Project added code does not build - undefined reference to

[Badman]

I am using MCUXpresso IDE v11.5.1 [Build 7266] [2022-04-13].

I added icludes path to "${workspace_loc:/${ProjName}/hd44780}"

I added source location to "WYS_HD44780\hd44780"

However, when building, I have a message undefined reference to... What am I doing wrong ?

Building target: WYS_HD44780.axf
Invoking: MCU Linker
arm-none-eabi-gcc -nostdlib -L"/home/badman/Programowanie/LPC1114_MCU/CMSIS_CORE_LPC11xx/Debug" -Xlinker -Map="WYS_HD44780.map" -Xlinker --cref -Xlinker --gc-sections -Xlinker -print-memory-usage -mcpu=cortex-m0 -mthumb -T "WYS_HD44780_Debug.ld" -o "WYS_HD44780.axf"  ./src/WYS_HD44780.o ./src/cr_startup_lpc11xx.o ./src/crp.o ./src/delay.o   -lCMSIS_CORE_LPC11xx
/usr/local/mcuxpressoide-11.5.1_7266/ide/plugins/com.nxp.mcuxpresso.tools.linux_11.5.1.202201181444/tools/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld: ./src/WYS_HD44780.o: in function `main':
Memory region         Used Size  Region Size  %age Used
        MFlash32:         672 B        32 KB      2.05%
         RamLoc8:          0 GB         8 KB      0.00%
/home/badman/Programowanie/LPC1114_MCU/WYS_HD44780/Debug/../src/WYS_HD44780.c:20: undefined reference to `lcd_init'
/usr/local/mcuxpressoide-11.5.1_7266/ide/plugins/com.nxp.mcuxpresso.tools.linux_11.5.1.202201181444/tools/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld: /home/badman/Programowanie/LPC1114_MCU/WYS_HD44780/Debug/../src/WYS_HD44780.c:21: undefined reference to `lcd_str'
collect2: error: ld returned 1 exit status
make[1]: *** [makefile:47: WYS_HD44780.axf] Błąd 1
make: *** [makefile:38: all] Błąd 2
"make -r -j3 all" terminated with exit code 2. Build might be incomplete.

[ZhangJennie · Accepted solution]

Hi 

Your first screenshot doesn't include "src" path. please add it.

Besides, I suggest you importing a lpcopen demo code, refer the demo code path settings to set your project path.

If the problem persists, please upload your project here, thus we can check it directly.

Thanks,

Jun Zhang

[Badman]

I checked all the settings, it turned out that I deleted the file hd44780.c from the added folder hd44780.

The function prototypes were in the file hd44780.h and the functions were missing hence the undefined reference message.