Solution to the error in compiling LVGL emulator on Linux
1. Error phenomenonI 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 AnalysisAnalyze 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.
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 resolutionHere 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
Edit the file and delete the corresponding instructions vim make file
Save and compile the program
The compilation is successful, and the demo can be executed normally:
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