icc 8.1 doesn't work on fedora linux

icc 8.1 doesn't work on fedora linux

When I installed icc 8.0 on fedora core2,icc worked well.But,When I installed icc 8.1 instead of icc 8.0 on fedora core2,icc 8.1 got errors as below.
#icc: error: could not find directory in which g++ resides
So,I read this forum and gave options as below to icc command.
-cxxlib-icc (get errors)
-gcc-name=/usr/bin/gcc (get errors)
And I set environmental variables as below.
export GCCROOT=/usr (doesn't work)
Does anyone know how to make icc8.1 work well on fedora core2?

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