undefined reference to 'xx'

[strawberry]

Cube IDE compiler error ( undefined reference to 'xx' )

[ataradov]

So? What if your question?

[strawberry]

error show up when using another font
cant spot difference between fonts , why one work and another not

[ataradov]

There is no chance anyone can help you with this information. You either need to provide details or figure this out on your own.

Missing symbols usually mean that you forgot to include some files for compilation.

[ejeffrey]

error show up when using another font

Another font for what?

[strawberry]

error show up when using another font

Another font for what?

for LCD

[rstofer]

Do a search for 'xx' and see where it is used.  Then figure out what it is, what it does and how to provide a value.

Look at the working source and see if 'xx' exists.  Figure out what it is what it does and how the value is provided.  Copy and paste (more or less).

Sometimes it is as simple as a spelling error.

[strawberry]

when placed (printnewstr(35,120, ORANGE, &FreeSerifItalic12pt7b, 1, "ADC1"); ) somewhere else ,it wont give error (undefined reference to 'FreeSerifItalic12pt7b') but will happen Hard fault and CPU stops
If use this font FreeMonoBold12pt7b and/or FreeMonoOblique12pt7b and disable FreeSerifItalic12pt7b and some other, everything works fine
Free RAM 18KB FLASH 64KB

[ajb]

Where are those fonts defined? Note that defining something is different from declaring it. You'll need to show your code if you want useful help

[rstofer]

Here is a font header file that includes both the declaration and definition of a font:
https://github.com/adafruit/Adafruit-GFX-Library/blob/master/Fonts/FreeSerifItalic12pt7b.h

With the definition (all those constants) in the header file, it can only be included once in a project.  If it is included in 2 separate files, the linker will complain about multiple definitions.

Make sure you have the header file included in your project.

[strawberry]

fonts code is bricked after changing int8_t to unsigned char and back again

[ataradov]

Change where exactly?

[strawberry]

 inside fonts.h file

[ataradov]

Are just trolling at this point? There are no instances of "unsigned char" in that file, and the only "int8_t" members are xOffset and yOffset, which need to be signed, as they are later initialized with negative numbers for some characters.

I'm done helping you if your replies do not contain complete and properly capitalized sentences. It is a waste of my time.

[strawberry]

This library do not work.

[JohnnyMalaria]

fonts code is bricked after changing int8_t to unsigned char and back again

Why are you changing it? And isn't it uint8_t?

What bit length is an unsigned char on your target? chars aren't always 8 bits.

[strawberry]

fonts code is bricked after changing int8_t to unsigned char and back again

Why are you changing it? And isn't it uint8_t?

What bit length is an unsigned char on your target? chars aren't always 8 bits.

try & error, no clue on how this library works

[JohnnyMalaria]

fonts code is bricked after changing int8_t to unsigned char and back again

Explain. What did you change and why?

No-one can help if you do not provide clear information.

[strawberry]

https://github.com/adafruit/Adafruit-GFX-Library + https://github.com/Bodmer/TFT_eSPI + maybe some other library => my tft library for stm32 cube ide
there could be fundamental error in theory how it should read data from flash on ARM CPU and scrap it
or one bug in anywhere in library in one line of code
found something like this https://www.educative.io/edpresso/how-to-use-the-typedef-struct-in-c
and some other general info witch do not help much

[JohnnyMalaria]

Last try - how do you know that "fonts code is bricked after changing int8_t to unsigned char and back again"?

Post an example of the font .c file that works.