[Buildroot] prefix question for kodi.

[daggs]

Greetings,

I'm trying to understand why the kodi's configure prefix param points to /usr and not to the staging dir. can someone help me understand?
here is the line:
cd /home/dagg/workspace/buildroots/buildroot-master2/output/build/kodi-16.1-Jarvis/ && rm -rf config.cache && PATH="/home/dagg/workspace/buildroots/buildroot-master2/output/host/bin:/home/dagg/workspace/buildroots/buildroot-master2/output/host/sbin:/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin:/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/sbin:/usr/local/bin:/usr/bin:/bin:/opt/vmware/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/5.3.0:/usr/x86_64-pc-linux-gnu/aarch64-unknown-linux-muslabi/gcc-bin/5.3.0:/usr/games/bin:/usr/sbin:/usr/local/bin" AR="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-ar" AS="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-as" LD="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-ld" NM="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-nm" CC="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-gcc" GCC="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-gcc" CPP="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-cpp" CXX="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-g++" FC="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-gfortran" F77="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-gfortran" RANLIB="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-ranlib" READELF="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-readelf" STRIP="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-strip" OBJCOPY="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-objcopy" OBJDUMP="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-objdump" AR_FOR_BUILD="/usr/bin/ar" AS_FOR_BUILD="/usr/bin/as" CC_FOR_BUILD="/usr/bin/gcc" GCC_FOR_BUILD="/usr/bin/gcc" CXX_FOR_BUILD="/usr/bin/g++" LD_FOR_BUILD="/usr/bin/ld" CPPFLAGS_FOR_BUILD="-I/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/include" CFLAGS_FOR_BUILD="-O2 -I/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/include" CXXFLAGS_FOR_BUILD="-O2 -I/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/include" LDFLAGS_FOR_BUILD="-L/home/dagg/workspace/buildroots/buildroot-master2/output/host/lib -L/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/lib -Wl,-rpath,/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/lib" FCFLAGS_FOR_BUILD="" DEFAULT_ASSEMBLER="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-as" DEFAULT_LINKER="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/arm-buildroot-linux-gnueabihf-ld" CPPFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64" CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os " CXXFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os " LDFLAGS="" FCFLAGS=" -Os " FFLAGS=" -Os " PKG_CONFIG="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/pkg-config" STAGING_DIR="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot" INTLTOOL_PERL=/usr/bin/perl ac_cv_lbl_unaligned_fail=yes ac_cv_func_mmap_fixed_mapped=yes ac_cv_func_memcmp_working=yes ac_cv_have_decl_malloc=yes gl_cv_func_malloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes ac_cv_func_calloc_0_nonnull=yes ac_cv_func_realloc_0_nonnull=yes lt_cv_sys_lib_search_path_spec="" ac_cv_c_bigendian=no  PYTHON_VERSION="2.7" 
PYTHON_LDFLAGS="-lpython2.7 -lpthread -ldl -lutil -lm" PYTHON_CPPFLAGS="-I/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/include/python2.7" PYTHON_SITE_PKG="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/python2.7/site-packages" PYTHON_NOVERSIONCHECK="no-check" use_texturepacker_native=yes USE_TEXTUREPACKER_NATIVE_ROOT="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr" TEXTUREPACKER_NATIVE_ROOT="/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr" CXXFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  `/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/pkg-config --cflags --libs egl`" CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  `/home/dagg/workspace/buildroots/buildroot-master2/output/host/usr/bin/pkg-config --cflags --libs egl`" CONFIG_SITE=/dev/null ./configure --target=arm-buildroot-linux-gnueabihf --host=arm-buildroot-linux-gnueabihf --build=x86_64-pc-linux-gnu --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --localstatedir=/var --program-prefix="" --disable-gtk-doc --disable-gtk-doc-html --disable-doc --disable-docs --disable-documentation --with-xmlto=no --with-fop=no --disable-dependency-tracking --enable-ipv6  --disable-static --enable-shared  --with-ffmpeg=shared --disable-joystick --disable-openmax --disable-pulse --disable-vdpau --disable-vtbdecoder --enable-optimizations --disable-mysql --enable-codec=amcodec --disable-libcap --disable-dbus --disable-alsa --disable-gl --disable-x11 --enable-gles --disable-libusb --disable-webserver --disable-samba --disable-nfs --disable-rtmp --disable-libbluray --disable-airplay --disable-ssh --disable-avahi --disable-libcec --disable-lirc --disable-vaapi --disable-optical-drive --disable-dvdcss