So, I’ve got a LPC4088 with a 5" display which I need to program. I’ve found some example projects around here that I can compile, upload, and run (using the online compiler) on there. I planned to take the Hello World project as a base for my program and use MCUXpresso as the IDE. I exported the Hello World project but I noticed that MCUXpresso was not listed in the supported toolchains, so i exported as a ZIP file.
Next I made a project in MCUXpresso in which I imported the ZIP file. Then I found out that the compiler couldn’t find the header files in the project so I had to manually include all the directory’s. However, after that the compiler gives me this error.
Building target: testhelloworld.axf Invoking: MCU Linker arm-none-eabi-gcc -mcpu=cortex-m7 -mthumb -o "testhelloworld.axf" ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_colors.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_fonts.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_helvr10.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_rom8x16.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_rom8x8.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_swim.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_swim_font.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_swim_image.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_winfreesystem14x16.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_x5x7.o ./lpc4088_displaymodule_hello_world/DMBasicGUI/lpc_swim/lpc_x6x13.o c:/nxp/mcuxpressoide_10.2.1_795/ide/tools/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v7e-m\libc.a(lib_a-exit.o): In function `exit': exit.c:(.text.exit+0x16): undefined reference to `_exit' c:/nxp/mcuxpressoide_10.2.1_795/ide/tools/bin/../lib/gcc/arm-none-eabi/7.2.1/../../../../arm-none-eabi/lib/thumb/v7e-m/crt0.o: In function `_start': (.text+0x4a): undefined reference to `main' make: *** [testhelloworld.axf] Error 1 10:54:11 Build Finished (took 755ms)
It says that the main is undefined. I also tried to make a code error on purpose in the main.cpp but the compiler did not even budge, so I guess the compiler just skips some files? This is probably why it can’t see ‘main’, but I have no idea how to fix this. I guess it is something in the settings of MCUXpresso because the same project works just fine in the online compiler.
I have no idea where to look for the solution. This problem already has me busy for 3 days straight so I hope someone notices the problem.