Пытаюсь собрать ecOS:
$ ./configure --host=arm-eabi
configure: WARNING: If you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used.
checking build system type... x86_64-unknown-linux-gnu
checking host system type... arm-unknown-eabi
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for arm-eabi-strip... no
checking for strip... strip
checking whether to enable maintainer-specific portions of Makefiles... no
checking that a separate build tree is being used... no
configure: error: This configure script should not be run inside the source tree. Instead please use a separate build tree
собственно в чем проблема?