Merge pull request #48220 from BrettDong/mingw

Fix C++ symbol demangling on cross-compile MinGW

src/debug.cpp

@@ -811,7 +811,18 @@ static const char *demangle( const char *symbol )
     if( status == 0 ) {
         return demangled;
     }
+#if defined(_WIN32)
+    // https://stackoverflow.com/questions/54333608/boost-stacktrace-not-demangling-names-when-cross-compiled
+    // libbacktrace may strip leading underscore character in the symbol name returned
+    // so if demangling failed, try again with an underscore prepended
+    std::string prepend_underscore( "_" );
+    prepend_underscore = prepend_underscore + symbol;
+    demangled = abi::__cxa_demangle( prepend_underscore.c_str(), nullptr, nullptr, &status );
+    if( status == 0 ) {
+        return demangled;
+    }
 #endif // defined(_WIN32)
+#endif // compiler macros
     return symbol;
 }