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"""
This sample illustrates a simple CUDA source to PTX compiler implemented using
NVRTC.  All command-line options are passed along to NVRTC.  Arguments that
start with '-' are assumed to be options and are passed along accordingly.
Otherwise, the option is treated as a file name and is read as input.

NOTE: If you get errors about not being able to load nvrtc, please make sure
your [DY]LD_LIBRARY_PATH/PATH environment variable points to the nvrtc binary
in your CUDA installation, e.g.

  $ export LD_LIBRARY_PATH=/usr/local/cuda-9.2/lib64:$LD_LIBRARY_PATH
"""

import sys
from pynvrtc.compiler import Program, ProgramException


if len(sys.argv) < 2:
    print('Usage: %s [options] <cuda source file>' % sys.argv[0])
    sys.exit(1)

try:
    src = None
    options = []

    # Parse all options
    for a in sys.argv[1:]:
        if a.startswith('-'):
            # Treat as compiler option
            options.append(a)
        else:
            # Treat as compiler input
            with open(a, 'rb') as f:
                src = f.read()

    # Create program object
    p = Program(src)

    # Run the compile
    ptx = p.compile(options)

    # Dump the output to stdout
    print(ptx)

    sys.exit(0)

except ProgramException as e:
    # An error occurred, dump it to stdout
    print('ERROR:\n%s\n' % repr(e))
