commented out oldincludedir option : now this error: /mnt/persistent/naclports/src/out/repository/ncbi-blast-2.2.28+-src/c++/configure --host=x86_64-nacl --prefix=/home/MyMBP/nacl_sdk/pepper_31/toolchain/linux_x86_newlib/x86_64-nacl/usr --exec-prefix=/home/MyMBP/nacl_sdk/pepper_31/toolchain/linux_x86_newlib/x86_64-nacl/usr --libdir=/home/MyMBP/nacl_sdk/pepper_31/toolchain/linux_x86_newlib/x86_64-nacl/usr/lib
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.
configure: loading site script /mnt/persistent/naclports/src/out/repository/ncbi-blast-2.2.28+-src/c++/src/build-system/config.site

configure: loading cache config.cache
checking build system type... x86_64-unknown-linux-gnu
checking host system type... Invalid configuration nacl' not recognized
configure: error: /bin/bash /mnt/persistent/naclports/src/out/repository/ncbi-blast-2.2.28+-src/c++/src/build-system/config.sub x86_64-nacl failed
make: *** [out/sentinels/x86_64_newlib/ports/BLAST] Error 1
added new .sha1 file