Compiler warning from option -Wno-frame-address (GIT8266O-464)

Environment

Development Kit: N/A
IDF version: ee0c4459
Compiler version: xtensa-lx106-elf-gcc (crosstool-NG crosstool-ng-1.22.0-100-ge567ec7) 5.2.0
Development Env: Make
Operating System: MacOS
Power Supply: N/A

Problem Description

When compiling any app if there are any errors or warnings (such as an unused variable) I also see the added warning: cc1: warning: unrecognized command line option '-Wno-frame-address' If there are no warnings then the compilation output is clean.

I have not found any reference to the -Wno-frame-address flag on either gcc Warning Options or gcc Xtensa Options

There are references to -Wframe-larger-than=byte-size and -Wframe-address which I'm wondering could have been intended? Otherwise removing the offending flag from the make/project.mk COMMON_FLAGS does remove the extra noise from the output log, but since I cannot find a reference to what that flag is used for I'm not sure if there would be unintended side effects etc.

Expected Behavior

Application compilation output should only show warnings that are relevant to the app level code, not warnings being raised by potentially unsupported compiler flags.

Actual Behavior

Each time time an error or warning is generated, an un-related unsupported compiler flag warning is logged as well.

Steps to reproduce

navigate to installed ESP8266_RTOS_SDK directory
edit examples/get-started/hello_world/hello_world_main.c
Initialize any variable such as int unused_int;
make

Code to reproduce this issue

in hello_world_main.c add any unused variable


#include "esp_log.h"

void app_main()
{
    int unused_int;
}

Debug Logs

for each compiled file with any warning or error the output I see is:

/ESP8266_RTOS_SDK/examples/get-started/hello_world/main/hello_world_main.c: In function 'app_main':
/ESP8266_RTOS_SDK/examples/get-started/hello_world/main/hello_world_main.c:19:9: warning: unused variable 'unused_int' [-Wunused-variable]
     int unused_int;
         ^
/ESP8266_RTOS_SDK/examples/get-started/hello_world/main/hello_world_main.c: At top level:
cc1: warning: unrecognized command line option '-Wno-frame-address'

espressif / ESP8266_RTOS_SDK