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kbuild: uapi: provide a C++ compatible dummy definition of NULL

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NULL works differently in C++ compared to C.

To allow testing the UAPI headers against C++ compilers, provide
a variant of NULL which works with those.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260316-kbuild-uapi-c-v2-4-35d6d0ed863f@weissschuh.net
Signed-off-by: Nicolas Schier <nsc@kernel.org>
This commit is contained in:
Thomas Weißschuh
2026-03-16 17:52:01 +01:00
committed by Nicolas Schier
parent b4ec38cb73
commit b187c1a1a0
1 changed files with 5 additions and 0 deletions
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5
usr/dummy-include/stddef.h
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@@ -3,6 +3,11 @@
#define _DUMMY_STDDEF_H
#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#endif /* _DUMMY_STDDEF_H */