-mno-cygwin and "undefined reference to `_impure_ptr'"?

[Ronald Landheer-Cieslak]

On Thu, 10 Apr 2003, Lester Ingber wrote:
> Thanks for your reply.
> 
> There must be some math library?  This is needed for
> #include <math.h>
> in all C packages I've seen.  How can simple functions like sqrt()
> be calculated?
> 
> Lester
"Have a go at it (tm)": just try compiling it without the -lm - I'll bet
it will just make your headache go away.

AFAIK, I've never used -lm on MinGW, even for projects that needed it on
other platforms

rlc

> On Thu, Apr 10, 2003 at 12:14:05PM +0200, Ronald Landheer-Cieslak wrote:
> : Date: Thu, 10 Apr 2003 12:14:05 +0200 (CEST)
> : From: Ronald Landheer-Cieslak <ronald@landheer.com>
> : To: Lester Ingber <ingber@ingber.com>
> : cc: cygwin@cygwin.com
> : Subject: Re: -mno-cygwin and "undefined reference to `_impure_ptr'"?
> : In-Reply-To: <20030410060338.GA344@ingber.com>
> : 
> : On Thu, 10 Apr 2003, Lester Ingber wrote:
> : [snip]
> : > gcc -shared -mno-cygwin -o asadll.dll -Wl,--out-implib=libasadll.dll.a
> : > -Wl,--export-all-symbols -Wl,--export-dynamic -Wl,--add-stdcall-alias
> : > -Wl,--enable-auto-import -Wl,--whole-archive asa.o asa_usr.o
> : > asa_usr_cst.o -Wl,--no-whole-archive -lm
> :                                        ^^^
> : See if this is not something linked with Cygwin 
> : 
> : [snip]
> : 
> : AFAIK, there is no libm.a in the MinGW pack, so the libm.a you're pulling 
> : in links you to something linked to Cygwin.. you'll have to get rid of it.
> : 
> : HTH
> : 
> : rlc
> : 
> 
> 


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