These are needed for doing proper version checks, though feature detection via __has_attribute, __has_builtin, and __has_feature should be preferred, see: https://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros Also adds __diag support, for generating compiler version specific _Pragma()'s. __diag support based on commit 8793bb7f4a9d ("kbuild: add macro for controlling warnings to linux/compiler.h") Cc: stable@xxxxxxxxxxxxxxx # 4.17, 4.14, 4.9, 4.4 Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> --- include/linux/compiler-clang.h | 19 +++++++++++++++++++ include/linux/compiler_types.h | 4 ++++ 2 files changed, 23 insertions(+) diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index 7087446c24c8..9442e07a361e 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -7,6 +7,10 @@ * for Clang compiler */ +#define CLANG_VERSION (__clang_major__ * 10000 \ + + __clang_minor__ * 100 \ + + __clang_patchlevel__) + #ifdef uninitialized_var #undef uninitialized_var #define uninitialized_var(x) x = *(&(x)) @@ -46,3 +50,18 @@ __has_builtin(__builtin_sub_overflow) #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 #endif + +#define __diag_str1(s) #s +#define __diag_str(s) __diag_str1(s) +#define __diag(s) _Pragma(__diag_str(clang diagnostic s)) +#define __diag_CLANG_ignore ignored +#define __diag_CLANG_warn warning +#define __diag_CLANG_error error +#define __diag_CLANG(version, severity, s) \ + __diag_CLANG_ ## version(__diag_CLANG_ ## severity s) + +#if CLANG_VERSION >= 70000 +#define __diag_CLANG_7(s) __diag(s) +#else +#define __diag_CLANG_7(s) +#endif diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index a8ba6b04152c..a04e6bd63476 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -279,6 +279,10 @@ struct ftrace_likely_data { #define __diag_GCC(version, severity, string) #endif +#ifndef __diag_CLANG +#define __diag_CLANG(version, severity, string) +#endif + #define __diag_push() __diag(push) #define __diag_pop() __diag(pop) -- 2.18.0.345.g5c9ce644c3-goog
