Solution to the error in compiling LVGL emulator on Linux

1. Error phenomenon
2. Error Analysis
3. Error resolution

1. Error phenomenon

I am using the LVGL emulator in a virtual machine and an error occurs when compiling the emulator source code

 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: *** Waiting for unfinished tasks....
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

Compilation cannot proceed

2. Error Analysis

Analyze the error according to the prompts. The cc: error prompts an error. Turn to the Makefile and see that it belongs to the gcc compiler.

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unrecognized command line option '-Wshift-negative-value' prompts that the command cannot be recognized, so the analysis should be due to the GCC version. Maybe my version does not support this command. The solution is to change the version or delete this command to see if it can run normally.

3. Error resolution

Here I will try to delete the command and then compile it. First use grep to find which line of the file the command is in

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

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Edit the file and delete the corresponding instructions

 vim make file

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Save and compile the program

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The compilation is successful, and the demo can be executed normally:

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This is the end of this article about solving the error problem of compiling LVGL emulator on Linux. For more relevant content about Linux LVGL emulator error, please search the previous articles of 123WORDPRESS.COM or continue to browse the related articles below. I hope you will support 123WORDPRESS.COM in the future!

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