Linux 编译LVGL仿真器出错

Posted 2022-01-30 JeckXu666

Linux 编译LVGL仿真器出错

一、错误现象

我在虚拟机下使用 LVGL 仿真器，编译仿真器源代码时发生报错

cc: error: unrecognized command line option ‘-Wshift-negative-value’
cc: error: unrecognized command line option ‘-Wshift-negative-value’
cc: error: unrecognized command line option ‘-Wshift-negative-value’
Building project file: lvgl/examples/widgets/chart/lv_example_chart_6.c
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/list/lv_example_list_1.o' failed
make: *** [build/obj/lvgl/examples/widgets/list/lv_example_list_1.o] Error 1
make: *** 正在等待未完成的任务....
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/spinner/lv_example_spinner_1.o' failed
make: *** [build/obj/lvgl/examples/widgets/spinner/lv_example_spinner_1.o] Error 1
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/led/lv_example_led_1.o' failed
make: *** [build/obj/lvgl/examples/widgets/led/lv_example_led_1.o] Error 1
cc: error: unrecognized command line option ‘-Wshift-negative-value’
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_3.o' failed
make: *** [build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_3.o] Error 1
cc: error: unrecognized command line option ‘-Wshift-negative-value’
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_2.o' failed
make: *** [build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_2.o] Error 1
cc: error: unrecognized command line option ‘-Wshift-negative-value’
cc: error: unrecognized command line option ‘-Wshift-negative-value’
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_1.o' failed
make: *** [build/obj/lvgl/examples/widgets/textarea/lv_example_textarea_1.o] Error 1
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.o' failed
make: *** [build/obj/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.o] Error 1
cc: error: unrecognized command line option ‘-Wshift-negative-value’
Makefile:45: recipe for target 'build/obj/lvgl/examples/widgets/chart/lv_example_chart_6.o' failed
make: *** [build/obj/lvgl/examples/widgets/chart/lv_example_chart_6.o] Error 1

编译无法进行

二、错误分析

根据提示分析错误，其中 cc： error 提示报错，翻到 Makefile 一看属于 gcc 编译器

unrecognized command line option ‘-Wshift-negative-value’ 提示无法识别指令，所以分析应该是 GCC 版本的原因，可能我的版本不支持这个指令，解决的方式就是换版本，或者删掉这个指令看能不能正常运行

三、错误解决

这里我先试试删除指令再编译，先用 grep 找到指令在文件的哪一行

grep -n "\\-Wshift\\-negative\\-value" Makefile

编辑文件，删除对应指令

vim make file

保存后程序编译

编译成功，执行 demo，可以正常执行：