unknown type name uint8 t MinGW

Question

I get  unknown type name  uint8 t   and others like it using C in MinGW  Any ideas how to solve this

User · Accepted Answer

Try including stdint h or inttypes h

User · Answer

To use uint8 t type alias  you have to include stdint h standard header

User · Answer

EDIT    To Be Clear   If the order of your  includes matters and it is not part of your design pattern  read  you don t know why   then you need to rethink your design  Most likely  this just means you need to add the  include to the header file causing problems   At this point  I have little interest in discussing defending the merits of the example but will leave it up as it illustrates some nuances in the compilation process and why they result in errors   END EDIT  You need to  include the 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 includes    include  lt stdint h gt   include  lt string h gt   include  lt avr io h gt   include  lt Display h gt   include  lt GlobalTime h gt    And this works   However  if I re-arrange them like so    include  lt string h gt   include  lt avr io h gt   include  lt Display h gt   include  lt GlobalTime h gt   include  lt stdint h gt    I get the error you describe   This is because Display h needs things from stdint h but can t access it because that information is compiled AFTER Display h is compiled    So move stdint h above any library that need it and you shouldn t get the error anymore

User · Answer

I had to include  PROJECT NAME osdep h  and that includes the os specific configurations    I would look in other files using the types you are interested in and find where how they are defined  by looking at includes

[c] unknown type name 'uint8_t', MinGW

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