On Sat, 12 Nov 2005 09:58:49 -0800, Jerry Gay wrote:
>
> the following output is snipped from parrot's build output with msvc-7.1:
> classes\env.pmc(26) : warning C4273: '__p__environ' : inconsistent dll linkage
> D:\usr\local\perl\bin\perl.exe build_tools\pmc2c.pl --c
> classes\env.pmc
> normally, i'm able to squash all compiler warnings, but i'm having
> trouble tracking this one down. this, by the way, is the *final*
> compiler warning with msvc, so the person who fixes this bug gets the
> 'clean windows' award :)
The story goes like this:
classes/env.pmc
extern char **environ;
Vc7/include/stdlib.h
#define environ _environ
#define _environ (*__p__environ())
_CRTIMP char *** __cdecl __p__environ(void);
#define _CRTIMP __declspec(dllimport)
So, F<classes/env.pmc> declares C<environ> without specific linkage,
whereas F<stdlib.h> says it should be imported from a DLL (namely
msvcrt71.dll). Hence the "inconsistent dll linkage" warning.
There are two possible solutions:
1) Don't declare C<environ> in F<classes/env.pmc>
2) "Correctly" declare C<environ> as
_CRTIMP extern char **environ;
Hope this helps,
Ron
