Unknown type name 'uint8_t', MinGW

Question

I get an "unknown name like" uint8_t "and the other using C in MinGW. Any ideas how to solve this?

Answer 1

Try turning on stdint.h or inttypes.h .

Answer 2

To use an alias like uint8_t , you must include the standard stdint.h header.

Answer 3

You need #include stdint.h BEFORE you #include any other library interfaces that need it.

Example:

My LCD library uses uint8_t types. I wrote my library with an interface ( Display.h ) and an implementation ( Display.c )

In display.c, I have the following options.

 #include <stdint.h> #include <string.h> #include <avr/io.h> #include <Display.h> #include <GlobalTime.h> 

And it works.

However, if I reorder them like this:

 #include <string.h> #include <avr/io.h> #include <Display.h> #include <GlobalTime.h> #include <stdint.h> 

I get an error message. This is because Display.h needs things from stdint.h , but cannot access it, because this information is compiled AFTER Display.h is displayed.

So, move stdint.h over any library that needs it, and you should no longer get the error.