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Message-ID:	<779F20BCCE5AD31186A50008C75D9979171746@silldn_mail1.sanwaint.com>
From:	"Fifer, Eric" <EFifer AT sanwaint DOT com>
To:	"'cygwin-developers AT sourceware DOT cygnus DOT com'"
	<cygwin-developers AT sourceware DOT cygnus DOT com>
Subject:	RE: _impure_ptr uninitialized in DLLs?
Date:	Wed, 12 Jul 2000 19:03:07 +0100
MIME-Version:	1.0
X-Mailer:	Internet Mail Service (5.5.2650.21)

>This should be fixed in CVS now.  It will require updating libcygwin.a.

I'm still having problems.  The dlopen() flavor works now, but when
linking against a normal DLL, environ is NULL in the main program.

Here's another demonstration:

d.c:

#include <unistd.h>

int __declspec(dllexport) d()
{
    printf("in d\n");
    printf("environ=%x\n", environ);
}

m.c:

#include <unistd.h>

main(int argc, char **argv, char **envp) {
    printf("envp=%x\n", envp);
    printf("environ=%x\n", environ);
    d();
    printf("environ=%x\n", environ);
}

build:

gcc -g -c d.c
dllwrap --output-lib libd.a --dllname libd.dll d.o
gcc -g -c m.c
gcc -o m m.o -L. -Wl,--Bstatic -ld -Wl,--Bdynamic

run:

envp=a040008
environ=0
in d
environ=a040008
environ=0

Thanks,

Eric Fifer

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