Quote:
Originally Posted by pedrosacosta
In a Makefile,
1 - what means the following lines:
Code:
%.bin: %.elf<-- What means %.<anything>?
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That is how you define a rule to build an arbitrary .bin file. For example, if you wanted to build "blah.bin", you could type "make blah.bin" and the make file would use this rule.
Quote:
Originally Posted by pedrosacosta
Code:
objcopy -Obinary $*.elf $*.bin<--What means $*?
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$* evaluates to the base file name of the target. For example, if you were building "blah.bin", $* would be "blah".
Quote:
Originally Posted by pedrosacosta
Code:
floppy.img: $(PROG).bin
dd if=/dev/zero of=$@ count=2880
dd if=$< of=$@ conv=notrunc<-- What means $< and $@ ?
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$< is the name of the first dependency file (in this case "$(PROG).bin") and $@ is the name of the target (in this case "floppy.img").
Quote:
Originally Posted by pedrosacosta
2 - This symbols are called environment variables?
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I do not really understand this question.
