Bug fix.
Description:
$CXX_BASENAME was not set yet if $CXX was pre-set to g++. In turn,
CXX_flags are not picking up the g++ values.
Solution:
The correct solution should be done in configure which should have
setup CXX_BASENAME if $CC is set before sourcing this file.
Put a special patch here for g++ for now.
(Also added the recognization of icc as another name for Intel
compilers.)
Platforms tested:
No h5committest but tested in TG-NCSA since these changes affected
the IA64 platform only.
Misc. update:
226950b616