From c9c0db9f75086411f203cdb3e7b99f5fbc84b164 Mon Sep 17 00:00:00 2001
From: Hui Su <3164683437@qq.com>
Date: Fri, 21 Aug 2026 12:15:01 +0800
Subject: [PATCH] [bsp/qemu-vexpress-a9] support function names in backtraces

Pass -mpoke-function-name to the compiler and assembler when
RT_BACKTRACE_FUNCTION_NAME is enabled for the Cortex-A9 QEMU BSP.
Keep the BSP configuration opt-in so users can enable symbolized
backtraces through menuconfig without changing the default build.

Validation:
- scons --pyconfig-silent
- scons -C bsp/qemu-vexpress-a9 -j2
- QEMU function-name backtrace verified with
  RT_BACKTRACE_FUNCTION_NAME enabled in a local configuration.

Signed-off-by: Hui Su <3164683437@qq.com>
---
 bsp/qemu-vexpress-a9/SConstruct | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/bsp/qemu-vexpress-a9/SConstruct b/bsp/qemu-vexpress-a9/SConstruct
index aa95fff7dfc6..f331f9411300 100644
--- a/bsp/qemu-vexpress-a9/SConstruct
+++ b/bsp/qemu-vexpress-a9/SConstruct
@@ -2,6 +2,16 @@ import os
 import sys
 import rtconfig
 
+TRACE_CONFIG = ''
+try:
+    with open('rtconfig.h') as f:
+        for line in f:
+            if line.strip() == '#define RT_BACKTRACE_FUNCTION_NAME':
+                TRACE_CONFIG = ' -mpoke-function-name'
+                break
+except OSError:
+    pass
+
 if os.getenv('RTT_ROOT'):
     RTT_ROOT = os.getenv('RTT_ROOT')
 else:
@@ -14,9 +24,9 @@ TARGET = 'rtthread.' + rtconfig.TARGET_EXT
 
 DefaultEnvironment(tools=[])
 env = Environment(tools = ['mingw'],
-    AS   = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
-    CC   = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,
-    CXX  = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+    AS   = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS + TRACE_CONFIG,
+    CC   = rtconfig.CC, CFLAGS = rtconfig.CFLAGS + TRACE_CONFIG,
+    CXX  = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS + TRACE_CONFIG,
     AR   = rtconfig.AR, ARFLAGS = '-rc',
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)