目录
一、错误征象
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
复制代码
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’ 提示无法辨认指令，以是分析应该是 GCC 版本的原因，大概我的版本不支持这个指令，解决的方式就是换版本，大概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，删除对应指令复制代码
生存后步伐编译
编译成功，实行 demo，可以正常实行：
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