[Clam-devel] Embedding files into binaries

[David García Garzón]

Just for my reference and whoever who is interested, a proof of concept on how 
to embed files into an executable using binutils. I hope to write a blog 
entry soon on this.

SConstruct seems too complex. This is to fix the symbol name that the tool 
generates. It contains the relative path to the file and made the symbol name 
dependant on where do you place it. All that code removes the path but i hope 
i can simplify that.

Being so feasible, this brings also the ladspa-on-click (and the 
Jack-on-click) nearer.

David.

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Hola Mundo!!
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import os
def renameEmbededFileSymbols(source, target, env) :
	""" Remove the path part of the symbol name for the embeded file"""
	objdumpOutput=os.popen("objdump -x %s | grep _binary'.*'start"%target[0] , "r").read()
	startSymbol=objdumpOutput.split()[-1]
	infix = startSymbol[len('_binary_'):-len("_start")]
	baseName = os.path.split(str(source[0]))[-1]
	newInfix = infix[-len(baseName):]
	return Execute("objcopy %(target)s "
		"--redefine-sym _binary_%(infix)s_start=_binary_%(newInfix)s_start "
		"--redefine-sym _binary_%(infix)s_end=_binary_%(newInfix)s_end "
		"--redefine-sym _binary_%(infix)s_size=_binary_%(newInfix)s_size " % {
			"infix": infix,
			"newInfix": newInfix,
			"target": target[0],
		}
	)

embededFileBuilder = Builder(
	action=Action([
		["ld", "-r", "-b", "binary", "-o", "$TARGET", "$SOURCE"],
		renameEmbededFileSymbols,
		],
		),
	suffix='.o',
	)

env = Environment()
env['BUILDERS']['EmbededFile']=embededFileBuilder


env.Program('testingEmbededFile', [
	'fileembed.cxx', 
	env.EmbededFile('holaMundo.txt')
	])