linux-stable/include/linux/compiler-version.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifdef  __LINUX_COMPILER_VERSION_H
#error "Please do not include <linux/compiler-version.h>. This is done by the build system."
#endif
#define __LINUX_COMPILER_VERSION_H

/*
 * This header exists to force full rebuild when the compiler is upgraded.
 *
 * When fixdep scans this, it will find this string "CONFIG_CC_VERSION_TEXT"
 * and add dependency on include/config/cc/version/text.h, which is touched
 * by Kconfig when the version string from the compiler changes.
 */
kbuild: rebuild GCC plugins when the compiler is upgraded Linus reported a build error due to the GCC plugin incompatibility when the compiler is upgraded. [1] GCC plugins are tied to a particular GCC version. So, they must be rebuilt when the compiler is upgraded. This seems to be a long-standing flaw since the initial support of GCC plugins. Extend commit 8b59cd81dc5e ("kbuild: ensure full rebuild when the compiler is updated"), so that GCC plugins are covered by the compiler upgrade detection. [1]: https://lore.kernel.org/lkml/CAHk-=wieoN5ttOy7SnsGwZv+Fni3R6m-Ut=oxih6bbZ28G+4dw@mail.gmail.com/ Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> 2021-03-04 11:37:08 +00:00			`/* SPDX-License-Identifier: GPL-2.0-only */`

			`#ifdef __LINUX_COMPILER_VERSION_H`
			`#error "Please do not include <linux/compiler-version.h>. This is done by the build system."`
			`#endif`
			`#define __LINUX_COMPILER_VERSION_H`

			`/*`
			`* This header exists to force full rebuild when the compiler is upgraded.`
			`*`
			`* When fixdep scans this, it will find this string "CONFIG_CC_VERSION_TEXT"`
			`* and add dependency on include/config/cc/version/text.h, which is touched`
			`* by Kconfig when the version string from the compiler changes.`
			`*/`