问题描述RTThreadTouchGFX开发编译报错错误原因是Line控件相关函数touchgfx::paint::rgb888::lineFromColor在新版本中可能被屏蔽了需要将其调用出来D:\RT-ThreadStudio\workspace\ART\libraries\touchgfx_lib\Middlewares\ST\touchgfx\lib\core\cortex_m7\gcc\libtouchgfx-float-abi-hard.a(PainterRGB888.o):In function touchgfx::PainterRGB888::paint(unsignedchar*,short,short,short,short,unsignedchar)const:(.text._ZNK8touchgfx13PainterRGB8885paintEPhssssh0x18):undefined reference to touchgfx::paint::rgb888::lineFromColor(unsignedchar*,unsignedint,unsignedlong,unsignedchar) D:\RT-ThreadStudio\workspace\ART\libraries\touchgfx_lib\Middlewares\ST\touchgfx\lib\core\cortex_m7\gcc\libtouchgfx-float-abi-hard.a(PainterRGB888.o):In function touchgfx::PainterRGB888::tearDown()const:(.text._ZNK8touchgfx13PainterRGB8888tearDownEv0x0):undefined reference to touchgfx::paint::rgb888::tearDown()解决方法按照下面三个步骤进行操作1、将hal文件夹添加构建2、将canvas文件夹添加构建3、在PainterRGB888.hpp中添加头文件【注意若修改虽说能画线但是整个工程的C/C索引器会失效即无法跳转函数或查看变量定义这是TouchGFX4.23.0版本BUG建议更新更高版本】