5 files changed, 40 insertions, 8 deletions
diff --git a/tools/include/linux/build_bug.h b/tools/include/linux/build_bug.h
index cc7070c7439b..ce365d212768 100644
--- a/tools/include/linux/build_bug.h
+++ b/tools/include/linux/build_bug.h
@@ -79,4 +79,9 @@
 #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
 #endif // static_assert
 
+#ifdef __GENKSYMS__
+/* genksyms gets confused by _Static_assert */
+#define _Static_assert(expr, ...)
+#endif
+
 #endif	/* _LINUX_BUILD_BUG_H */
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index d22a974372c0..ff872dc2637c 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -2,9 +2,7 @@
 #ifndef _TOOLS_LINUX_COMPILER_H_
 #define _TOOLS_LINUX_COMPILER_H_
 
-#ifdef __GNUC__
-#include <linux/compiler-gcc.h>
-#endif
+#include <linux/compiler_types.h>
 
 #ifndef __compiletime_error
 # define __compiletime_error(message)
diff --git a/tools/include/linux/compiler_types.h b/tools/include/linux/compiler_types.h
new file mode 100644
index 000000000000..feea09029f61
--- /dev/null
+++ b/tools/include/linux/compiler_types.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_TYPES_H
+#define __LINUX_COMPILER_TYPES_H
+
+/* Builtins */
+
+/*
+ * __has_builtin is supported on gcc >= 10, clang >= 3 and icc >= 21.
+ * In the meantime, to support gcc < 10, we implement __has_builtin
+ * by hand.
+ */
+#ifndef __has_builtin
+#define __has_builtin(x) (0)
+#endif
+
+/* Compiler specific macros. */
+#ifdef __GNUC__
+#include <linux/compiler-gcc.h>
+#endif
+
+#endif /* __LINUX_COMPILER_TYPES_H */
diff --git a/tools/include/linux/ctype.h b/tools/include/linux/ctype.h
index 310090b4c474..29ed3fe94404 100644
--- a/tools/include/linux/ctype.h
+++ b/tools/include/linux/ctype.h
@@ -2,6 +2,8 @@
 #ifndef _LINUX_CTYPE_H
 #define _LINUX_CTYPE_H
 
+#include <linux/compiler.h>
+
 /*
  * NOTE! This ctype does not handle EOF like the standard C
  * library is required to.
@@ -23,11 +25,6 @@ extern const unsigned char _ctype[];
 #define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)
 #define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)
 #define iscntrl(c)	((__ismask(c)&(_C)) != 0)
-static inline int __isdigit(int c)
-{
-	return '0' <= c && c <= '9';
-}
-#define isdigit(c)	__isdigit(c)
 #define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)
 #define islower(c)	((__ismask(c)&(_L)) != 0)
 #define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
@@ -40,6 +37,16 @@ static inline int __isdigit(int c)
 #define isascii(c) (((unsigned char)(c))<=0x7f)
 #define toascii(c) (((unsigned char)(c))&0x7f)
 
+#if __has_builtin(__builtin_isdigit)
+#define  isdigit(c) __builtin_isdigit(c)
+#else
+static inline int __isdigit(int c)
+{
+	return '0' <= c && c <= '9';
+}
+#define  isdigit(c) __isdigit(c)
+#endif
+
 static inline unsigned char __tolower(unsigned char c)
 {
 	if (isupper(c))
diff --git a/tools/include/linux/string.h b/tools/include/linux/string.h
index 5e9e781905ed..db5c99318c79 100644
--- a/tools/include/linux/string.h
+++ b/tools/include/linux/string.h
@@ -46,4 +46,5 @@ extern char * __must_check skip_spaces(const char *);
 
 extern char *strim(char *);
 
+extern void *memchr_inv(const void *start, int c, size_t bytes);
 #endif /* _TOOLS_LINUX_STRING_H_ */