Help:building gcc-4.6.2 error

[Derek stallone]

I chose a gcc 4.6.2. I downloaded gcc-4.6.2.tar.bz2 from here ftp://ftp.gnu.org/gnu/gcc/gcc-4.4.6/ and made the following steps:
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stallone@stallone-desktop:~$mkdir build-gcc
stallone@stallone-desktop:~$cd build-gcc/
stallone@stallone-desktop:~/build-gcc$sudo /usr/src/gcc/gcc-4.6.2/configure --prefix=/usr/gcc-4.6.2/ --with-gmp=/usr/local/gmp --with-mpfr=/usr/src/mpfr --with-mpc=/usr/local/mpc --with-ppl=/usr/local/gmp --with-cloog=/usr/local LDFLAGS="-L/usr/local/lib -Xlinker -R/usr/local/lib" CONFIG_SHELL=/bin/bash -enable-languages=c,c++,fortran
stallone@stallone-desktop:~/build-gcc$make
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And after makeing,I have some errors!
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In file included from /usr/src/gcc/gcc-4.6.2/gcc/cp/except.c:912:0:
/usr/src/gcc/gcc-4.6.2/gcc/cp/cfns.gperf:101:1: error: ‘gnu_inline’ attribute present on ‘libc_name_p’
/usr/src/gcc/gcc-4.6.2/gcc/cp/cfns.gperf:26:14: error: but not here
make[3]: *** [cp/except.o] Error 1
make[3]: Leaving directory `/home/stallone/build-gcc/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/home/stallone/build-gcc'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/home/stallone/build-gcc'
make: *** [all] Error 2
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What did I do wrong and how to fix it?