Hi I try to install gcc-3.4.6 in my ubuntu 11.04 after I prompt make I've got below error: In file included from ./libgcov.c:86: ./gcov-io.c: In function `__gcov_open': ./gcov-io.c:94: error: `EINTR' undeclared (first use in this function) ./gcov-io.c:94: error: (Each undeclared identifier is reported only once ./gcov-io.c:94: error: for each function it appears in.) make[2]: *** [libgcc/./_gcov.o] Error 1 make[2]: Leaving directory `/home/esmaeil/Documents/software/gcc-3.4.6/gcc' make[1]: *** [libgcc.a] Error 2 make[1]: Leaving directory `/home/esmaeil/Documents/software/gcc-3.4.6/gcc' make: *** [all-gcc] Error 2 I will appreciate for any help. Best Samuel