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Re: [PROGRAMMERING] [MAKE ] undgå rebuild

To: sslug@sslug
Subject: Re: [PROGRAMMERING] [MAKE ] undgå rebuild
From: Anders Thøgersen <sslug@sslug>
Date: Sun, 1 Jun 2008 02:35:18 +0200
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References: <sslug@sslug> <sslug@sslug> <sslug@sslug> <sslug@sslug>
User-agent: Mutt/1.5.13 (2006-08-11)

Hej,

On 14:47 Sat 31 May 2008, Kristian Nørgaard wrote:
> >---
> >all: libs mit_target
> >
> >libs:
> >	$(MAKE) -C ../lib1
> >	$(MAKE) -C ../lib2
> >
> >mit_target: $(OBJ)
> >	$(CC) $< -o $@
> >---
> 
> hmmm, jeg har været der.
> Men den løsning betyder at
> "make mit_target"
> så ikke kan bruges med sikkerhed for korrekt build.
> 
> og at forlade sig på default target ("all" ) er ikke fedt, ikke mindst 
> hvis makefilen håndterer flere targets og du ikke vil bygge alle.

Det target der står øverst i makefilen er default.  Du kunne også have:

---
flap: libs foo

libs:
	$(MAKE) -C ../lib1
	$(MAKE) -C ../lib2

foo:foo.c
	$(CC) $< -o $@
---

> 
> >Så vidt jeg husker er det vigtigt at man bruger $(MAKE) variablen til at
> >kalde make fra makefiler.
> 
> Du har ret, jeg har sjusket lidt.
> shame on me.
> 
> /Kristian
> 
>

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