script:
    # make sure example can at least compile
    - sed -n '/``` c/,/```/{/```/d; p;}' README.md > test.c &&
      CFLAGS='
        -Duser_provided_block_device_read=NULL
        -Duser_provided_block_device_prog=NULL
        -Duser_provided_block_device_erase=NULL
        -Duser_provided_block_device_sync=NULL
        -include stdio.h -Werror' make

    # run tests
    - CFLAGS="-DLFS_READ_SIZE=16  -DLFS_PROG_SIZE=16"  make test
    - CFLAGS="-DLFS_READ_SIZE=1   -DLFS_PROG_SIZE=1"   make test
    - CFLAGS="-DLFS_READ_SIZE=512 -DLFS_PROG_SIZE=512" make test