Mcucpp

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import os
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from SCons.Script import *
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def setup_gnu_tools(env, prefix):
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	for tool in ['gcc', 'g++', 'gnulink', 'ar', 'gas']:
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		env.Tool(tool)
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	env['CC'] = prefix+'gcc'
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	env['CXX'] = prefix+'g++'
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	env['AR'] = prefix+'ar'
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	env['AS'] = prefix+'as'
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	env['LINK'] = prefix+'gcc'
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	env['OBJCOPY'] = prefix+'objcopy'
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	env['OBJDUMP'] = prefix+'objdump'
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	env['NM'] = prefix+"nm"
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	env['RANLIB'] = prefix+"ranlib"
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	env['SIZE'] = prefix+"size"
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	env['PROGSUFFIX'] = '.elf'
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	env['GDB'] = prefix + 'gdb'
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	env['CFLAGS'] = ["-std=gnu11", "-Wredundant-decls","-Wnested-externs"]
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	env['CCFLAGS'] = [
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		"-g",
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		"-funsigned-char",
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		"-funsigned-bitfields",
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		"-fshort-enums",
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		"-ffunction-sections",
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		"-fdata-sections",
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		"-Wall",
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		"-Wformat",
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		"-Wextra",
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		"-Wpointer-arith",
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		"-Wunused",
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		"-nostdlib"
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	]
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	env['CXXFLAGS'] = [
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		"-fno-exceptions",
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		"-fno-threadsafe-statics",
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		"-fno-rtti",
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		"-fuse-cxa-atexit",
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		"-Woverloaded-virtual",
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		"-std=c++17"
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		#"-std=c++03"
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	]
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	env['ASFLAGS'] = [
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		"-gdwarf-2",
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		"-xassembler-with-cpp",
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	]
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	linkerscript = ""
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	startFiles = ""
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	env.Append(CPPDEFINES = {})
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	if 'DEVICE' in env:
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		device = env['DEVICE']
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		if 'defines' in device:
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			env.Append(CPPDEFINES = device['defines'])
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		if 'clock' in device:
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			env.Append(CPPDEFINES = {'F_CPU' : device['clock'] })
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		if 'linkerScript' in device and device['linkerScript'] is not None:
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			formattedLinkerScript = device['linkerScript'] % env
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			linkerscript = env.File(formattedLinkerScript).srcnode().abspath
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			linkerscript = '-T%s' % linkerscript
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		if 'includes' in device and device['includes'] is not None:
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			formattedIncludes = [os.path.abspath( include % env) for include in device['includes']]
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			env.Append(CPPPATH = formattedIncludes)
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		if 'startup' in device and device['startup'] is not None:
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			startFiles = '-nostartfiles'
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	env['LINKFLAGS'] = [
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		"-Wl,--gc-sections",
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		"-Wl,-Map=${TARGET.base}.map",
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		linkerscript,
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		startFiles
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	]
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	binBuilder = Builder(
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		action = '$OBJCOPY -O binary --only-section $SECTION_NAME $SOURCE $TARGET', 
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		src_suffix = ".elf",
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		suffix = ".bin")
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	disasmBuilder = Builder(
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		action = '$OBJDUMP -h -S $SOURCE > $TARGET', 
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		src_suffix = ".elf",
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		suffix = ".lss")
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	env.Append(BUILDERS = {
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		'Disassembly': disasmBuilder,
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		'DumpSection': binBuilder})
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	prettyPrefix = prefix
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	if prettyPrefix.endswith('-'):
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		prettyPrefix = prettyPrefix[:-1]
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	env['CCCOMSTR'] = "Compiling C (%s): $TARGET" % prettyPrefix
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	env['CXXCOMSTR'] = "Compiling C++ (%s): $TARGET" % prettyPrefix
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	env['ASCOMSTR'] = "Assembling (%s): $TARGET" % prettyPrefix
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	env['ASPPCOMSTR'] = "Assembling (%s): $TARGET" % prettyPrefix
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	env['LINKCOMSTR'] = "Linking (%s): $TARGET" % prettyPrefix
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def generate(env, **kw):
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	prefix = env['TOOL_PREFIX']
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	setup_gnu_tools(env, prefix)
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def exists(env):
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	prefix = env['TOOL_PREFIX']
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	return env.Detect('%s-gcc' % prefix)