Date: Wed, 15 Aug 2001 18:04:09 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: "Patrick Mitran" <pmitran AT tsp DOT ece DOT mcgill DOT ca>
Message-Id: <8582-Wed15Aug2001180409+0300-eliz@is.elta.co.il>
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CC: djgpp AT delorie DOT com
In-reply-to: <ijve7.2399$lc6.1621461@carnaval.risq.qc.ca>
	(pmitran AT tsp DOT ece DOT mcgill DOT ca)
Subject: Re: Makefiles with DJGPP
References:  <ijve7.2399$lc6 DOT 1621461 AT carnaval DOT risq DOT qc DOT ca>
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> From: "Patrick Mitran" <pmitran AT tsp DOT ece DOT mcgill DOT ca>
> Newsgroups: comp.os.msdos.djgpp
> 
> LDLIBS = -lm -lstdcxx
> 
> in my makefile. In DJGPP, this links fine, no problem. In linux, I would
> need
> the second library to be -lstdc++ instead. How can I make the makefile
> detect the build environment and choose the right library?

Test inside the Makefile for the DJDIR variable being defined:

ifeq ($(DJDIR),)
LIBSTDCXX = -lstdc++
else
LIBSTDCXX = -lstdcxx
endif

then use $(LIBSTDCXX) instead of the literal -lstdcxx.

Of course, if someone sets the environment variable DJDIR on
GNU/Linux, you are toast; but why would they?