[Build Error] "function1 not declared" in Screen1View despite correct declaration in .hpp

Question

Hi everyone,

I'm facing a strange issue in my TouchGFX project. I added a new method function1() in my Screen1View class,
and when i create the definition of that function1() in screen1View.cpp it showing the function not declared i followed controllltech youtube tutorial but for me im stuck here.

i will share the .hpp and .cpp and error messages
error im getting

16:39:36 **** Incremental Build of configuration Debug for project STM32H735G-DK ****

make -j8 all

arm-none-eabi-g++ "C:/TouchGFXProjects/MyApplication_14/TouchGFX/gui/src/screen1_screen/Screen1View.cpp" -mcpu=cortex-m7 -std=gnu++14 -g3 -DUSE_HAL_DRIVER -DUSE_BPP=24 -DDEBUG -DSTM32H735xx -DUSE_PWR_DIRECT_SMPS_SUPPLY -c -I../../Core/Inc -I../../TouchGFX/App -I../../TouchGFX/target/generated -I../../TouchGFX/target -I../../Drivers/STM32H7xx_HAL_Driver/Inc -I../../Drivers/STM32H7xx_HAL_Driver/Inc/Legacy -I../../Middlewares/Third_Party/FreeRTOS/Source/include -I../../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS_V2 -I../../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F -I../../Drivers/CMSIS/Device/ST/STM32H7xx/Include -I../../Drivers/CMSIS/Include -I../../Drivers/BSP/Components/Common -I../../Drivers/BSP/STM32H735G-DK -I../../Middlewares/ST/touchgfx/framework/include -I../../TouchGFX/generated/fonts/include -I../../TouchGFX/generated/gui_generated/include -I../../TouchGFX/generated/images/include -I../../TouchGFX/generated/texts/include -I../../TouchGFX/gui/include -I../../TouchGFX/generated/videos/include -I../../LIBJPEG/App -I../../LIBJPEG/Target -I../../Middlewares/Third_Party/LibJPEG/include -Os -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti -fno-use-cxa-atexit -Wall -femit-class-debug-always -fstack-usage -fcyclomatic-complexity -MMD -MP -MF"Application/User/gui/Screen1View.d" -MT"Application/User/gui/Screen1View.o" --specs=nano.specs -mfpu=fpv5-d16 -mfloat-abi=hard -mthumb -o "Application/User/gui/Screen1View.o"

C:/TouchGFXProjects/MyApplication_14/TouchGFX/gui/src/screen1_screen/Screen1View.cpp:19:6: error: no declaration matches 'void Screen1View::function1()'
19 | void Screen1View::function1()
| ^~~~~~~~~~~
C:/TouchGFXProjects/MyApplication_14/TouchGFX/gui/src/screen1_screen/Screen1View.cpp:19:6: note: no functions named 'void Screen1View::function1()'
In file included from C:/TouchGFXProjects/MyApplication_14/TouchGFX/gui/src/screen1_screen/Screen1View.cpp:1:
../../TouchGFX/gui/include/gui/screen1_screen/Screen1View.hpp:7:7: note: 'class Screen1View' defined here
7 | class Screen1View : public Screen1ViewBase
| ^~~~~~~~~~~
make: *** [Application/User/gui/subdir.mk:34: Application/User/gui/Screen1View.o] Error 1
"make -j8 all" terminated with exit code 2. Build might be incomplete.

16:39:37 Build Failed. 2 errors, 0 warnings. (took 860ms)

.hpp file

#ifndef SCREEN1VIEW_HPP
#define SCREEN1VIEW_HPP

#include <gui_generated/screen1_screen/Screen1ViewBase.hpp>
#include <gui/screen1_screen/Screen1Presenter.hpp>

class Screen1View : public Screen1ViewBase
{
public:
Screen1View();
virtual ~Screen1View() {}
virtual void setupScreen();
virtual void tearDownScreen();

virtual void function1();
protected:
};

#endif // SCREEN1VIEW_HPP

.cpp file below

#include <gui/screen1_screen/Screen1View.hpp>

Screen1View::Screen1View()
{
}

void Screen1View::setupScreen()
{
Screen1ViewBase::setupScreen();
}

void Screen1View::tearDownScreen()
{
Screen1ViewBase::tearDownScreen();
}

void Screen1View::function1()
{

}

GaetanGodart · Accepted Answer

There is a * in front of your hpp file name, this is because the file have has a change and you did not save.
Perhaps you added the line 16 and did not save, so for the compiler, the line 16 doesn't exist and same for the zipping program.

Can you save your file and try again?

removing the function definition in the cpp file
it will compilee the code that i checked

If my guess above is right then yes, removing the definition in the cpp would compile fine (I have also tried that with the zip file you shared and it worked for me too).

but even if i add function definition in cpp file it should compile right ?

If you only add a function definition in a cpp file but no function declaration in a hpp file, I don't thing it would compile.
However, having a function declaration in a hpp file but no function definition in cpp would compile.
Alternatively you could also directly do both the declaration and the definition of the function at once in the hpp.

I think the first step would be to save your project and try again to compile.

You can also unzip the file and sent me and you will see that there is no function declaration in the hpp.

Regards,

GaetanGodart · Answer

Hello @Jerrythottathil ,

When adding code, I recommend you to use the "Insert code" button to keep thinks clear :

I have modified your post for this time. :)

I have copy pasted your function 1 declaration and definition in a random project where I have Screen1View as well and it compiled fine.

How did you create your TouchGFX Project?
Did you make it from scratch (including the Makefile)?
Did you create it from TouchGFX Designer by creating either a simulator project or a project linked to a board + display combo?

Can you share your full project?

Regards,

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