MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur télécharger pdf (Page 113)

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Template Makefiles

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You can use pattern matching expressions to make the dependency rules more

general. For example, using GNU Make you could have replaced the two

"file1.o: file1.c"and"file2.o: file2.c" rules with the single rule:

%.o : %.c

cc −c $<

The $< is a special macro that equates to the dependency file (i.e., file1.c or

file2.c). Thus, using macros and the “%” pattern matching character, the

aboveexamplecanbereducedto:

SRCS = file1.c file2.c

OBJS = $(SRCS:.c=.o)

test: $(OBJS)

cc −o $@ $(OBJS)

%.o : %.c

cc −c $<

This example generates the list of objects (OBJS) from the list of sources (SRCS)

by using the string substitution feature for macro expansion. It replaces the

source file extension (

.c)withtheobjectfileextension(.o). This example also

generalized the build rule for the program,

test,tousethe“$@” special macro

that equates to the name of the current dependency target, in this case

test.

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MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur Page 113

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