep gcc

This won't print all, you also need

rpm -qa|grep libstd

You can use RPM to get a description of these packages, and to look
what files they contain.

*In particular*, you should have a libstdc++-devel package
installed. Please make sure you do, and report its package name as
well as the names of the other packages. Also, please report the exact
location where you got the packages from (if you got them from a
CD-ROM, please report the version numbers printed on the CD-ROM
label).

>   libm.so.6 =3D> /lib/libm.so.6 (0x40018000)
>   libc.so.6 =3D> /lib/libc.so.6 (0x40035000)
>   /lib/ld-linux.so.2 =3D> /lib/ld-linux.so.2 (0x40000000)

That is not right - your compiler should have linked a shared version
of libstdc++ (unless you added -static). Please add -Wl,--verbose to
the compiler line and report the output of the linker. In particular,
look for the place where it gets libstdc++.a from, and check whether
there is a libstdc++.so nearby - there should be.

>   #include <...> search starts here:
>    /usr/local/include/g++

This is also not right. Please do 

  rpm -qf  /usr/local/include/g++

and report which package this directory came from. For egcs 2.91.66,
the include directory should be called g++-2.

>    /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.66/include

??? Are you sure the gcc installation came from a redhat package???
RedHat never installed gcc into /usr/local, AFAIK. Where did this
compiler come from? Please do

rpm -qf /usr/local/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.66/cc1plus

and report its output.

Regards,
Martin