# MIT License
#
# Copyright The SCons Foundation
#
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# a copy of this software and associated documentation files (the
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# permit persons to whom the Software is furnished to do so, subject to
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"""
Tool-specific initialization for g77.

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.
"""

import SCons.Util
from SCons.Tool.FortranCommon import add_all_to_env, add_f77_to_env

compilers = ['g77', 'f77']


def generate(env):
    """Add Builders and construction variables for g77 to an Environment."""
    add_all_to_env(env)
    add_f77_to_env(env)

    fcomp = env.Detect(compilers) or 'g77'
    if env['PLATFORM'] in ['cygwin', 'win32']:
        env['SHFORTRANFLAGS'] = SCons.Util.CLVar('$FORTRANFLAGS')
        env['SHF77FLAGS'] = SCons.Util.CLVar('$F77FLAGS')
    else:
        env['SHFORTRANFLAGS'] = SCons.Util.CLVar('$FORTRANFLAGS -fPIC')
        env['SHF77FLAGS'] = SCons.Util.CLVar('$F77FLAGS -fPIC')

    env['FORTRAN'] = fcomp
    env['SHFORTRAN'] = '$FORTRAN'

    env['F77'] = fcomp
    env['SHF77'] = '$F77'

    env['INCFORTRANPREFIX'] = "-I"
    env['INCFORTRANSUFFIX'] = ""

    env['INCF77PREFIX'] = "-I"
    env['INCF77SUFFIX'] = ""


def exists(env):
    return env.Detect(compilers)

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