RedHat 7.0 uses a non-standard gcc package, v2.96, which has some
incompatibility problems. Currently, this package does not not compile
with this version of c++.

However, RedHat 7.0 does include egcs++ (cc++ 2.95.2) which works
fine. To use this version of the compiler, prefix the configure and
command with CXX=egcs++. For example:
  CXX=egcs++ ./configure