From f4ef2bc965b5d52dc716dd1d006d53659cd5f1ac Mon Sep 17 00:00:00 2001
From: wangmingrong1 <wangmingrong1@xiaomi.com>
Date: Mon, 14 Oct 2024 21:43:11 +0800
Subject: [PATCH] llvm clang: llvm comes with unwind library, add unwind
 compilation

1. In the llvm clang15 version, the gcov implementation calls the unwind symbol __aeabi_unwind_cpp_pr0
2. Add default link, similar to COMPILER_RT_LIB
3. libUnwind needs to call the __assert_func API

Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com>
---
 arch/arm/src/common/Toolchain.defs | 6 ++++++
 include/assert.h                   | 7 +++++++
 libs/libc/assert/lib_assert.c      | 6 ++++++
 3 files changed, 19 insertions(+)

diff --git a/arch/arm/src/common/Toolchain.defs b/arch/arm/src/common/Toolchain.defs
index 7c3e01082c434..524d677d6bd12 100644
--- a/arch/arm/src/common/Toolchain.defs
+++ b/arch/arm/src/common/Toolchain.defs
@@ -465,6 +465,12 @@ endif
 
 EXTRA_LIBS += $(COMPILER_RT_LIB)
 
+ifeq ($(CONFIG_ARCH_TOOLCHAIN_CLANG),y)
+    COMPILER_UNWIND_LIB := $(wildcard $(shell $(CC) $(ARCHCPUFLAGS) --print-file-name libunwind.a))
+endif
+
+EXTRA_LIBS += $(COMPILER_UNWIND_LIB)
+
 ifeq ($(CONFIG_LIBM_TOOLCHAIN),y)
   ifeq ($(CONFIG_ARM_TOOLCHAIN_GHS),y)
     ifeq ($(CONFIG_ARCH_FPU),y)
diff --git a/include/assert.h b/include/assert.h
index cac7cb3a241f5..ec4bd57894605 100644
--- a/include/assert.h
+++ b/include/assert.h
@@ -197,6 +197,13 @@ void _assert(FAR const char *filename, int linenum,
 void __assert(FAR const char *filename, int linenum,
               FAR const char *msg) noreturn_function;
 
+/****************************************************************************
+ * Name: __assert_func
+ ****************************************************************************/
+
+void __assert_func(const char *file, int linenum,
+                   const char *func, const char *msg);
+
 #undef EXTERN
 #ifdef __cplusplus
 }
diff --git a/libs/libc/assert/lib_assert.c b/libs/libc/assert/lib_assert.c
index 4a71163d55ab6..4af8c6bf07d07 100644
--- a/libs/libc/assert/lib_assert.c
+++ b/libs/libc/assert/lib_assert.c
@@ -38,3 +38,9 @@ void __assert(FAR const char *filename, int linenum, FAR const char *msg)
   _assert(filename, linenum, msg, NULL);
   abort();
 }
+
+void __assert_func(const char *file, int linenum,
+                   const char *func, const char *msg)
+{
+  __assert(file, linenum, msg);
+}