[SOLVED] Question for $(wildcard) on Makefile

poplinux · 03-16-2015, 03:55 AM

Dear Sir.

I'm want to use the $(wildcard) on my Makefile.

But i have a problem use the $(wildcard)

My directory is see below

Code:

$ > ls
1.c 2.c 3.c

My Makefile is see below.

Code:

$ > vi Makefile

SRC1="1.c"
SRC2="2.c"
SRC3="3.c"

STRING1=$(wildcard 1.c 2.c 3.c)
STRING2=$(wildcard *.c)
STRING3=$(wildcard $(SRC1) $(SRC2) $(SRC3))

all:
  @echo "STRING1 $(STRING1)"
  @echo "STRING2 $(STRING2)"
  @echo "STRING3 $(STRING3)"

And execute my Makefile

Code:

$ > make
STRING1 1.c 2.c 3.c
STRING2 1.c 2.c 3.c
STRING3

Quesiton
1. Why can't see the STRING3 ?
2. How can see the STRING3 ?

Thank you.

NevemTeve · 03-16-2015, 04:15 AM

It's the "quotes". Fixed:

Code:

SRC1 = 1.c
SRC2 = 2.c
SRC3 = 3.c

STRING1 = $(wildcard 1.c 2.c 3.c)
STRING2 = $(wildcard *.c)
STRING3 = $(wildcard $(SRC1) $(SRC2) $(SRC3))

all:
	@echo "STRING1 $(STRING1)"
	@echo "STRING2 $(STRING2)"
	@echo "STRING3 $(STRING3)"

poplinux · 03-16-2015, 04:24 AM

Dear NevemTeve.

Thank's your advice. It is very helpful for me.

But, my Make file can't ignore "quotes".

So, I'm resolved use this way.

Code:

SRC1="1.c"
SRC2="2.c"
SRC3="3.c"

STRING1=$(wildcard 1.c 2.c 3.c)
STRING2=$(wildcard *.c)
STRING3=$(wildcard $(subst ",,$(SRC1)) $(subst ",,$(SRC2)) $(subst ",,$(SRC3)))

all:
  @echo "STRING1 $(STRING1)"
  @echo "STRING2 $(STRING2)"
  @echo "STRING3 $(STRING3)"

Thank you.

NevemTeve · 03-16-2015, 04:55 AM

Certainly, make doesn't ignore quotes. You added quotes where they didn't belong. Another example:

Code:

WITHOUT = I do not have qoutes
WITH    = "I have quotes"

all:
	printf 'WITHOUT=%s\nWITH=%s\n' '${WITHOUT}' '${WITH}'