boot/at91bootstrap3: fix build with host GCC 15

Building at91bootstrap3 with GCC 15 fails with:

    include/types.h:23:23: error: ‘bool’ cannot be defined via ‘typedef’
       23 | typedef unsigned char bool;
          |                       ^~~~
    include/types.h:23:23: note: ‘bool’ is a keyword with ‘-std=c23’ onwards

This is due to GCC 15 defaulting to the C23 language dialect.

Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
(cherry picked from commit 500678593f)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

boot/at91bootstrap3/v3.10.3/0001-include-types.h-conditionally-define-bool-false-and-.patch

@@ -0,0 +1,47 @@
+From 908c65678867565a934ea5a967bfe7e204d1ccaf Mon Sep 17 00:00:00 2001
+From: Edgar Bonet <bonet@grenoble.cnrs.fr>
+Date: Wed, 25 Jun 2025 11:13:43 +0200
+Subject: [PATCH] include/types.h: conditionally define bool, false and true
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+include/types.h typedefs ‘bool’ and macro-defines ‘false’ and ‘true’.
+However, since C23, these are predefine keywords. As C23 is the default
+C dialect for GCC 15, building with this compiler fails with:
+
+    include/types.h:23:23: error: ‘bool’ cannot be defined via ‘typedef’
+       23 | typedef unsigned char bool;
+          |                       ^~~~
+    include/types.h:23:23: note: ‘bool’ is a keyword with ‘-std=c23’ onwards
+
+Fix this build failure by only defining ‘bool’, ‘false’ and ‘true’ on C
+dialects older than C23.
+
+Upstream: https://github.com/linux4sam/at91bootstrap/pull/188
+[Edgar: backport to v3.10.3]
+
+Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
+---
+ include/types.h | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/include/types.h b/include/types.h
+index 1246a4df..2c1a41cf 100644
+--- a/include/types.h
++++ b/include/types.h
+@@ -42,8 +42,11 @@ typedef signed long long s64;
+ typedef unsigned long size_t;
+ typedef signed long ssize_t;
+ 
++/* bool, false and true are predefined since C23. */
++#if __STDC_VERSION__ < 202311L
+ typedef unsigned char bool;
+ #define false	0U
+ #define true	1U
++#endif
+ 
+ #endif /* TYPES_H_ */
+-- 
+2.43.0
+

boot/at91bootstrap3/v4.0.0/0001-include-types.h-conditionally-define-bool-false-and-.patch

@@ -0,0 +1,46 @@
+From 4aab60e634d588dffbd3154fd0cfce78272b750a Mon Sep 17 00:00:00 2001
+From: Edgar Bonet <bonet@grenoble.cnrs.fr>
+Date: Wed, 25 Jun 2025 11:13:43 +0200
+Subject: [PATCH] include/types.h: conditionally define bool, false and true
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+include/types.h typedefs ‘bool’ and macro-defines ‘false’ and ‘true’.
+However, since C23, these are predefine keywords. As C23 is the default
+C dialect for GCC 15, building with this compiler fails with:
+
+    include/types.h:23:23: error: ‘bool’ cannot be defined via ‘typedef’
+       23 | typedef unsigned char bool;
+          |                       ^~~~
+    include/types.h:23:23: note: ‘bool’ is a keyword with ‘-std=c23’ onwards
+
+Fix this build failure by only defining ‘bool’, ‘false’ and ‘true’ on C
+dialects older than C23.
+
+Upstream: https://github.com/linux4sam/at91bootstrap/pull/188
+
+Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
+---
+ include/types.h | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/include/types.h b/include/types.h
+index 950b1a46..0ad9ae61 100644
+--- a/include/types.h
++++ b/include/types.h
+@@ -20,8 +20,11 @@ typedef signed long long s64;
+ typedef unsigned long size_t;
+ typedef signed long ssize_t;
+ 
++/* bool, false and true are predefined since C23. */
++#if __STDC_VERSION__ < 202311L
+ typedef unsigned char bool;
+ #define false	0U
+ #define true	1U
++#endif
+ 
+ #endif /* TYPES_H_ */
+-- 
+2.43.0
+