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tools include: Adopt __compiletime_error

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From the kernel, get the gcc one and provide the fallback so that we can
continue build with other compilers, such as with clang.

Will be used by tools/arch/x86/include/asm/cmpxchg.h.

Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Elena Reshetova <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-02-22 16:48:24 -03:00
commit 4900653829
2 changed files with 8 additions and 0 deletions
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4
tools/include/linux/compiler-gcc.h
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@ -12,3 +12,7 @@
#if GCC_VERSION >= 70000 && !defined(__CHECKER__)
# define __fallthrough __attribute__ ((fallthrough))
#endif
#if GCC_VERSION >= 40300
# define __compiletime_error(message) __attribute__((error(message)))
#endif /* GCC_VERSION >= 40300 */

4
tools/include/linux/compiler.h
View file

@ -5,6 +5,10 @@
#include <linux/compiler-gcc.h>
#endif
#ifndef __compiletime_error
# define __compiletime_error(message)
#endif
/* Optimization barrier */
/* The "volatile" is due to gcc bugs */
#define barrier() __asm__ __volatile__("": : :"memory")