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From: "Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp-workers AT delorie DOT com]" <djgpp-workers AT delorie DOT com>
Date: Fri, 14 Sep 2018 23:37:55 +0300
Message-ID: <CAA2C=vC3QjRNs_sLrQQSVKTKqY9L8gJ6+4uzyF_ceo6AOfGejA@mail.gmail.com>
Subject: Re: stdbool.h
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On 9/14/18, Ozkan Sezer <sezeroz AT gmail DOT com> wrote:
> On 9/14/18, Ozkan Sezer <sezeroz AT gmail DOT com> wrote:
>> On 9/14/18, Eli Zaretskii (eliz AT gnu DOT org) [via
>> djgpp-workers AT delorie DOT com] <djgpp-workers AT delorie DOT com> wrote:
>>>> From: "Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp-workers AT delorie DOT com]"
>>>> <djgpp-workers AT delorie DOT com>
>>>> Date: Fri, 14 Sep 2018 21:58:26 +0300
>>>>
>>>> Why do we need to provide a stdbool.h among djgpp includes? Gcc >= 3.0
>>>> already provides it, and looking at deleted/v2gnu/ our own gcc302b.zip
>>>> and gcc31b.zip do have it.
>>>
>>> I may be misremembering or mixing things up (it's been a while), but
>>> could it have something to do with the "freestanding" support?
>>>
>>
>> That may be, yes.  In that case, it is still broken for gcc < 3.0
>
> I just tested building a test case like
> #include <stdbool.h>
> bool _foo = true;
>
> .. with
>   gcc -ffreestanding -Wall -W -c 0.c
>
> .. and it does not fail, i.e. gcc-provided stdbool.h is still available
> in -ffreestanding mode.
>

In any case, I suggest the patch below for stdbool.h.
Comments?

diff -u -r1.3 stdbool.h
--- stdbool.h	2 May 2015 07:31:48 -0000	1.3
+++ stdbool.h	14 Sep 2018 20:36:12 -0000
@@ -5,9 +5,21 @@
 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
   || !defined(__STRICT_ANSI__) || defined(__cplusplus)

+#if (__GNUC__ < 3)
+typedef unsigned char _Bool;
+#endif
+
+#if !defined(__cplusplus)
 #define bool _Bool
 #define true 1
 #define false 0
+#else
+#define _Bool bool
+#define bool bool
+#define false false
+#define true true
+#endif
+
 #define __bool_true_false_are_defined 1

 #endif /* (__STDC_VERSION__ >= 199901L) || !__STRICT_ANSI__ */