[root avr-libc-1.2.3]# PREFIX=/usr/local/avr [root avr-libc-1.2.3]# export PREFIX [root avr-libc-1.2.3]# sh -X ./doconf creating cache ./config.cache checking host system type... avr-unknown-none checking target system type... avr-unknown-none checking build system type... i386-pc-nto-qnx checking for a BSD compatible install... ../install-sh -c checking whether build environment is sane... yes checking whether make sets ${MAKE}... yes checking for working aclocal-1.4... missing checking for working autoconf... missing checking for working automake-1.4... missing checking for working autoheader... missing checking for working makeinfo... missing checking for avr-as... no checking for as... as checking for avr-ar... no checking for ar... ar checking for avr-ranlib... no checking for ranlib... ranlib checking for avr-gcc... no checking for gcc... gcc configure: error: Wrong C compiler found; check the PATH! [root avr-libc-1.2.3]#