Ubuntu 20: undefined reference to `pthread_create'

[losingrose]

1. 开发环境

Ubuntu 20

• 模组或开发板：ESP8266
• esp-aliyun 版本（git rev-parse --short HEAD 来获取 commit id）：1259029
• ESP8266_RTOS_SDK 版本（git rev-parse --short HEAD 来获取 commit id）：6c438bce
• ESP-IDF 版本（git rev-parse --short HEAD 来获取 commit id）：
  Toolchain version: crosstool-ng-1.22.0-100-ge567ec7

2. 问题描述

make编译失败。最后报错找不到pthread_create

Generating esp8266.project.ld
LD build/smart_light.elf
/home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o):(.literal.HAL_ThreadCreate+0x4): undefined reference to pthread_create' /home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o):(.literal.HAL_ThreadDelete+0x0): undefined reference to pthread_exit'
/home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o):(.literal.HAL_ThreadDelete+0x4): undefined reference to pthread_cancel' /home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o):(.literal.HAL_ThreadDelete+0x8): undefined reference to pthread_join'
/home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o): In function HAL_ThreadCreate': /home/losingrose/esp/esp-aliyun/wrappers/wrapper_os.c:267: undefined reference to pthread_create'
/home/losingrose/esp/esp-aliyun/wrappers/wrapper_os.c:267: undefined reference to pthread_create' /home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/esp-aliyun/libesp-aliyun.a(wrapper_os.o): In function HAL_ThreadDelete':
/home/losingrose/esp/esp-aliyun/wrappers/wrapper_os.c:267: undefined reference to pthread_exit' /home/losingrose/esp/esp-aliyun/wrappers/wrapper_os.c:267: undefined reference to pthread_cancel'
/home/losingrose/esp/esp-aliyun/wrappers/wrapper_os.c:267: undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
make: *** [/home/losingrose/esp/ESP8266_RTOS_SDK/make/project.mk:510：/home/losingrose/esp/esp-aliyun/examples/solutions/smart_light/build/smart_light.elf] 错误 1

[ESP-YJM]

有没有先执行make chip=esp8266 defconfig, 执行这个会打开 CONFIG_ENABLE_PTHREAD。https://github.com/espressif/esp-aliyun/blob/master/examples/solutions/smart_light/sdkconfig_esp8266.defaults#L2

[losingrose]

执行后OK了，感谢你的回复。
开始被SDK和工具链的版本对应折腾了好几天，都快放弃了，使用make aliyun搞懂版本对应以后，感觉就快成功了，心急了。
希望能在文档中加一个 代码版本-SDK版本-工具链版本 的对应说明，对于新手来说很难能找到对应关系。