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package/xvisor: Use '-std=gnu11' to fix build with GCC 15

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Since Buildroot commit [1] "update to Bootlin toolchains 2025.08-1",
the TestXvisor fails when building xvisor with gcc 15.1.0.

GCC 15 changed the default C standard version to C23 [2], resulting in
errors from the xvisor definitions of bool from core/include/vmm_types.h,
which is a reserved keyword under C23.

Since CFLAGS are hardcoded in the main Makefile, add '-std=gnu11' to
'cflags' to resolve the error.

[1] 947dbc92a2
[2] https://gcc.gnu.org/gcc-15/porting_to.html

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/11042295047

Cc: Julien Olivain <ju.o@free.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Romain Naour
2025-08-24 19:18:21 +02:00
committed by Julien Olivain
parent b4d8147a95
commit 358b4116c7
1 changed files with 40 additions and 0 deletions
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40
package/xvisor/0003-Makefile-Use-std-gnu11-to-fix-build-with-GCC-15.patch Normal file
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@@ -0,0 +1,40 @@
From 53a53af30ce1704b7de806a51d822472fbcc57de Mon Sep 17 00:00:00 2001
From: Romain Naour <romain.naour@smile.fr>
Date: Sun, 24 Aug 2025 18:26:52 +0200
Subject: [PATCH] Makefile: Use '-std=gnu11' to fix build with GCC 15
GCC 15 changed the default C standard version to C23 [1], resulting in
errors from the xvisor definitions of bool from core/include/vmm_types.h,
which is a reserved keyword under C23.
Since CFLAGS are hardcoded in the main Makefile, add '-std=gnu11' to
'cflags' to resolve the error.
[1] https://gcc.gnu.org/gcc-15/porting_to.html
Upstream: https://github.com/xvisor/xvisor/pull/200
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/11042295047
Signed-off-by: Romain Naour <romain.naour@smile.fr>
---
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 1984408c..8731ece0 100644
--- a/Makefile
+++ b/Makefile
@@ -166,7 +166,7 @@ cppflags+=-I$(libs_dir)/include
cppflags+=$(cpu-cppflags)
cppflags+=$(board-cppflags)
cppflags+=$(libs-cppflags-y)
-cflags=-g -Wall -nostdlib --sysroot=$(drivers_dir)/include -fno-builtin -fno-stack-protector -D__VMM__
+cflags=-std=gnu11 -g -Wall -nostdlib --sysroot=$(drivers_dir)/include -fno-builtin -fno-stack-protector -D__VMM__
cflags+=$(board-cflags)
cflags+=$(cpu-cflags)
cflags+=$(libs-cflags-y)
--
2.50.1