import os
Import('osconfig')
from build_tools import *

cwd  = PresentDir()
src  = []
list = os.listdir(cwd)

CPPPATH    = []
CPPDEFINES = []
LIBS       = []
LINKFLAGS  = ''

#add common header files
CPPPATH.append(cwd + '/include')
CPPPATH.append(cwd + '/include/extension')

#gcc with newlibc or minilibc
if osconfig.COMPILER == 'gcc' and IsDefined('OS_USING_LIBC_ADAPTER'):
    if IsDefined('OS_USING_NEWLIB_ADAPTER'):
        # link with libc and libm:
        # libm is a frequently used lib. Newlib is compiled with -ffunction-sections in
        # recent GCC tool chains. The linker would just link in the functions that have
        # been referenced. So setting this won't result in bigger text size.
        LIBS += ['c', 'm']
        
        CPPPATH.append(cwd + '/include/newlib')
        
        src += Glob('source/common/*.c')
        src += Glob('source/newlib/*.c')
        
        if not IsDefined('OS_USING_IO_MULTIPLEXING'):
            DeleteSrcFile(src, 'source/newlib/poll.c')
            DeleteSrcFile(src, 'source/newlib/select.c')       

    else:
        #raise Exception("Libc not support, select valid libc")
        pass
#armcc with armlibc    
elif (osconfig.COMPILER == 'armcc' or osconfig.COMPILER == 'armclang') and IsDefined('OS_USING_LIBC_ADAPTER'):
    if IsDefined('OS_USING_ARMCCLIB_ADAPTER'):
        CPPPATH.append(cwd + '/include/armlibc')
        src += Glob('source/armlibc/*.c')
        src += Glob('source/common/*.c')

        if not IsDefined('OS_USING_IO_MULTIPLEXING'):
            DeleteSrcFile(src, 'source/armlibc/poll.c')
            DeleteSrcFile(src, 'source/armlibc/select.c')
    else:
        #raise Exception("No libc adapter available")
        pass
else:
    #raise Exception("Compiler not support")
    pass

group = AddCodeGroup('libc', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS, LINKFLAGS = LINKFLAGS)

Return('group')