import sys

from numpy.distutils.fcompiler import FCompiler

compilers = ['NVHPCFCompiler']

class NVHPCFCompiler(FCompiler):
    """ NVIDIA High Performance Computing (HPC) SDK Fortran Compiler
   
    https://developer.nvidia.com/hpc-sdk
   
    Since august 2020 the NVIDIA HPC SDK includes the compilers formerly known as The Portland Group compilers,
    https://www.pgroup.com/index.htm.
    See also `numpy.distutils.fcompiler.pg`.
    """

    compiler_type = 'nv'
    description = 'NVIDIA HPC SDK'
    version_pattern = r'\s*(nvfortran|(pg(f77|f90|fortran)) \(aka nvfortran\)) (?P<version>[\d.-]+).*'

    executables = {
        'version_cmd': ["<F90>", "-V"],
        'compiler_f77': ["nvfortran"],
        'compiler_fix': ["nvfortran", "-Mfixed"],
        'compiler_f90': ["nvfortran"],
        'linker_so': ["<F90>"],
        'archiver': ["ar", "-cr"],
        'ranlib': ["ranlib"]
    }
    pic_flags = ['-fpic']

    module_dir_switch = '-module '
    module_include_switch = '-I'

    def get_flags(self):
        opt = ['-Minform=inform', '-Mnosecond_underscore']
        return self.pic_flags + opt

    def get_flags_opt(self):
        return ['-fast']

    def get_flags_debug(self):
        return ['-g']

    def get_flags_linker_so(self):
        return ["-shared", '-fpic']

    def runtime_library_dir_option(self, dir):
        return '-R%s' % dir

if __name__ == '__main__':
    from distutils import log
    log.set_verbosity(2)
    from numpy.distutils import customized_fcompiler
    print(customized_fcompiler(compiler='nv').get_version())
