Re: [PATCH] compat/regex: fix compilation on Windows

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

On 12/05/17 11:25, Johannes Schindelin wrote:
> Hi Junio,
> 
> On Fri, 12 May 2017, Junio C Hamano wrote:
> 
>> Johannes Schindelin <johannes.schindelin@gmx.de> writes:
>>
>>> The real issue here is that GNU awk's regex implementation assumes a
>>> bit too much about the relative sizes of pointers and long integers.
>>> What they really want is to use intptr_t.
>>
>> Good.  I got annoyed enough to do the same myself before opening my
>> mailbox.  One thing that is curious about your version is that it still
>> has "#include <stdint.h>" behind HAVE_STDINT_H; when I tried to compile
>> an equivalent of your change last night, the compilation failed because
>> intptr_t wasn't available without exposing <stdint.h>
>>
>> Where is Windows build getting its intptr_t, I wonder.
> 
> I'd place a bet on this part of compat/mingw.h for GCC builds:
> 
> 	#ifdef __MINGW64_VERSION_MAJOR
> 	#include <stdint.h>
> 	#include <wchar.h>
> 	typedef _sigset_t sigset_t;
> 	#endif
> 
> and on this part of git-compat-util.h for MSVC builds:
> 
> 	#ifndef NO_INTTYPES_H
> 	#include <inttypes.h>
> 	#else
> 	#include <stdint.h>
> 	#endif
> 
> For the record, it seems that our current version of compat/regex/regex.c
> has this:
> 
> 	/* On some systems, limits.h sets RE_DUP_MAX to a lower value than
> 	   GNU regex allows.  Include it before <regex.h>, which correctly
> 	   #undefs RE_DUP_MAX and sets it to the right value.  */
> 	#include <limits.h>
> 	#include <stdint.h>
> 
> while the one in `pu` lacks the last line. That may be the reason why
> things compiled neatly before, and stopped working for you now.

Yep, see commit bd8f005583. ;-P

So, sparse is, once again, complaining about the SIZE_MAX macro
redefinition. (Along with two other warnings, one of which is a
_very_ long standing warning and one of which is new - I have
yet to investigate).

ATB,
Ramsay Jones