"""SCons.Tool.as

Tool-specific initialization for as, the Gnu assembler.

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.

"""

#
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import os.path

import SCons.Defaults
import SCons.Tool
import SCons.Util

assemblers = ['as', 'gas']

ASSuffixes = ['.s', '.asm', '.ASM']
ASPPSuffixes = ['.spp', '.SPP']
if os.path.normcase('.s') == os.path.normcase('.S'):
    ASSuffixes.extend(['.S'])
else:
    ASPPSuffixes.extend(['.S'])

def generate(env, platform):
    """Add Builders and construction variables for as to an Environment."""
    static_obj, shared_obj = SCons.Tool.createObjBuilders(env)

    for suffix in ASSuffixes:
        static_obj.add_action(suffix, SCons.Defaults.ASAction)

    for suffix in ASPPSuffixes:
        static_obj.add_action(suffix, SCons.Defaults.ASPPAction)

    env['AS']        = env.Detect(assemblers) or 'as'
    env['ASFLAGS']   = ''
    env['ASCOM']     = '$AS $ASFLAGS -o $TARGET $SOURCES'
    env['ASPPCOM']   = '$CC $ASFLAGS $CPPFLAGS $_CPPINCFLAGS -c -o $TARGET $SOURCES'

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