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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: gcc_centric C code
Date: Wed, 25 Apr 2018 18:28:44 -0700
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bartc <bc@freeuk.com> writes:
[...]
> Using Pellec C on the same file:
>
> c:\ps\src\lib\xpost_compat.c(217): error #2168: Operands of '=' have 
> incompatible types 'unsigned long long int' and 'void *'.
>
> Same error on lccwin32, and similar on MSVC. Line 217 is:
>
>     HCRYPTPROV provider = NULL;
>
> If HCRYPTPROV is unsigned long long, then this is an error because the 
> RHS is a void*, and the LHS is an int.
>
> In gcc apparently this is normally just a warning, but in this context, 
> I didn't even get that for some reason.

NULL can be of type void* or of any integer type.  If the standard
headers have
    #define NULL 0
then
    unsigned long long provider = NULL;
is legal (but a bad idea, since NULL should be used only in a pointer
context).

[...]

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"