[openwrt/openwrt] kernel: fix tools build breakage on macos with x86

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/a7ae4ed0a3951c45d4a59ee575951b64ae4a23fb

commit a7ae4ed0a3951c45d4a59ee575951b64ae4a23fb
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Tue May 7 12:22:15 2024 +0200

    kernel: fix tools build breakage on macos with x86
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 .../generic/hack-6.6/200-tools_portability.patch   | 90 ++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/target/linux/generic/hack-6.6/200-tools_portability.patch b/target/linux/generic/hack-6.6/200-tools_portability.patch
new file mode 100644
index 0000000000..2ea8a68537
--- /dev/null
+++ b/target/linux/generic/hack-6.6/200-tools_portability.patch
@@ -0,0 +1,90 @@
+--- a/tools/scripts/Makefile.include
++++ b/tools/scripts/Makefile.include
+@@ -72,8 +72,6 @@ $(call allow-override,CXX,$(CROSS_COMPIL
+ $(call allow-override,STRIP,$(CROSS_COMPILE)strip)
+ endif
+ 
+-CC_NO_CLANG := $(shell $(CC) -dM -E -x c /dev/null | grep -Fq "__clang__"; echo $$?)
+-
+ ifneq ($(LLVM),)
+ HOSTAR  ?= $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
+ HOSTCC  ?= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
+@@ -84,6 +82,9 @@ HOSTCC  ?= gcc
+ HOSTLD  ?= ld
+ endif
+ 
++CC_NO_CLANG := $(shell $(CC) -dM -E -x c /dev/null | grep -Fq "__clang__"; echo $$?)
++HOSTCC_NO_CLANG := $(shell $(HOSTCC) -dM -E -x c /dev/null | grep -Fq "__clang__"; echo $$?)
++
+ # Some tools require Clang, LLC and/or LLVM utils
+ CLANG		?= clang
+ LLC		?= llc
+@@ -92,8 +93,9 @@ LLVM_OBJCOPY	?= llvm-objcopy
+ LLVM_STRIP	?= llvm-strip
+ 
+ ifeq ($(CC_NO_CLANG), 1)
+-EXTRA_WARNINGS += -Wstrict-aliasing=3
+-
++  ifeq ($(HOSTCC_NO_CLANG), 1)
++    EXTRA_WARNINGS += -Wstrict-aliasing=3
++  endif
+ else ifneq ($(CROSS_COMPILE),)
+ # Allow userspace to override CLANG_CROSS_FLAGS to specify their own
+ # sysroots and flags or to avoid the GCC call in pure Clang builds.
+--- a/tools/include/linux/types.h
++++ b/tools/include/linux/types.h
+@@ -56,6 +56,7 @@ typedef __s8  s8;
+ #define __user
+ #endif
+ #define __must_check
++#undef __cold
+ #define __cold
+ 
+ typedef __u16 __bitwise __le16;
+--- a/tools/objtool/include/objtool/objtool.h
++++ b/tools/objtool/include/objtool/objtool.h
+@@ -12,6 +12,7 @@
+ 
+ #include <objtool/elf.h>
+ 
++#undef __weak
+ #define __weak __attribute__((weak))
+ 
+ struct pv_state {
+--- a/tools/include/asm-generic/bitops/fls.h
++++ b/tools/include/asm-generic/bitops/fls.h
+@@ -2,6 +2,8 @@
+ #ifndef _ASM_GENERIC_BITOPS_FLS_H_
+ #define _ASM_GENERIC_BITOPS_FLS_H_
+ 
++#include <string.h>
++
+ /**
+  * fls - find last (most-significant) bit set
+  * @x: the word to search
+@@ -10,6 +12,7 @@
+  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+  */
+ 
++#define fls __linux_fls
+ static __always_inline int fls(unsigned int x)
+ {
+ 	int r = 32;
+--- a/tools/lib/string.c
++++ b/tools/lib/string.c
+@@ -96,6 +96,7 @@ int strtobool(const char *s, bool *res)
+  * If libc has strlcpy() then that version will override this
+  * implementation:
+  */
++#ifndef __APPLE__
+ #ifdef __clang__
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wignored-attributes"
+@@ -114,6 +115,7 @@ size_t __weak strlcpy(char *dest, const
+ #ifdef __clang__
+ #pragma clang diagnostic pop
+ #endif
++#endif
+ 
+ /**
+  * skip_spaces - Removes leading whitespace from @str.