hi, all Now I meet new problem during compiling gcc-4.4.2. after installing gmp and mpfr, ./configure --prefix=/home/cj/gcc-4.4.2 --enable_languages=c,c++,fortran --with-gmp=/usr/local --with-mpfr=/usr/local make .libs/compile_options.o: In function 'feof_unlocked' /usr/include/bits/stdio.h:123: multiple definition of 'feof_unlocked' .libs/backtrace.o:/usr/include/bits/stdio.h:123: first defined here .libs/compile_options.o: In function 'ferror_unlocked': /usr/include/bits/stdio.h:130: multiple definition of 'ferror_unlocked' .libs/backtrace.o:/usr/include/bits/stdio.h:130: first defined here ... How to solve this? Thanks.