CMake: xtensa-esp32s3-elf-gcc is not able to compile a simple test program

[yh-sb]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

esp32-elf toolchain is able to work fine and compile a simple test program.
Looks like hotfix from xtensa-esp-elf 13.2.0 toolchain is missing in the latest 14.2.0.

Actual behavior (suspected bug)

Got the following error at the very beginning when trying to compile simple project.
xtensa-esp32s3-elf-gcc is not able to compile a simple test program

NOTE:

• There is no such error with (hotfixed version) xtensa-esp-elf-13.2.0_20240530-x86_64-w64-mingw32_hotfix.zip
• There is no such error when using latest esp32-elf toolchain (13.2.0_20240530) from ESP-IDF v5.3.1 package. Everything compiles fine in this case.

Error logs or terminal output

cmake . -Bbuild -G Ninja -DCMAKE_BUILD_TYPE=Debug
-- The C compiler identification is GNU 14.2.0
-- The CXX compiler identification is GNU 14.2.0
-- The ASM compiler identification is GNU
-- Found assembler: C:/Program Files/mydevtools/xtensa-esp-elf/bin/xtensa-esp32s3-elf-gcc.exe
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - failed
-- Check for working C compiler: C:/Program Files/mydevtools/xtensa-esp-elf/bin/xtensa-esp32s3-elf-gcc.exe
-- Check for working C compiler: C:/Program Files/mydevtools/xtensa-esp-elf/bin/xtensa-esp32s3-elf-gcc.exe - broken
CMake Error at C:/Program Files/mydevtools/CMake/share/cmake-3.30/Modules/CMakeTestCCompiler.cmake:67 (message):
  The C compiler

    "C:/Program Files/mydevtools/xtensa-esp-elf/bin/xtensa-esp32s3-elf-gcc.exe"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: 'D:/dev/cpp/mcu-cpp/build/CMakeFiles/CMakeScratch/TryCompile-851lr3'

    Run Build Command(s): C:/PROGRA~1/MYDEVT~1/Ninja/ninja.exe -v cmTC_e1922
    [1/2] C:\PROGRA~1\MYDEVT~1\XTENSA~2\bin\XT34AB~1.EXE    -o CMakeFiles/cmTC_e1922.dir/testCCompiler.c.obj -c D:/dev/cpp/mcu-cpp/build/CMakeFiles/CMakeScratch/TryCompile-851lr3/testCCompiler.c
    FAILED: CMakeFiles/cmTC_e1922.dir/testCCompiler.c.obj
    C:\PROGRA~1\MYDEVT~1\XTENSA~2\bin\XT34AB~1.EXE    -o CMakeFiles/cmTC_e1922.dir/testCCompiler.c.obj -c D:/dev/cpp/mcu-cpp/build/CMakeFiles/CMakeScratch/TryCompile-851lr3/testCCompiler.c
    cc1.exe: fatal error: Both 'XTENSA_GNU_CONFIG' and "-dynconfig=" specified but pointed different files: "'C:\PROGRA~1\MYDEVT~1\XTENSA~2\lib\XTENSA~3.SO'" "'xtensa_esp32s3.so'"
    compilation terminated.
    ninja: build stopped: subcommand failed.





  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:12 (project)


-- Configuring incomplete, errors occurred!

Steps to reproduce the behavior

cmake . -Bbuild -G Ninja -DCMAKE_BUILD_TYPE=Debug
cmake --build build -j

CMakeLists.txt

cmake_minimum_required(VERSION 3.15)

find_program(CMAKE_C_COMPILER NAMES xtensa-esp32s3-elf-gcc)
find_program(CMAKE_CXX_COMPILER NAMES xtensa-esp32s3-elf-g++)
find_program(CMAKE_ASM_COMPILER NAMES xtensa-esp32s3-elf-gcc)
find_program(CMAKE_OBJCOPY NAMES xtensa-esp32s3-elf-objcopy)
find_program(CMAKE_SIZE NAMES xtensa-esp32s3-elf-size)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR esp32)
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)

project(esp32s3 C CXX ASM)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(CMAKE_CXX_STANDARD 20)

add_compile_options(
    $<$<NOT:$<COMPILE_LANGUAGE:ASM>>:-mlongcalls>
    -ffunction-sections
    -fdata-sections
    $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-threadsafe-statics>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-use-cxa-atexit>
)

add_executable(${CMAKE_PROJECT_NAME} main.cpp)

# esp-idf
include(third_party/esp-idf/tools/cmake/idf.cmake)
idf_build_process(esp32s3
    COMPONENTS freertos nvs_flash esptool_py esp_wifi
    SDKCONFIG_DEFAULTS "${CMAKE_CURRENT_LIST_DIR}/sdkconfig.defaults"
    SDKCONFIG "${CMAKE_BINARY_DIR}/sdkconfig"
)
idf_build_executable(${CMAKE_PROJECT_NAME})

target_link_options(${CMAKE_PROJECT_NAME} PRIVATE
    -nostdlib
    -Wl,--gc-sections
    -Wl,-Map=${CMAKE_PROJECT_NAME}.map,--cref
)

target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE
    idf::freertos
    idf::nvs_flash
    idf::esp_wifi
)

main.cpp

// Example for ESP32-S3

#include <cstring>
#include "FreeRTOS.h"
#include "task.h"
#include "esp_system.h"
#include "esp_mac.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "nvs_flash.h"

static void heartbeat_task(void *pvParameters)
{
    while(1)
    {
        // Toggle the LED
        
        vTaskDelay(pdMS_TO_TICKS(500));
    }
}

static void wifi_event_handler(void *ctx, esp_event_base_t event_base,
    int32_t event_id, void* event_data)
{
    printf("wifi_event_handler() event_id=%d\n", event_id);
    
    switch(event_id)
    {
        case WIFI_EVENT_AP_STACONNECTED:
        {
            wifi_event_ap_staconnected_t *event = static_cast<wifi_event_ap_staconnected_t *>(event_data);
            printf("station " MACSTR " join, AID=%d\n", MAC2STR(event->mac), event->aid);
        }
        break;
        
        case WIFI_EVENT_AP_STADISCONNECTED:
        {
            wifi_event_ap_stadisconnected_t *event = static_cast<wifi_event_ap_stadisconnected_t *>(event_data);
            printf("station " MACSTR " leave, AID=%d\n", MAC2STR(event->mac), event->aid);
        }
        break;
    }
}

static void wifi_init_softap(void)
{
    esp_netif_init();
    
    esp_event_loop_create_default();
    esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, nullptr);
    
    wifi_init_config_t wifi_init_cfg = WIFI_INIT_CONFIG_DEFAULT();
    esp_wifi_init(&wifi_init_cfg);
    esp_wifi_set_storage(WIFI_STORAGE_RAM);
    
    wifi_config_t wifi_cfg = {};
    wifi_cfg.ap.max_connection = 4;
    strcpy((char *)wifi_cfg.ap.ssid, "esp32-ap2");
    wifi_cfg.ap.ssid_len = sizeof("esp32-ap2") - 1;
    strcpy((char *)wifi_cfg.ap.password, "wifipass");
    wifi_cfg.ap.authmode = WIFI_AUTH_OPEN;
    
    esp_wifi_set_mode(WIFI_MODE_AP);
    esp_wifi_set_config(WIFI_IF_AP, &wifi_cfg);
    esp_wifi_start();
}

// uart baud rate is 115200
extern "C" void app_main()
{
    esp_err_t res = nvs_flash_init();
    if (res == ESP_ERR_NVS_NO_FREE_PAGES || res == ESP_ERR_NVS_NEW_VERSION_FOUND)
    {
        nvs_flash_erase();
        res = nvs_flash_init();
    }
    wifi_init_softap();
    
    xTaskCreate(heartbeat_task, "heartbeat", configMINIMAL_STACK_SIZE, nullptr, 1, nullptr);
}

esp-idf v5.3.1

Project release version

esp-14.2.0_20241119, esp-13.2.0_20240530

System architecture

Intel/AMD 64-bit (modern PC, older Mac)

Operating system

Windows

Operating system version

Windows 11 23H2 22631.4460

Shell

CMD

Additional context

• There is no such error with (hotfixed version) xtensa-esp-elf-13.2.0_20240530-x86_64-w64-mingw32_hotfix.zip
• There is no such error when using latest esp32-elf toolchain (13.2.0_20240530) from ESP-IDF v5.3.1 package. Everything compiles fine in this case.

[Lapshin]

@yh-sb , thank you for the report. I don't see the differences in a code between 13.2.0_20240530 and later releases. All of them are affected by such behavior.

Could you please move the toolchain to a path without spaces? It seems that this is the issue. Spaces in paths are not yet supported for Windows in IDF and related tools (yet). IDF Windows installer doesn't even allow installation to a path with spaces.

[yh-sb]

Yeah @Lapshin, you are indeed right. Just checked it out.

But, interesting that toolchain with "hotfix" works fine with spaces in path:
xtensa-esp-elf-13.2.0_20240530-x86_64-w64-mingw32_hotfix.zip

[Lapshin]

@yh-sb , spaces in windows paths will be supported and tested in the next release