problem with --tag=CXX argument

[jdf [zionarea.org]]

Hi,

Developping libraries in C++, I'm used with doing some makefiles
and configure files. But I'm less with libtool.

I progressively upgraded my development tools to newer ones:
gcc 3.4.1
automake 1.9.4
autoconf 2.59
libtool 1.5.10
make 3.80

But the project doesn't compile anymore, with saying such error:

libtool: unrecognized option `--tag=CXX'

I'm not able to do anything. Everything I've tried (with looking
at older posts here) didn't worked.

Does someone has any idea on how to avoid this problem ?

Thank you.