u-boot/include/linux/stddef.h

#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H

#include <linux/compiler_types.h>

#undef NULL
#if defined(__cplusplus)
#define NULL 0
#else
#define NULL ((void *)0)
#endif

#ifndef _SIZE_T
#include <linux/types.h>
#endif

#ifndef __CHECKER__
#undef offsetof
#ifdef __compiler_offsetof
#define offsetof(TYPE, MEMBER)	__compiler_offsetof(TYPE, MEMBER)
#else
#define offsetof(TYPE, MEMBER)	((size_t)&((TYPE *)0)->MEMBER)
#endif
#endif

#endif
Initial revision 2002-03-31 12:34:56 +00:00			`#ifndef _LINUX_STDDEF_H`
			`#define _LINUX_STDDEF_H`

stddef: Avoid warning with clang with offsetof() Some bright sparks have decided that a cast on a constant cannot be a constant, so offsetof() produces this warning on clang-10: include/intel_gnvs.h:113:1: error: static_assert expression is not an integral constant expression check_member(acpi_global_nvs, unused2, GNVS_CHROMEOS_ACPI_OFFSET); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:284:2: note: expanded from macro 'check_member' offsetof(struct structure, member) == (offset), \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/stddef.h:20:32: note: expanded from macro 'offsetof' ^ include/intel_gnvs.h:113:1: note: cast that performs the conversions of a reinterpret_cast is ot allowed in a constant expression include/linux/stddef.h:20:33: note: expanded from macro 'offsetof' Fix it by using the compiler built-in version, if available. This syncs the function to the same implementation as Linux v5.16 in this header file. Signed-off-by: Simon Glass <sjg@chromium.org> 2022-01-13 13:47:55 +00:00			`#include <linux/compiler_types.h>`

Initial revision 2002-03-31 12:34:56 +00:00			`#undef NULL`
			`#if defined(__cplusplus)`
			`#define NULL 0`
			`#else`
			`#define NULL ((void *)0)`
			`#endif`

			`#ifndef _SIZE_T`
			`#include <linux/types.h>`
			`#endif`

include/linux/stddef.h: avoid 'warning: preprocessor token offsetof redefined' hack to avoid: /opt/gcc-4.6.3-nolibc/powerpc-linux/bin/../lib/gcc/powerpc-linux/4.6.3/include/stddef.h:413:9: warning: preprocessor token offsetof redefined u-boot/include/linux/stddef.h:20:9: this was the original definition tried protecting with __KERNEL__, and #including compiler.h first. Even tried include dir reordering to no avail: +++ b/config.mk @@ -194,7 +194,11 @@ OBJCFLAGS += --gap-fill=0xff gccincdir := $(shell $(CC) -print-file-name=include) CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ - -D__KERNEL__ + -D__KERNEL__ \ + -I $(gccincdir) \ + -nostdinc + +# -isystem $(gccincdir) \ # Enable garbage collection of un-used sections for SPL ifeq ($(CONFIG_SPL_BUILD),y) @@ -227,8 +231,7 @@ CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include endif CPPFLAGS += -I$(TOPDIR)/include -CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ - -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) +CPPFLAGS += -fno-builtin -ffreestanding -pipe $(PLATFORM_CPPFLAGS) Signed-off-by: Kim Phillips <kim.phillips@freescale.com> 2012-10-29 13:34:26 +00:00			`#ifndef __CHECKER__`
Initial revision 2002-03-31 12:34:56 +00:00			`#undef offsetof`
stddef: Avoid warning with clang with offsetof() Some bright sparks have decided that a cast on a constant cannot be a constant, so offsetof() produces this warning on clang-10: include/intel_gnvs.h:113:1: error: static_assert expression is not an integral constant expression check_member(acpi_global_nvs, unused2, GNVS_CHROMEOS_ACPI_OFFSET); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:284:2: note: expanded from macro 'check_member' offsetof(struct structure, member) == (offset), \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/stddef.h:20:32: note: expanded from macro 'offsetof' ^ include/intel_gnvs.h:113:1: note: cast that performs the conversions of a reinterpret_cast is ot allowed in a constant expression include/linux/stddef.h:20:33: note: expanded from macro 'offsetof' Fix it by using the compiler built-in version, if available. This syncs the function to the same implementation as Linux v5.16 in this header file. Signed-off-by: Simon Glass <sjg@chromium.org> 2022-01-13 13:47:55 +00:00			`#ifdef __compiler_offsetof`
			`#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)`
			`#else`
			`#define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER)`
			`#endif`
include/linux/stddef.h: avoid 'warning: preprocessor token offsetof redefined' hack to avoid: /opt/gcc-4.6.3-nolibc/powerpc-linux/bin/../lib/gcc/powerpc-linux/4.6.3/include/stddef.h:413:9: warning: preprocessor token offsetof redefined u-boot/include/linux/stddef.h:20:9: this was the original definition tried protecting with __KERNEL__, and #including compiler.h first. Even tried include dir reordering to no avail: +++ b/config.mk @@ -194,7 +194,11 @@ OBJCFLAGS += --gap-fill=0xff gccincdir := $(shell $(CC) -print-file-name=include) CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ - -D__KERNEL__ + -D__KERNEL__ \ + -I $(gccincdir) \ + -nostdinc + +# -isystem $(gccincdir) \ # Enable garbage collection of un-used sections for SPL ifeq ($(CONFIG_SPL_BUILD),y) @@ -227,8 +231,7 @@ CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include endif CPPFLAGS += -I$(TOPDIR)/include -CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ - -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) +CPPFLAGS += -fno-builtin -ffreestanding -pipe $(PLATFORM_CPPFLAGS) Signed-off-by: Kim Phillips <kim.phillips@freescale.com> 2012-10-29 13:34:26 +00:00			`#endif`
Initial revision 2002-03-31 12:34:56 +00:00
			`#endif`