Linux编译LVGL仿真器出错问题解决
作者：JeckXu666
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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：
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