Hi, On Sat, Sep 17, 2016 at 07:11:56PM -0400, Selva Nair wrote: > On Sat, Sep 17, 2016 at 9:20 AM, Gert Doering <g...@greenie.muc.de> wrote: > > > In -std=c99 mode, WIN32 is not defined to be "1" anymore, but just > > "#define WIN32" - so the "#if WIN32" breaks, needs to be "#ifdef WIN32" > > Indeed... > > To depend on the compiler or system headers to define WIN32 was not a great > idea anyway. Using _WIN32 or __WIN32 is probably more reliable. Or we > should define WIN32 in config.h. With std=c99, it seems WIN32 gets defined > by chance through some header pulled-in by syshead.h -- not something one > can rely on.
Heiko says that "WIN32 is what everybody is testing for on Windows", so
that seems to be an official API define...
With c99, on mingw, the #define WIN32 comes from "minwindef.h", which
is included from "windef.h", which is included from "windows.h" -- but
I wonder how we ever include that in the first place, given this
code in syshead.h
#ifdef WIN32
#include <windows.h>
#include <winsock2.h>
#define sleep(x) Sleep((x)*1000)
#define random rand
#define srandom srand
#endif
... so maybe it is actually *never* set, even with my patch, and we just
do not know it's breaking because it's not linking...?
Ah. Here we go... trying to redefine WIN32 at the end of syshead.h
shows what is happening:
In file included from /usr/share/mingw-w64/include/windef.h:8:0,
from /usr/share/mingw-w64/include/windows.h:69,
from /usr/share/mingw-w64/include/winsock2.h:23,
from ../../src/compat/compat.h:29,
from syshead.h:28,
so compat.h is pulling it via
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
whee...
> Compiler-defined macros with std=c99:
> $ x86_64-w64-mingw32-gcc -std=c99 -E -dM - </dev/null | grep WIN32
> #define _WIN32 1
> #define __WIN32 1
> #define __WIN32__ 1
>
> As for a quick fix, the patch takes care of misc.c, but there is an issue
> with block_dns.c as well. It does not include the required config.h and
> syshead.h at the top before #ifdef WIN32, so now the whole file gets
> skipped -- mea culpa, mea culpa...
>
> I think we can just remove #ifdef WIN32 from block_dns.c (its compiled only
> on Windows), and add config.h and syshead.h headers at the top. Then we
> also need -I$(top_srcdir)/src/compat in src/openvpnsev/Makefile.am as
> compat.h is included by syshead.h.
Do you have time to cook up & test such a patch? Then I'll go and focus
a bit more on my windows testing environment in the meantime, and merge
the patch later today...
thanks,
gert
--
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//www.muc.de/~gert/
Gert Doering - Munich, Germany g...@greenie.muc.de
fax: +49-89-35655025 g...@net.informatik.tu-muenchen.de
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