芯科zigbee協調器Z3gateway在全志R11平臺交叉編譯報錯問題

../../../sl/developer/sdks/gecko_sdk_suite/v2.7/protocol/zigbee/app/ezsp-host/ezsp-host-io.c:254:25: error: 'CSTART' undeclared (first use in this function)
     tios.c_cc[VSTART] = CSTART;           // define XON and XOFF
                         ^~~~~~
../../../sl/developer/sdks/gecko_sdk_suite/v2.7/protocol/zigbee/app/ezsp-host/ezsp-host-io.c:254:25: note: each undeclared identifier is reported only once for each function it appears in
../../../sl/developer/sdks/gecko_sdk_suite/v2.7/protocol/zigbee/app/ezsp-host/ezsp-host-io.c:255:24: error: 'CSTOP' undeclared (first use in this function)
     tios.c_cc[VSTOP] = CSTOP;
                        ^~~~~
Makefile:471: recipe for target 'build/ezsp-host-io.o' failed

這個錯一開始很懵，諮詢了原廠，沒得到解答，自己慢慢排查，發現是串口配置的時候引用了幾個未定義的宏！

仔細跟蹤宏的定義頭文件，最終在交叉編譯工具的文件裏找到，附上解決辦法：

#include "/opt/arm-openwrt-linux-toolchain/include/sys/ttydefaults.h"

在ezsp-host-io.c裏增加頭文件，就可以解決這個錯誤。

出錯的原因應該是原廠的SDK路徑配置錯誤問題，還未定義到具體原因。